WO2015109512A1 - 一种随机接入的方法及装置 - Google Patents

一种随机接入的方法及装置 Download PDF

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Publication number
WO2015109512A1
WO2015109512A1 PCT/CN2014/071315 CN2014071315W WO2015109512A1 WO 2015109512 A1 WO2015109512 A1 WO 2015109512A1 CN 2014071315 W CN2014071315 W CN 2014071315W WO 2015109512 A1 WO2015109512 A1 WO 2015109512A1
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WO
WIPO (PCT)
Prior art keywords
terminal device
base station
configuration information
prach
information
Prior art date
Application number
PCT/CN2014/071315
Other languages
English (en)
French (fr)
Inventor
胡振兴
权威
杨晓东
李秉肇
张戬
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201910533216.7A priority Critical patent/CN110312319A/zh
Priority to EP21178261.0A priority patent/EP3944713A1/en
Priority to CN201480001628.1A priority patent/CN105165099B/zh
Priority to PCT/CN2014/071315 priority patent/WO2015109512A1/zh
Priority to EP14879945.5A priority patent/EP3089542B1/en
Publication of WO2015109512A1 publication Critical patent/WO2015109512A1/zh
Priority to US15/216,949 priority patent/US10455620B2/en
Priority to US16/588,366 priority patent/US20200029370A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0833Random access procedures, e.g. with 4-step access
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/002Transmission of channel access control information
    • H04W74/006Transmission of channel access control information in the downlink, i.e. towards the terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30Services specially adapted for particular environments, situations or purposes
    • H04W4/40Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/90Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and apparatus for random access. Background technique
  • the data exchange between the base station and the user equipment is more and more frequent, and the quality requirements of the data interaction are also greatly improved, which causes the user equipment to transmit and receive the signal coverage area of the base station and the signal transmission and reception.
  • the quality requirements are getting higher and higher.
  • UEs user equipment
  • UEs user equipment
  • terminals of machine type communication such as electricity meters and water meters placed in buildings, basements or iron boxes.
  • the signals of these places are not very good.
  • the signal is usually enhanced by repeated transmission (i.e., spread spectrum).
  • the UE when the UE needs to perform random access, it is preferred to select a random access code, and then select a PRACH (physical random access channel) based on the PRACH configuration in the system information. Then, the UE sends the selected random access code on the selected PRACH, and starts to try to obtain the random access response sent by the base station after the three subframes, and the random access response is masked by the PDCCH to cover the RA-RNTI (random connection). Into the wireless network temporary identification) to schedule.
  • PRACH physical random access channel
  • the same preamble (preamble) needs to be transmitted by using multiple consecutive PRACH resources.
  • the following problem occurs: Due to the poor coverage level of the UE, the base station in the process of repeatedly transmitting the preamble signal It may not be possible to completely detect all preambles, which may result in the base station not being able to accurately determine the start and end positions of the PRACH resources for which the UE repeatedly transmits the preamble, and thus cannot be correctly accessed; in addition, since normal UEs (that is, no coverage enhancement is required), it is still possible to select The same PRACH resource, in which the RAR (Random Access Response) repeatedly transmitted by the base station collides with the RAR requested by the normal UE, resulting in normal The UE cannot access properly.
  • RAR Random Access Response
  • An embodiment of the present invention provides a method and apparatus for random access, which is configured to obtain a PRACH configuration information of a base station, and then parse a corresponding initial PRACH resource to send a preamble, so that the base station identifies that the access request of the enhanced terminal device does not affect the access request. Access to other terminal devices.
  • an embodiment of the present invention provides a terminal device, including:
  • a first acquiring unit configured to acquire at least one set of physical random access channel PRACH configuration information that is stored, where the at least one set of PRACH configuration information is carried in system information sent by the base station;
  • a processing unit configured to parse the at least one set of PRACH configuration information, to obtain a corresponding initial PRACH resource
  • a first sending unit configured to start sending a preamble preamble to the base station from the starting PRACH resource, so that the base station establishes a connection with the terminal device according to the reamble.
  • the system message includes at least the at least one set of PRACH configuration information, where the content of the PRACH configuration information includes a preset period time and/or a preset Starting position.
  • the first acquiring unit is further configured to receive the system message from the base station, where the processing unit is further configured to calculate a path loss in a signal transmission process according to the downlink information, and determine a matching according to the path loss. Coverage enhancement level.
  • the first acquiring unit is further configured to acquire downlink resource information sent by the base station according to the specified random access radio network temporary identifier RA-RNTI calculation formula on the PDCCH channel, and receive channel according to the descrambled downlink resource information. From the base The random access of the station responds to the RAR, and sends the msg3 according to the number of repetitions corresponding to the repetition number index carried by the RAR.
  • the terminal device further includes:
  • the determining unit is configured to stop sending the preamble to the base station in the preset time period if the obtained downlink resource information carries the reject accepting information, where the rejecting the acceptance information includes rejecting the accepting instruction and/or the pre Set the time period.
  • the first acquiring unit is further configured to acquire downlink resource information of the specified downlink control information DCI format sent by the base station on the PDCCH channel;
  • the first sending unit is further configured to receive the RAR from the base station according to the downlink resource information in the specified DCI format, and send the ms g 3 according to the repetition number corresponding to the complex index carried by the RAR.
  • the receiving, by the system message from the base station includes There are multiple sets of PRACH configuration information, and each set of PRACH configuration information corresponds to one coverage enhancement level, where
  • the processing unit is specifically configured to: match the corresponding PRACH configuration information according to the matched coverage enhancement level; and obtain the corresponding initial PRACH resource according to the matched PRACH configuration information.
  • the system message from the base station further includes at least one set of access category blocking EACB parameters, and each set of EACB parameters corresponds to one coverage enhancement level, wherein the processing unit is further configured to use the corresponding coverage
  • the enhancement level selects the corresponding EACB parameter, and further determines whether the base station allows access according to the EACB parameter, and the result of the EACB parameter determination is used to indicate whether the initial PRACH resource is used. Sending a preamble to the base station according to a preset frequency.
  • the determining unit is further configured to: if the result of the EACB parameter determination is that access is allowed, perform an enhanced access reject EAB decision and/or an ACB decision, where the result of the EAB decision and/or the ACB decision is used to indicate whether And transmitting a reamble to the base station according to a preset frequency from the initial PRACH resource.
  • an embodiment of the present invention provides a base station, including:
  • a configuration unit configured to pre-configure a physical random access channel (PRACH) resource, and generate at least one set of PRACH configuration information, where the terminal device obtains the at least one set of PRACH configuration information;
  • the terminal device matches the corresponding initial PRACH resource according to the at least one set of PRACH configuration information, where the content of the PRACH configuration information includes a preset cycle time and/or a preset start location;
  • PRACH physical random access channel
  • a second acquiring unit configured to receive a preamble from the terminal device, and perform scrambling on a downlink resource information corresponding to the initial PRACH resource according to a calculation formula of a specified random access wireless network temporary identifier R A-RNT I;
  • a second sending unit configured to send the scrambled downlink resource information to the terminal device on the PDCCH channel, so that the terminal device acquires the scrambled downlink resource information on the PDCCH channel and according to the specified RA-
  • the RNTI calculation formula descrambles the downlink resource information.
  • the second sending unit is further configured to send a random access response RAR to the terminal device, so that the terminal device sends the msg3 according to the repetition number corresponding to the repetition number index carried by the RAR.
  • the second sending unit is further configured to send the reject accepting information to the terminal device on the PDCCH channel, so that the terminal device stops sending the preamble within a preset time period, and the rejecting the acceptance information includes rejecting the accepting Instructions and/or the presets period.
  • the second sending unit is further configured to send the downlink resource information of the specified downlink control information DCI format to the terminal device on the PDCCH channel, so that the terminal device receives the downlink resource information in the specified DCI format; And waiting for the preset processing time, sending a random access response RAR to the terminal device, so that the terminal device sends the ms g 3 according to the repetition number corresponding to the repetition number index carried by the RAR.
  • the configuration unit is further configured to configure at least one group of access categories to block EACB parameters and send the parameters to the terminal device, where each group of EACB parameters corresponds to a coverage enhancement level.
  • an embodiment of the present invention provides a terminal device, including: a receiver, configured to acquire at least one set of physical random access channels that have been stored
  • PRACH configuration information where the at least one set of PRACH configuration information is carried in system information sent by the base station;
  • a processor configured to parse the at least one set of PRACH configuration information, to obtain a corresponding initial PRACH resource
  • a transmitter configured to start sending a preamble preamble from the starting PRACH resource to the base station, so that the base station establishes a connection with the terminal device according to the reamble.
  • the system message includes at least the at least one set of PRACH configuration information, where the content of the PRACH configuration information includes a preset period time and/or a preset Starting position.
  • the receiver is further configured to receive the system message from the base station;
  • the processor is further configured to calculate a path loss during signal transmission according to the downlink information, and determine a matching coverage enhancement level according to the path loss.
  • the transmitter is further configured to acquire downlink resource information sent by the base station according to a specified random access wireless network temporary identifier RA-RNTI calculation formula on the PDCCH channel;
  • the receiver is further configured to receive a random access response RAR from the base station according to the channel specified by the descrambled downlink resource information, and send the msg3 according to the repetition number corresponding to the repeated number index carried by the RAR.
  • the processor is further configured to stop sending the preamble to the base station in the preset time period if the obtained downlink resource information carries the reject accepting information, where the rejecting the acceptance information includes rejecting the accepting instruction and/or The preset time period.
  • the receiver is further configured to acquire downlink resource information of a specified downlink control information DCI format sent by the base station on a PDCCH channel, and receive RARs from the base station according to the downlink resource information of the specified DCI format, and according to The number of repetitions corresponding to the complex index carried by the RAR sends msg3.
  • the receiving, by the system message from the base station includes There are multiple sets of PRACH configuration information, and each set of PRACH configuration information corresponds to one coverage enhancement level, where
  • the processor is specifically configured to: match the corresponding PRACH configuration information according to the matched coverage enhancement level; and obtain the corresponding initial PRACH resource according to the matched PRACH configuration information.
  • the system message further includes at least one set of access categories blocking E ACB parameters, and each set of EACB parameters corresponds to a coverage enhancement level, where
  • the processor is further configured to: select a corresponding EACB parameter according to the corresponding coverage enhancement level, and further determine, according to the EACB parameter, whether the base station allows access, and the result of the EACB parameter determination is used to indicate whether to The starting PRACH resource sends a preamble to the base station according to a preset frequency.
  • the processor is further configured to: if the result of the EACB parameter determination is that access is allowed, perform an enhanced access reject EAB decision and/or an ACB decision, where the result of the EAB decision and/or the ACB decision is used to indicate whether Sending a preamble to the base station according to a preset frequency from the starting PRACH resource.
  • an embodiment of the present invention provides a base station, including:
  • a processor configured to pre-configure a physical random access channel PRACH resource, and generate at least one set of PRACH configuration information to be sent to the terminal device, so that the terminal device acquires the at least one set of PRACH configuration information;
  • the terminal device matches the corresponding initial PRACH resource according to the at least one set of PRACH configuration information, where the content of the PRACH configuration information includes a preset cycle time and/or a preset start location;
  • a receiver configured to receive a preamble from the terminal device, and perform scrambling on a downlink resource information corresponding to the initial PRACH resource according to a calculation formula of a specified random access wireless network temporary identifier R A-RNT I;
  • a transmitter configured to send the scrambled downlink resource information to the terminal device on the PDCCH channel, so that the terminal device acquires the scrambled downlink resource information on the PDCCH channel and calculates according to the specified RA-RNTI
  • the formula descrambles the downlink resource information.
  • the transmitter is further configured to send a random access response RAR to the terminal device, so that the terminal device sends the msg3 according to the repetition number corresponding to the repetition number index carried by the RAR.
  • the receiver is further configured to send the reject accepting information to the terminal device on the PDCCH channel, so that the terminal device stops sending the preamble within a preset time period, where the reject accepting information includes rejecting the accepting instruction and / or the preset time period.
  • the transmitter is further configured to send downlink resource information of the specified downlink control information DCI format to the terminal device on the PDCCH channel, so that the terminal device receives downlink resource information of the specified DCI format; and waits After the preset processing time, the random access response RAR is sent to the terminal device, so that the terminal device sends the msg3 according to the repetition number corresponding to the repetition number index carried by the RAR.
  • the processor is further configured to configure at least one set of access categories to block EACB parameters and send the parameters to the terminal device, where each set of EACB parameters corresponds to one coverage enhancement level.
  • an embodiment of the present invention provides a method for random access, including: acquiring at least one set of physical random access channel PRACH configuration information that has been stored, where the at least one set of PRACH configuration information is system information sent by a base station Carrying in the at least one set of PRACH configuration information, obtaining a corresponding start
  • the system message includes at least the at least one set of PRACH configuration information, where the content of the PRACH configuration information includes a preset cycle time and/or a preset Starting position.
  • the obtaining is already stored
  • the PRACH configuration information Before the PRACH configuration information, it also includes:
  • the path loss during signal transmission is calculated based on the downlink information, and the matched coverage enhancement level is determined according to the path loss.
  • the preamble preamble is sent from the starting PRACH resource After the base station, the method further includes:
  • the channel specified by the descrambled downlink resource information receives the random access response RAR from the base station, and sends the msg3 according to the repetition number corresponding to the repetition number index carried by the RAR.
  • the random access wireless network is specified on the PDCCH channel
  • the method further includes:
  • the preamble is stopped from being sent to the base station within a preset time period, and the reject accepting information includes rejecting the accepting instruction and/or the preset time period.
  • the preamble is sent from the starting PRACH resource After the base station, the method further includes:
  • the system message received from the base station includes multiple sets of PRACH configuration information, and each set of PRACH configuration information corresponds to one coverage enhancement level.
  • the system message from the base station further includes at least A set of access categories blocks E ACB parameters, and each set of EACB parameters corresponds to a coverage enhancement level.
  • the method before sending the reamble to the base station from the starting PRACH resource, the method further includes:
  • the determining, by the EACB parameter, whether the base station is allowed After access it also includes:
  • an enhanced access reject E AB decision and/or an ACB decision is performed, and the result of the E AB decision and/or the ACB decision is used to indicate whether to start from the initial PRACH
  • the resource sends a preamble to the base station according to a preset frequency.
  • an embodiment of the present invention provides a method for random access, including: pre-configuring a physical random access channel (PRACH) resource, and generating at least one set of PRACH configuration information, and sending the information to the terminal device, so that the terminal Obtaining, by the device, the at least one set of PRACH configuration information; and the terminal device matching the corresponding starting PRACH resource according to the at least one set of PRACH configuration information, where the PRACH configuration information is
  • the content includes a preset cycle time and/or a preset start position;
  • the method further includes:
  • the method further includes:
  • the terminal device Sending the reject accepting information to the terminal device on the PDCCH channel, so that the terminal device stops transmitting the preamble within a preset time period, where the reject accepting information includes rejecting the accepting instruction and/or the preset time period .
  • the random access response RAR is sent to the terminal device, so that the terminal device sends msg3 according to the repetition number corresponding to the repetition number index carried by the RAR.
  • the physical random access channel PRACH resource is pre-configured, And generating at least one set of PRACH configuration information Delivered to the terminal device, also includes:
  • At least one set of access categories is configured to block EACB parameters and sent to the terminal device, where each set of EAC B parameters corresponds to a coverage enhancement level.
  • An embodiment of the present invention provides a method and an apparatus for random access.
  • the base station pre-configures multiple sets of PRAC H configuration information for a terminal device that needs coverage enhancement, and sends the configuration information to the terminal device, so that the terminal device parses the P RAC H configuration information.
  • FIG. 1 is a schematic structural diagram 1 of a terminal device according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram 2 of a terminal device according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of a hardware of a mobile phone terminal according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a hardware structure of a base station according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of random access according to an embodiment of the present invention
  • FIG. 7 is a schematic flowchart of a method for random access according to an embodiment of the present invention
  • FIG. 8 is a schematic flowchart of a method for random access according to an embodiment of the present invention.
  • the terminal device which may be a wireless terminal or a wired terminal, may be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device connected to the wireless modem.
  • the wireless terminal can communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and with a mobile terminal Computer.
  • a radio access network eg, RAN, Radio Access Network
  • a base station can refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface.
  • the base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), the invention is not limited.
  • Embodiments of the present invention are applied to a wireless communication system including at least a terminal device and a base station.
  • An embodiment of the present invention provides a method and an apparatus for random access.
  • the base station pre-configures multiple sets of PRACH configuration information for a terminal device that needs coverage enhancement, and sends the configuration to the terminal device, so that the terminal device parses the PRACH configuration information to obtain a corresponding
  • the initial PRACH resource further sends a preamble to the base station, so that the base station establishes a connection with the terminal device according to the preamb 1 e, so that the base station identifies the access request that needs to cover the enhanced terminal device without affecting the connection of other terminal devices.
  • An embodiment of the present invention provides a terminal device, as shown in FIG. 1, including: The first obtaining unit 01 is configured to acquire at least one set of physical random access channel PRACH configuration information that is stored, where the at least one set of PRACH configuration information is carried in system information sent by the base station;
  • the processing unit 02 is configured to parse the at least one set of PRACH configuration information to obtain a corresponding initial PRACH resource;
  • the first sending unit 03 is configured to start sending a preamble preamble to the base station from the starting PRACH resource, so that the base station establishes a connection with the terminal device according to the reamble.
  • system message includes at least the at least one set of PRACH configuration information, where the content of the PRACH configuration information includes a preset cycle time and/or a preset start location.
  • the first acquiring unit 01 is further configured to receive the system message from the base station;
  • the processing unit 02 is further configured to calculate a path loss in a signal transmission process according to the downlink information, and determine a matching coverage enhancement level according to the path loss.
  • the first acquiring unit 01 is further configured to acquire downlink resource information sent by the base station according to the specified random access radio network temporary identifier RA-RNTI calculation formula on the PDCCH channel, and according to the descrambled downlink resource information.
  • the designated channel receives the random access response RAR from the base station, and sends msg3 according to the number of repetitions corresponding to the repetition number index carried by the RAR.
  • the terminal device further includes:
  • the determining unit 04 is configured to stop sending the preamble to the base station in the preset time period if the obtained downlink resource information carries the reject accepting information, where the reject accepting information includes rejecting the accepting instruction and/or the Preset time period.
  • the first acquiring unit 01 is further configured to acquire downlink resource information of the specified downlink control information DCI format sent by the base station on the PDCCH channel;
  • the first sending unit 03 is further configured to receive the RAR from the base station according to the downlink resource information of the specified DCI format, and send the msg3 according to the repetition number corresponding to the complex index carried by the RAR. Further, the system message received from the base station includes multiple sets of PRACH configuration information, and each set of PRACH configuration information corresponds to a coverage enhancement level, where
  • the processing unit 02 is specifically configured to: match the corresponding PRACH configuration information according to the matched coverage enhancement level; and obtain the corresponding initial PRACH resource according to the matched PRACH configuration information.
  • system message from the base station further includes at least one set of access category blocking EACB parameters, and each set of EACB parameters corresponds to a coverage enhancement level, where
  • the processing unit 02 is further configured to: select a corresponding EACB parameter according to the corresponding coverage enhancement level, and further determine, according to the EACB parameter, whether the base station allows access, and the result of the EACB parameter determination is used to indicate whether The starting PRACH resource sends a preamble to the base station according to a preset frequency.
  • the determining unit 04 is further configured to: if the result of the EACB parameter determination is that access is allowed, perform an enhanced access reject EAB decision and/or an ACB decision, and the result of the EAB decision and/or the ACB decision And configured to indicate whether a preamble is sent to the base station according to a preset frequency from the starting PRACH resource.
  • An embodiment of the present invention provides a terminal device, by acquiring at least one set of physical random access channel PRACH configuration information that is stored, where the at least one set of PRACH configuration information is carried in system information sent by a base station; A set of PRACH configuration information is parsed to obtain a corresponding initial PRACH resource.
  • the preamble preamble is sent from the starting PRACH resource to the base station, so that the base station establishes a connection with the terminal device according to the preamble.
  • the base station pre-configures multiple sets of PRACH configuration information for the terminal device that needs to be enhanced by the coverage, and sends the information to the terminal device, so that the terminal device parses the PRACH configuration information, obtains the corresponding initial PRACH resource, and then sends the reamble to the base station. So that the base station establishes a connection with the terminal device according to the reamble, so that the base station identifies an access request that needs to cover the enhanced terminal device without affecting access of other terminal devices.
  • Embodiment 2 Embodiment 2
  • An embodiment of the present invention provides a base station, as shown in FIG. 3, including:
  • the configuration unit 11 is configured to pre-configure the physical random access channel PRACH resource, and generate at least one set of PRACH configuration information to be sent to the terminal device, so that the terminal device acquires the at least one set of PRACH configuration information;
  • the terminal device matches the corresponding initial PRACH resource according to the at least one set of PRACH configuration information, where the content of the PRACH configuration information includes a preset cycle time and/or a preset start location;
  • the second obtaining unit 12 is configured to receive a preamble from the terminal device, and perform scrambling on a downlink resource information corresponding to the initial PRACH resource according to a calculation formula of a specified random access wireless network temporary identifier R A-RNT I ;
  • the second sending unit 13 is configured to send the scrambled downlink resource information to the terminal device on the PDCCH channel, so that the terminal device acquires the scrambled downlink resource information on the PDCCH channel and according to the specified RA
  • the -RNTI calculation formula descrambles the downlink resource information.
  • the second sending unit 13 is further configured to send a random access response RAR to the terminal device, so that the terminal device sends the msg3 according to the repetition number corresponding to the repeated number index carried by the RAR.
  • the second sending unit 13 is further configured to send the reject accepting information to the terminal device on the PDCCH channel, so that the terminal device stops sending the preamble within a preset time period, where the rejecting is accepted.
  • the information includes a refusal to accept the instruction and/or the preset time period.
  • the second sending unit 13 is further configured to send downlink resource information of the specified downlink control information DCI format to the terminal device on the PDCCH channel, so that the terminal device receives the specified DCI format.
  • the downlink resource information and after waiting for the preset processing time, sending a random access response RAR to the terminal device, so that the terminal device sends the msg3 according to the repetition number corresponding to the repetition number index carried by the RAR.
  • configuration unit 11 is further configured to configure at least one group of access categories to block EACB parameters and send the parameters to the terminal device, where each group of EACB parameters corresponds to A coverage enhancement level.
  • An embodiment of the present invention provides a base station, by acquiring at least one set of physical random access channel PRACH configuration information that is stored, where the at least one set of PRACH configuration information is carried in system information sent by a base station;
  • the group PRACH configuration information is parsed to obtain a corresponding initial PRACH resource.
  • the preamble preamble is sent from the starting PRACH resource to the base station, so that the base station establishes a connection with the terminal device according to the preamble.
  • the base station pre-configures multiple sets of PRACH configuration information for the terminal device that needs to be enhanced by the coverage, and sends the information to the terminal device, so that the terminal device parses the PRACH configuration information, obtains the corresponding initial PRACH resource, and then sends the reamble to the base station. So that the base station establishes a connection with the terminal device according to the reamble, so that the base station identifies an access request that needs to cover the enhanced terminal device without affecting access of other terminal devices.
  • Embodiment 3 Embodiment 3
  • FIG. 4 is a block diagram showing the hardware of the terminal device of the present invention:
  • the terminal device can be a mobile phone, a PC, an electric meter, a water meter, etc., and the mobile phone terminal is used as an example:
  • the mobile phone terminal includes a receiver 101, a processor 102, and a transmitter as shown in FIG.
  • the processor 101 of the mobile terminal is a control center of the mobile terminal, and performs various functions and processing data of the mobile terminal by running or executing a software program and/or module of the memory.
  • the transceiver module 101, 103 can be used for receiving and transmitting signals during the transmission or reception of information or during a call.
  • the downlink information of the base station is received and processed by the processor 102.
  • the designed uplink data is sent to Base station.
  • the transceiver modules 101, 103 can communicate with the network and other devices via wireless communication.
  • the wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), GPRS (General Packet Radio Service), CDMA (Code Division). Multiple Access, Code Division Multiple Access), WCDMA (Wideband Code Division Multiple Access), LTE (Long Term Evo 1 uti on, Long Term Evolution), Electronic by P, SMS (Short Messaging Service, Short Message Month) Good service, etc.
  • the receiver 101 is configured to acquire at least one set of physical random access channel (PRACH) configuration information that has been stored, where the at least one set of PRACH configuration information is carried in system information sent by the base station;
  • the processor 102 is configured to parse the at least one set of PRACH configuration information to obtain a corresponding initial PRACH resource.
  • the transmitter 103 is configured to start sending a preamble preamble from the starting PRACH resource.
  • the base station is configured to enable the base station to establish a connection with the terminal device according to the reamble.
  • system message includes at least the at least one set of PRACH configuration information, where the content of the PRACH configuration information includes a preset cycle time and/or a preset start location.
  • the receiver 101 is further configured to receive the system message from the base station;
  • the processor 102 is further configured to calculate a path loss in a signal transmission process according to the downlink information, and determine a matching coverage enhancement level according to the path loss.
  • the transmitter 103 is further configured to acquire downlink resource information sent by the base station according to the specified random access radio network temporary identifier RA-RNTI calculation formula on the PDCCH channel;
  • the receiver 101 is further configured to receive a random access response RAR from the base station according to the channel specified by the descrambled downlink resource information, and send the msg3 according to the repetition number corresponding to the repetition number index carried by the RAR. .
  • the processor 102 is further configured to stop sending the preamble to the base station in the preset time period if the received downlink resource information carries the reject acceptance information, where the rejecting the acceptance information includes rejecting the acceptance The instruction and/or the preset time period.
  • the receiver 101 is further configured to acquire downlink resource information of a specified downlink control information DCI format sent by the base station on a PDCCH channel;
  • the downlink resource information in the specified DCI format receives the RAR from the base station, and sends the msg3 according to the number of repetitions corresponding to the complex index carried by the RAR.
  • the system message received from the base station includes multiple sets of PRACH configuration information, and each set of PRACH configuration information corresponds to a coverage enhancement level, where
  • the processor 102 is specifically configured to: match the corresponding PRACH configuration information according to the matched coverage enhancement level; and obtain the corresponding initial PRACH resource according to the matched PRACH configuration information.
  • system message from the base station further includes at least one set of access category blocking EACB parameters, and each set of EACB parameters corresponds to a coverage enhancement level, where
  • the processor 102 is further configured to: select a corresponding EACB parameter according to the corresponding coverage enhancement level, and further determine, according to the EACB parameter, whether the base station allows access, and the result of the EACB parameter determination is used to indicate whether The starting PRACH resource sends a preamble to the base station according to a preset frequency.
  • the processor 102 is further configured to perform an enhanced access rejection EAB decision and/or an ACB decision, the result of the EAB decision and/or the ACB decision, if the result of the EACB parameter determination is that access is allowed. And configured to indicate whether a preamble is sent to the base station according to a preset frequency from the starting PRACH resource.
  • An embodiment of the present invention provides a terminal device, by acquiring at least one set of physical random access channel PRACH configuration information that is stored, where the at least one set of PRACH configuration information is carried in system information sent by a base station; A set of PRACH configuration information is parsed to obtain a corresponding initial PRACH resource.
  • the preamble preamble is sent from the starting PRACH resource to the base station, so that the base station establishes a connection with the terminal device according to the preamble.
  • the base station pre-configures multiple sets of PRACH configuration information for the terminal device that needs to be enhanced by the coverage, and sends the information to the terminal device, so that the terminal device parses the PRACH configuration information, obtains the corresponding initial PRACH resource, and then sends the reamble to the base station. So that the base station establishes a connection with the terminal device according to the reamble, so that the base station identifies that the enhanced terminal device needs to be covered. The access request does not affect the access of other terminal devices at the same time.
  • Embodiment 4 Embodiment 4
  • FIG. 5 is a hardware diagram of a base station of the present invention:
  • the base station includes a processor 201, a receiver 202, and a transmitter 203 as shown in FIG.
  • the processor 201 is configured to pre-configure a physical random access channel PRACH resource, and generate at least one set of PRACH configuration information, and send the information to the terminal device, so that the terminal device acquires the at least one set of PRACH configurations.
  • the terminal device matches the corresponding initial PRACH resource according to the at least one set of PRACH configuration information, where the content of the PRACH configuration information includes a preset cycle time and/or a preset start location; the receiver 202 And receiving the preamble from the terminal device, and scrambling the downlink resource information corresponding to the initial PRACH resource according to a specified random access radio network temporary identifier RA-RNTI calculation formula; the transmitter 203, And transmitting, by using the PDCCH channel, the scrambled downlink resource information to the terminal device, so that the terminal device acquires the scrambled downlink resource information on the PDCCH channel, and according to the specified RA-RNTI calculation formula Describe the downlink resource information for descrambling.
  • the transmitter 203 is further configured to send a random access response RAR to the terminal device, so that the terminal device sends the msg3 according to the repetition number corresponding to the repetition number index carried by the RAR.
  • the receiver 202 is further configured to send the reject accepting information to the terminal device on the PDCCH channel, so that the terminal device stops sending the preamble within a preset time period, where the reject accepting information includes The instruction and/or the preset time period are rejected.
  • the transmitter 203 is further configured to send the downlink resource information of the specified downlink control information DCI format to the terminal device on the PDCCH channel, so that the terminal device receives the downlink resource in the specified DCI format.
  • the random access response RAR is sent to the terminal device, so that the terminal device sends the msg3 according to the repetition number corresponding to the repetition number index carried by the RAR.
  • the processor 201 is further configured to configure at least one group of access categories to block EACB parameters and send the parameters to the terminal device, where each group of EACB parameters corresponds to one coverage enhancement level.
  • An embodiment of the present invention provides a terminal device, by acquiring at least one set of physical random access channel PRACH configuration information that is stored, where the at least one set of PRACH configuration information is carried in system information sent by a base station; A set of PRACH configuration information is parsed to obtain a corresponding initial PRACH resource.
  • the preamble preamble is sent from the starting PRACH resource to the base station, so that the base station establishes a connection with the terminal device according to the preamble.
  • the base station pre-configures multiple sets of PRACH configuration information for the terminal device that needs to be enhanced by the coverage, and sends the information to the terminal device, so that the terminal device parses the PRACH configuration information, obtains the corresponding initial PRACH resource, and then sends the reamble to the base station. So that the base station establishes a connection with the terminal device according to the reamble, so that the base station identifies an access request that needs to cover the enhanced terminal device without affecting access of other terminal devices.
  • Embodiment 5 Embodiment 5
  • An embodiment of the present invention provides a method for random access. As shown in FIG. 6, the method includes: 301.
  • a terminal device acquires at least one set of physical random access channels that have been stored.
  • the at least one set of the PRACH configuration information is carried in the system information sent by the base station, and the content of the PRACH configuration information includes a preset cycle time and/or a preset start position.
  • the terminal device when the terminal device needs to perform random access, it is preferred to select a random access code, and then select a PRACH (physical random access channel), and the PRACH selection is based on the PRACH configuration in the system information. . Then, the UE sends the selected random access code on the selected PRACH, and starts to try to obtain the random access response sent by the base station after the three subframes.
  • the random access response is scheduled by masking the RA-RNTI through the PDCCH. .
  • the first sub-frame has a value range of [0, 10).
  • the f_id is the index of the PRACH corresponding to the subframe in which the PRACH is selected. The index is in ascending order in the frequency domain, and the value ranges from [0, 6).
  • the base station specifically configures the PRACH configuration information for the terminal device that needs coverage enhancement, so that the terminal device sends the preamble to the base station according to the corresponding PRACH starting resource.
  • the content of the PRACH configuration information may be one or more of the following: a. preset period;
  • the starting position is a starting frequency
  • the starting position is a starting time, and the starting time is represented by a frame offset;
  • start position being a start frequency and a start time, the start time being represented by a frame offset
  • the starting position is a starting frequency and a starting time, and the starting time is represented by a frame offset and a subframe number.
  • the system message may be received from the base station; and then the path loss in the signal transmission process is calculated according to the downlink information, and the matching coverage is determined according to the path loss.
  • Enhanced level The system message may carry multiple sets of PRACH configuration information, and each set of PRACH configuration information corresponds to one coverage enhancement level. After the terminal device estimates the path loss based on the estimation of the path loss, the matching coverage enhancement level is determined, and then the PRACH configuration information corresponding to the level is applied.
  • the terminal device parses at least one set of PRACH configuration information to obtain a corresponding initial PRACH resource.
  • the terminal device parses the at least one set of PRACH configuration information, and obtains the corresponding initial PRACH resource.
  • the terminal device can obtain multiple sets of PRACH configuration information, and obtain corresponding multiple sets of starting PRACH resources.
  • PRACH physical random access channel
  • the initial PRACH resource selected by the terminal device can only be the first PRACH resource in the frame with the system frame number modulo period 0, or the initial PRACH resource selected by the terminal device can only The first PRACH resource in an even frame whose system frame number is modulo 0;
  • the starting PRACH resource selected by the terminal device can only correspond to the starting frequency in the frame with the system frame number modulo period being 0.
  • the PRAC H resource, or the starting PRAC H resource selected by the terminal device can only be the PRACH resource corresponding to the starting frequency in the even frame of the system frame number modulo period 0;
  • the starting PRACH resource selected by the terminal device can only be a system frame number.
  • the period is the first PRACH resource in the frame offset, or the starting PRACH resource selected by the terminal device can only be the first PRACH resource in the even frame whose system frame number modulo period is the frame offset;
  • the initial PRAC H resource selected by the terminal device can only The PRACH resource in the subframe corresponding to the subframe number in the frame whose frame modulo period is the frame offset, or the starting PRACH resource selected by the terminal device can only be the even number of the system frame modulo period as the frame offset.
  • a PRACH resource in a subframe corresponding to the subframe number in the frame is a preset period and a start position, where the start position is a start time, and the start time is represented by a frame offset and a subframe number
  • the initial PRAC H resource selected by the terminal device can only The PRACH resource in the subframe corresponding to the subframe number in the frame whose frame modulo period is the frame offset, or the starting PRACH resource selected by the terminal device can only be the even number of the system frame modulo period as the frame offset.
  • the initial PRACH resource selected by the terminal device can only be The system frame number modulo period is the PRAC H resource corresponding to the starting frequency in the frame offset, or the starting PRACH resource selected by the terminal device can only be the starting frequency in the even frame of the system frame number modulo period being the frame offset.
  • Corresponding PRACH resource when the PRACH configuration information is a preset period and a start position, where the start position is a start frequency and a start time, and the start time is represented by a frame offset and a subframe number, the terminal device
  • the selected starting PRACH resource can only be in the frame with the system frame number modulo period being the frame offset.
  • the PRACH resource corresponding to the start frequency in the subframe corresponding to the subframe number, or the start PRACH resource selected by the terminal device can only correspond to the subframe number in the even frame of the system frame modulo period being the frame offset
  • the starting frequency (frequency offset) in the subframe corresponds to the PRACH resource.
  • the terminal device parses at least one set of PRACH configuration information to obtain a corresponding initial PRACH resource.
  • the terminal device starts sending the preamble preamble to the base station from the starting PRACH resource, so that the base station establishes a connection with the terminal device according to the preamble.
  • the terminal device After the terminal device obtains the corresponding initial PRACH resource, the terminal device starts to repeatedly send the preamble reamble to the base station according to the calculated transmit power of the preamble from the initial PRACH resource.
  • the selection of the transmit power of the preamble by the terminal device may be selected to be sent by using the preset maximum transmit power, or
  • the terminal device calculates the transmit power of the preamble based on the path loss calculation and the corresponding coverage enhancement level selection.
  • the terminal device may further obtain the downlink resource information sent by the base station according to the specified random access radio network temporary identifier RA-RNTI calculation formula on the PDCCH channel. And receiving a random access response RAR from the base station according to the channel specified by the descrambled downlink resource information, and sending the ms g 3 according to the repetition number corresponding to the repetition number index carried by the RAR.
  • the specified RA-RNTI calculation formula may be:
  • RA-RNTI l+t-id+10*f_id+X
  • t_id and f_id are the first PRACH resource used in the repeated transmission of the preamble, or the last PRACH resource.
  • the system message can carry multiple sets of PRACH configuration information, and each set of PRACH configuration information corresponds to one coverage enhancement level, when the terminal equipment calculates the RA-RNTI, it corresponds to multiple different coverage enhancement levels.
  • the RA-RNTI may also indicate the RA corresponding to the coverage enhancement level by means of the manner configured in the system information, that is, the RA-RNTI of the corresponding terminal equipment is carried in the system information. -RNTI.
  • An embodiment of the present invention provides a method for random access, as shown in FIG. 7, including:
  • the base station pre-configures the physical random access channel PRACH resource, and generates at least one set of PRACH configuration information to be sent to the terminal device, so that the terminal device acquires at least one set of PRACH configuration information; and the terminal device is configured according to at least one group of PRACHs.
  • the information matches the corresponding initial PRACH resource, and the content of the PRACH configuration information includes a preset cycle time and/or a preset start position.
  • An embodiment of the present invention provides a method and an apparatus for random access.
  • the base station pre-configures multiple sets of PRACH configuration information for a terminal device that needs coverage enhancement, and sends the configuration to the terminal device, so that the terminal device parses the PRACH configuration information to obtain a corresponding
  • the initial PRACH resource further sends a preamble to the base station, so that the base station establishes a connection with the terminal device according to the preamb 1 e, so that the base station identifies the access request that needs to cover the enhanced terminal device without affecting the connection of other terminal devices.
  • the content of the PRACH configuration information may be one or more of the following: a. preset period;
  • the starting position is a starting frequency
  • the starting position is a starting time, and the starting time is represented by a frame offset;
  • start position being a start frequency and a start time, the start time being represented by a frame offset
  • the starting position is a starting frequency and a starting time, and the starting time is represented by a frame offset and a subframe number.
  • the terminal device Before the terminal device acquires the PRACH configuration information, Receiving the system message from the base station; and further calculating a path loss during signal transmission according to the downlink information, and determining a matching coverage enhancement level according to the path loss.
  • the system message may carry multiple sets of PRACH configuration information, and each set of PRACH configuration information corresponds to one coverage enhancement level. After the terminal device estimates the path loss based on the estimation of the path loss, the matching coverage enhancement level is determined, and then the PRACH configuration information corresponding to the level is applied.
  • the base station receives the preamble from the terminal device, and performs power interference on the downlink resource information corresponding to the initial PRACH resource according to the RA-RNTI calculation formula of the specified random access wireless network temporary identifier.
  • the specified RA-RNTI calculation formula may be:
  • RA-RNTI l+t-id+10*f_id+X
  • t_id and f_id are the first PRACH resource used in the repeated transmission of the preamble, or the last PRACH resource.
  • the system message can carry multiple sets of PRACH configuration information, and each set of PRACH configuration information corresponds to one coverage enhancement level, when the terminal equipment calculates the RA-RNTI, it corresponds to multiple different coverage enhancement levels.
  • the RA-RNTI may also indicate the RA corresponding to the coverage enhancement level by means of the manner configured in the system information, that is, the RA-RNTI of the corresponding terminal equipment is carried in the system information. -RNTI.
  • the base station sends the scrambled downlink resource information to the terminal device on the PDCCH channel, so that the terminal device obtains the scrambled downlink resource information on the PDCCH channel, and performs descrambling on the downlink resource information according to the specified RA-RNTI calculation formula. .
  • the base station after receiving the reamble, the base station sends a PDCCH of the RA-RNTI to perform the interference, and after the PDCCH is sent, the RAR (Random Access Response) is sent after a processing time. Carry the index of the number of repetitions of ms g 3 .
  • the terminal After the terminal receives the RAR, after a processing time, it starts to follow the The number of repetitions corresponding to the repetition number index, occupying the uplink authorization resource indicated in the RAR to send msg3 0
  • An embodiment of the present invention provides a method for random access, by acquiring at least one set of physical random access channel PRACH configuration information that is already stored, where the at least one set of PRACH configuration information is carried in system information sent by a base station; The at least one set of PRACH configuration information is parsed to obtain a corresponding initial PRACH resource, and the preamble preamble is sent from the starting PRACH resource to the base station, so that the base station establishes a connection with the terminal device according to the preamble.
  • the base station pre-configures multiple sets of PRACH configuration information for the terminal device that needs to be enhanced by the coverage, and sends the information to the terminal device, so that the terminal device parses the PRACH configuration information, obtains the corresponding initial PRACH resource, and then sends the reamble to the base station. So that the base station establishes a connection with the terminal device according to the reamble, so that the base station identifies an access request that needs to cover the enhanced terminal device without affecting access of other terminal devices.
  • An embodiment of the present invention provides a method for random access, as shown in FIG. 8, including:
  • the terminal device pre-configures the physical random access channel PRACH resource, and generates a system message to be sent to the terminal device.
  • An embodiment of the present invention provides a method and an apparatus for random access.
  • the base station pre-configures multiple sets of PRACH configuration information for a terminal device that needs coverage enhancement, and sends the configuration to the terminal device, so that the terminal device parses the PRACH configuration information to obtain a corresponding
  • the initial PRACH resource further sends a preamble to the base station, so that the base station establishes a connection with the terminal device according to the preamb 1 e, so that the base station identifies the access request that needs to cover the enhanced terminal device without affecting the connection of other terminal devices.
  • the at least one set of the PRACH configuration information is carried in the system information sent by the base station, and the content of the PRACH configuration information includes a preset cycle time and/or a preset start position.
  • the content of the PRACH configuration information may be one or more of the following: a. a preset period; b. preset period and starting position, the starting position is a starting frequency; c. a preset period and a starting position, the starting position is a starting time, and the starting time is represented by a frame offset ;
  • start position being a start frequency and a start time, the start time being represented by a frame offset
  • a preset period and a start position the start position being a start frequency and a start time, the start time being represented by a frame offset and a subframe number.
  • the system message may be received from the base station; and then the path loss in the signal transmission process is calculated according to the downlink information, and the matching coverage is determined according to the path loss.
  • Enhanced level The system message may carry multiple sets of PRACH configuration information, and each set of PRACH configuration information corresponds to one coverage enhancement level. After the terminal device estimates the path loss based on the estimation of the path loss, the matching coverage enhancement level is determined, and then the PRACH configuration information corresponding to the level is applied.
  • the terminal device calculates a path loss in the signal transmission process according to the downlink information, and determines a matching coverage enhancement level according to the path loss.
  • the terminal device receives the system message from the base station; and further calculates a path loss in the signal transmission process according to the downlink information, and determines a matching coverage enhancement level according to the path loss.
  • the system message may carry multiple sets of PRAC H configuration information, and each set of PRAC H configuration information corresponds to one coverage enhancement level.
  • the terminal device estimates the path coverage based on the estimation of the path loss, the matching coverage enhancement level is determined, and then the PRACH configuration information corresponding to the level is applied.
  • the terminal device can calculate the transmit power of p r eamb l e based on the path loss calculation and the selection of the corresponding coverage enhancement level.
  • the terminal device acquires at least one set of physical random access channels that have been stored, PRACH.
  • the terminal device parses at least one set of PRAC H configuration information to obtain a corresponding The starting PRACH resource.
  • the terminal device parses the at least one set of PRACH configuration information, and obtains the corresponding initial PRACH resource.
  • the terminal device can obtain multiple sets of PRACH configuration information, and obtain corresponding sets of initial PRAC H resources.
  • step 301 Preferably, corresponding to step 301,
  • the initial PRACH resource selected by the terminal device can only be the first PRACH resource in the frame with the system frame number modulo period 0, or the initial PRACH resource selected by the terminal device can only The first PRACH resource in an even frame whose system frame number is modulo 0;
  • the starting PRACH resource selected by the terminal device can only correspond to the starting frequency in the frame with the system frame number modulo period being 0.
  • the PRAC H resource, or the starting PRAC H resource selected by the terminal device can only be the PRACH resource corresponding to the starting frequency in the even frame of the system frame number modulo period 0;
  • the starting PRACH resource selected by the terminal device can only be a system frame number.
  • the period is the first PRACH resource in the frame offset, or the starting PRACH resource selected by the terminal device can only be the first PRACH resource in the even frame whose system frame number modulo period is the frame offset;
  • the initial PRAC H resource selected by the terminal device can only The PRACH resource in the subframe corresponding to the subframe number in the frame whose frame modulo period is the frame offset, or the starting PRACH resource selected by the terminal device can only be the even number of the system frame modulo period as the frame offset.
  • a PRACH resource in a subframe corresponding to the subframe number in the frame is a preset period and a start position, where the start position is a start time, and the start time is represented by a frame offset and a subframe number
  • the initial PRAC H resource selected by the terminal device can only The PRACH resource in the subframe corresponding to the subframe number in the frame whose frame modulo period is the frame offset, or the starting PRACH resource selected by the terminal device can only be the even number of the system frame modulo period as the frame offset.
  • the initial PRACH resource selected by the terminal device can only be The system frame number modulo period is the starting frequency pair in the frame offset
  • the PRACH resource, or the starting PRACH resource selected by the terminal device can only be the PRACH resource corresponding to the starting frequency in the even frame of the system frame modulo period of the frame offset;
  • the PRACH configuration information is the preset period and a start position, where the start position is a start frequency and a start time, and when the start time is represented by a frame offset and a subframe number
  • the starting PRACH resource selected by the terminal device can only be the system frame number modulo period
  • the PRACH resource corresponding to the start frequency in the subframe corresponding to the subframe number in the frame offset frame, or the initial PRACH resource selected by the terminal device can only be in the even frame of the system frame number modulo period as the frame offset
  • the terminal device starts sending the preamble preamble to the base station from the starting PRACH resource, so that the base station establishes a connection with the terminal device according to the preamble.
  • the terminal device After the terminal device obtains the corresponding initial PRACH resource, the terminal device starts to repeatedly send the preamble reamble to the base station according to the calculated transmit power of the preamble from the initial PRACH resource.
  • the system message from the base station further includes at least one set of access class blocking E ACB parameters, and each set of EACB parameters corresponds to one coverage enhancement level.
  • the terminal device selects a corresponding EACB parameter according to the corresponding coverage enhancement level, and further determines, according to the EACB parameter, whether the base station allows access, if To determine that access is allowed, the terminal device sends the preamble reamble to the base station.
  • the terminal device may further perform an enhanced access reject EAB decision and/or an ACB decision, and the result of the EAB decision and/or the ACB decision is used to indicate whether to The starting PRACH resource sends a reamble to the base station according to a preset frequency.
  • the base station receives the preamble from the terminal device, and performs power interference on the downlink resource information corresponding to the initial PRACH resource according to the RA-RNTI calculation formula of the specified random access wireless network temporary identifier.
  • the terminal device After the terminal device starts transmitting the preamble preamble from the starting PRACH resource to the base station, the terminal device may also randomly access the wireless network according to the designated PDCCH channel.
  • the temporary identifier RA-RNTI calculation formula acquires the downlink resource information sent by the base station; and receives the random access response RAR from the base station according to the channel specified by the descrambled downlink resource information, and according to the number of repetitions carried by the RAR The number of repetitions corresponding to the index is sent to msg3 0
  • the specified RA-RNTI calculation formula may be:
  • RA-RNTI l+t-id+10*f_id+X
  • t_id and f_id are the first PRACH resource used in the repeated transmission of the preamble, or the last PRACH resource.
  • the system message can carry multiple sets of PRACH configuration information, and each set of PRACH configuration information corresponds to one coverage enhancement level, when the terminal equipment calculates the RA-RNTI, it corresponds to multiple different coverage enhancement levels.
  • the RA-RNTI may also indicate the RA corresponding to the coverage enhancement level by means of the manner configured in the system information, that is, the RA-RNTI of the corresponding terminal equipment is carried in the system information. -RNTI.
  • the terminal device acquires downlink resource information sent by the base station according to the RA-RNTI calculation formula of the specified random access radio network temporary identifier on the PDCCH channel.
  • the RA-RNTI calculation formula is the same as the RA-RNTI calculation formula in step 206.
  • the base station after the base station acquires the preamble sent by the terminal device, the base station sends the downlink resource information by using the specified downlink control information DCI format, because the specified downlink control information DCI format can only be parsed by the terminal device that needs to be enhanced by the coverage, so the normal terminal The device cannot parse the specified downlink control information in the PDCCH to send downlink resource information in the DCI format, so it does not affect the normal terminal device to receive the corresponding RAR.
  • the terminal device stops sending the preamble to the base station within a preset time period, and the rejecting the acceptance information includes rejecting the accepting instruction and/or the Preset time period.
  • the refusal to accept the information includes the refusal to accept the instruction and the preset time period of 1 minute, the terminal device does not initiate the coverage enhanced access request within 1 minute after the refusal to accept the information.
  • the terminal device stops sending the preamble to the base station within a preset time period”, and does not depend on step 501- 506, can be executed separately.
  • the base station sends a random access response RAR to the terminal device.
  • the system information sent by the base station may further include configuration information for receiving the RAR, where the content of the configuration information of the received RAR is a time-frequency resource corresponding to the RAR, and after the terminal device sends the preamble, receiving the RAR according to the The configuration information receives the RAR in the corresponding time-frequency resource, and does not need to acquire the downlink resource information sent by the base station according to the specified random access radio network temporary identifier RA-RNTI calculation formula on the PDCCH channel.
  • the terminal device receives the random access response RAR from the base station, and sends the msg3 according to the repetition number corresponding to the repetition number index carried by the RAR.
  • the terminal device obtains the corresponding initial PRACH resource and then sends the reamble to the base station, so that the base station establishes a connection with the terminal device according to the preamble, so that the base station identifies the access request that needs to cover the enhanced terminal device, and does not affect other Access to the terminal device.
  • An embodiment of the present invention provides a method for random access, by acquiring at least one set of physical random access channel PRACH configuration information that is already stored, where the at least one set of PRACH configuration information is carried in system information sent by a base station; The at least one set of PRACH configuration information is parsed to obtain a corresponding initial PRACH resource, and the preamble preamble is sent from the starting PRACH resource to the base station, so that the base station establishes a connection with the terminal device according to the preamble.
  • the base station pre-configures multiple sets of PRACH configuration information for the terminal device that needs to be enhanced by the coverage, and sends the information to the terminal device, so that the terminal device parses the PRACH configuration information, obtains the corresponding initial PRACH resource, and then sends the reamble to the base station. So that the base station establishes a connection with the terminal device according to the reamble, so that the base station identifies that the enhanced terminal device needs to be covered. The access request does not affect the access of other terminal devices at the same time.
  • a method for improving random access efficiency for a specified service includes:
  • the terminal device receives a network congestion indication carried in the broadcast information sent by the base station or a backoff parameter of the specified service.
  • the network congestion refers to a situation in which network transmission performance is degraded due to limited resources of the storage and forwarding node when the number of packets transmitted in the packet switched network is too large.
  • data loss usually occurs. The delay is increased and the throughput is decreased. In severe cases, it may even cause "congestion collapse”. 0
  • Network congestion will occur.
  • the backoff parameter of the specified service may include backoff parameters for access use of high priority access, emergency call, IMS voice, and IMS video.
  • the embodiment of the present invention provides a priority for a specified service (such as high priority access, emergency call, IMS voice, IMS video, etc.), and the priority of the corresponding access request is increased.
  • a specified service such as high priority access, emergency call, IMS voice, IMS video, etc.
  • the terminal device selects a corresponding PRACH resource to send a preamble preamble to the base station.
  • the access type of the preamble sent by the terminal device to the base station is one of a high priority access, an emergency call, an IMS (IP multimedia subsystem) voice, and an IMS video.
  • the terminal device triggers the specified service to send a preamble request to the base station to perform random access, and the base station determines whether to establish a connection with the terminal device after receiving the corresponding preamble, and if the base station allows the terminal device to access, sends a random access response message.
  • the RAR is sent to the terminal device, and the random access response message may include a random access code identifier corresponding to the preamble. 603.
  • the terminal device receives a random access response message sent by the base station or a network congestion indication carried in the MAC header or the MAC sub-header or a backoff parameter of the specified service.
  • the network congestion indication or the backoff parameter of the specified service may be carried in the broadcast information sent by the base station, or may be a random access response message or a MAC (Media Access Control) header or MAC sent by the base station. Carry in the subhead.
  • the MAC is to solve the problem of how to allocate the right to use the channel when the use of the shared channel in the local area network causes competition.
  • steps 601 and 603 elaborate the method for obtaining the network congestion indication or the backoff parameter of the specified service, so steps 601 and 603 may select one of them to perform.
  • the terminal device determines whether a random access code identifier corresponding to the preamble is received.
  • the terminal device does not receive the random access code identifier corresponding to the preamble, perform the specified operation according to the network congestion indication or the backoff parameter of the specified service.
  • the terminal device If the terminal device receives the network congestion indication, and the terminal device does not receive the random access code identifier corresponding to the preamble, the terminal device does not perform a backoff operation, and then continues to select an appropriate random access resource to initiate the access.
  • the terminal device If the terminal device receives the backoff parameter of the specified service, and the terminal device does not receive the random access code identifier corresponding to the preamble, the terminal device performs a backoff operation based on the backoff parameter of the specified service, and then selects an appropriate The random access resource initiates access.
  • the backoff parameter is a backoff parameter value index or a backoff parameter ratio.
  • An embodiment of the present invention provides a method for improving random access efficiency for a specified service, where a terminal device starts transmitting a preamble preamble from a starting PRACH resource to the base station; receiving a network congestion indication or a backoff parameter of a specified service; Determining whether the random access code identifier corresponding to the preamble is received; if the terminal device does not receive the random access code identifier corresponding to the preamble, performing the specified operation according to the network congestion indication or the backoff parameter of the specified service.
  • the solution performs a specified operation according to the network congestion indication or the backoff parameter of the specified service, and improves the access request corresponding to the specified service.
  • the priority is to make access to these types of services easier to succeed and enhance the user experience.
  • the user equipment which may be a wireless terminal or a wired terminal, may be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device connected to the wireless modem.
  • the wireless terminal can communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and with a mobile terminal
  • RAN Radio Access Network
  • the computers for example, can be portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile devices that exchange language and/or data with the wireless access network.
  • a wireless terminal may also be called a system, a Subscriber Unit, a Subscriber Station, a Mobile Station, a Mobile, a Remote Station, an Access Point, Remote Terminal, Access Terminal, User Terminal, User Agent, User Device, or User Equipment.
  • a base station can refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface.
  • the base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), the invention is not limited.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used. 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 shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
  • the units described as separate components may or may not be physically separated, and the components displayed as the units may or may not be physical units, and may be located in one place or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiment of the present embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods of the various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, and a read-only memory.

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Abstract

本发明的实施例提供一种随机接入的方法及装置,涉及通信领域,通过获取基站的PRACH配置信息在对应的起始PRACH资源发送preamble,使得基站识别需要覆盖增强的终端设备的接入请求同时不影响其他终端设备的接入。该方案包括:获取已经存储的至少一组物理随机接入信道PRACH配置信息,所述至少一组PRACH配置信息为基站发送的系统信息中携带的;对所述至少一组PRACH配置信息进行解析,获得对应的起始PRACH资源;从所述起始PRACH资源处开始发送前导码preamble至所述基站,以使得基站根据所述preamble建立与终端设备的连接。

Description

一种随机接入的方法及装置 技术领域
本发明涉及通信领域, 尤其涉及一种随机接入的方法及装置。 背景技术
随着科学技术的日益发展, 基站和用户设备之间的数据交互越 来越频繁, 数据交互的质量要求也随之大大提高, 这就使得用户设 备对基站发送的信号覆盖面积的要求以及信号收发质量的要求越来 越高。
然而, 有些 UE ( user equipment 终端设备) 可能处于与普通 UE相比较差的覆盖区域, 例如置于楼宇、 地下室或铁盒中的的电表、 水表等机器类型通信的终端, 这些场所的信号不是很好, 可能会有 额外最大 20dB的信号损失。 为了弥补上述信号损失, 通常釆用重复 发送 (即扩频) 的方式增强信号。
具体的, 在现有技术中, 当 UE需要执行随机接入时, 首选选择 一个随机接入码,然后基于系统信息中的 PRACH配置选择一个 PRACH ( physical random access channel , 物理随机接入信道 )。 然后 UE在所选择的 PRACH上发送选择的随机接入码, 并在 3个子帧后开 始尝试获取基站下发的随机接入响应, 随机接入响应是通过 PDCCH 力口掩 RA-RNTI (随机接入无线网络临时标识) 来调度的。
对于覆盖等级较差的 UE, 需要利用多个连续的 PRACH资源发送 相同的 preamble (前导码), 此时就会产生下面的问题: 由于 UE覆 盖等级较差, 在重复发送 preamble信号的过程中基站可能无法完整 检测到所有 preamble, 就导致基站无法准确确定 UE 重复发送 preamble的 PRACH资源的起始及结束位置, 从而无法正确接入; 另 外, 由于正常的 UE( 即不需要覆盖增强 )仍然可能选择相同的 PRACH 资源, 此时基站重复发送的 RAR ( Random Access Response, 随机 接入响应 ) 就与正常的 UE 请求得到的 RAR 发生冲突, 导致正常的 UE无法正确接入。
发明内容
本发明的实施例提供一种随机接入的方法及装置, 通过获取基 站的 PRACH配置信息进而解析对应的起始 PRACH资源发送 preamble, 使得基站识别需要覆盖增强的终端设备的接入请求同时不影响其他 终端设备的接入。
为达到上述目的, 本发明的实施例釆用如下技术方案:
第一方面, 本发明的实施例提供一种终端设备, 包括:
第一获取单元, 用于获取已经存储的至少一组物理随机接入信 道 PRACH 配置信息, 所述至少一组 PRACH 配置信息为基站发送的系 统信息中携带的;
处理单元, 用于对所述至少一组 PRACH配置信息进行解析, 获 得对应的起始 PRACH资源;
第一发送单元, 用于从所述起始 PRACH 资源处开始发送前导码 preamble 至所述基站, 以使得基站才艮据所述 reamble 建立与终端 设备的连接。
在第一方面的第一种可能的实现方式中, 所述系统消息中至少 包括所述至少一组 PRACH 配置信息, 其中, 所述 PRACH 配置信息的 内容包括预置周期时间和 /或预置起始位置。
结合前述的第一方面以及第一方面的第一种可能的实现方式, 在第一方面的第二种可能的实现方式中,
所述第一获取单元,还用于接收来自所述基站的所述系统消息; 所述处理单元, 还用于根据下行信息计算信号传输过程中的路 径损耗, 并根据所述路径损耗确定匹配的覆盖增强等级。
结合前述的第一方面以及第一方面的第一至第二种可能的实现 方式, 在第一方面的第三种可能的实现方式中,
所述第一获取单元, 还用于在 PDCCH信道上按照指定随机接入 无线网络临时标识 RA-RNTI 计算公式获取基站发送的下行资源信 息; 以及根据解扰后的下行资源信息所指定的信道接收来自所述基 站的随机接入响应 RAR, 并按照所述 RAR 携带的重复次数索引所对 应的重复次数发送 msg3。
结合前述的第一方面以及第一方面的第一至第三种可能的实现 方式, 在第一方面的第四种可能的实现方式中, 所述终端设备还包 括:
判断单元, 用于若获取到的所述下行资源信息中携带拒绝接受 信息, 则在预置时间段内停止发送 preamble至所述基站, 所述拒绝 接受信息包括拒绝接受指令和 /或所述预置时间段。
结合前述的第一方面以及第一方面的第一至第四种可能的实现 方式, 在第一方面的第五种可能的实现方式中,
所述第一获取单元, 还用于在 PDCCH信道上获取所述基站发送 的指定下行控制信息 DCI格式的下行资源信息;
所述第一发送单元, 还用于根据所述指定 DCI 格式的下行资源 信息接收来自所述基站的 RAR, 并按照所述 RAR 携带的复次数索引 所对应的重复次数发送 ms g 3。
结合前述的第一方面以及第一方面的第一至第五种可能的实现 方式, 在第一方面的第六种可能的实现方式中, 所述接收来自所述 基站的所述系统消息中包含有多组 PRACH 配置信息, 每一组 PRACH 配置信息对应一个覆盖增强等级, 其中,
所述处理单元, 具体用于根据所述匹配的覆盖增强等级匹配对 应的 PRACH 配置信息; 以及根据匹配的 PRACH 配置信息获取对应的 所述起始 PRACH资源。
结合前述的第一方面以及第一方面的第一至第六种可能的实现 方式, 在第一方面的第七种可能的实现方式中,
所述来自所述基站的所述系统消息还包括至少一组接入类别阻 止 EACB 参数, 每一组 EACB 参数对应一个覆盖增强等级, 其中, 所述处理单元, 还用于根据所述对应的覆盖增强等级选择对应 的 EACB参数, 进而根据所述 EACB参数判断所述基站是否允许接入, 所述 EACB 参数判断的结果用于指示是否从所述起始 PRACH 资源处 按照预设频率发送 preamble至所述基站。
结合前述的第一方面以及第一方面的第一至第七种可能的实现 方式, 在第一方面的第八种可能的实现方式中,
所述判断单元, 还用于若所述 EACB 参数判断的结果为允许接 入, 则执行增强接入拒绝 EAB判决和 /或 ACB判决, 所述 EAB判决和 /或 ACB判决的结果用于指示是否从所述起始 PRACH资源处按照预设 频率发送 reamble至所述基站。
第二方面, 本发明的实施例提供一种基站, 包括:
配置单元, 用于对物理随机接入信道 PRACH 资源进行预配置, 并生成至少一组 PRACH 配置信息发送至终端设备, 以使得所述终端 设备则获取所述至少一组 PRACH 配置信息; 以及所述终端设备根据 所述至少一组 PRACH 配置信息匹配对应的起始 PRACH 资源, 所述 PRACH配置信息的内容包括预置周期时间和 /或预置起始位置;
第二获取单元, 用于接收来自所述终端设备的 preamble, 并对 所述起始 PRACH 资源处对应的下行资源信息按照指定随机接入无线 网络临时标识 R A-RNT I计算公式进行加扰;
第二发送单元, 用于在 PDCCH信道上发送加扰后的下行资源信 息至所述终端设备, 以使得所述终端设备在 PDCCH 信道上获取加扰 后的下行资源信息并按照所述指定 RA-RNTI 计算公式对所述下行资 源信息进行解扰。
在第二方面的第一种可能的实现方式中,
所述第二发送单元, 还用于发送随机接入响应 RAR至所述终端 设备, 以使得所述终端设备按照所述 RAR 携带的重复次数索引所对 应的重复次数发送 msg3。
结合前述的第二方面以及第二方面的第一种可能的实现方式, 在第二方面的第二种可能的实现方式中,
所述第二发送单元, 还用于在所述 PDCCH信道上发送拒绝接受 信息至所述终端设备, 以使得所述终端设备在预置时间段内停止发 送 preamble, 所述拒绝接受信息包括拒绝接受指令和 /或所述预置 时间段。
结合前述的第二方面以及第二方面的第一至第二种可能的实现 方式, 在第二方面的第三种可能的实现方式中,
所述第二发送单元, 还用于在所述 PDCCH信道上发送指定下行 控制信息 DCI 格式的下行资源信息至所述终端设备, 以使得所述终 端设备接收所述指定 DCI 格式的下行资源信息; 以及等待预置处理 时间后, 发送随机接入响应 RAR 至所述终端设备, 以使得所述终端 设备按照所述 RAR 携带的重复次数索引所对应的重复次数发送 ms g 3。
结合前述的第二方面以及第二方面的第一至第三种可能的实现 方式, 在第二方面的第四种可能的实现方式中,
所述配置单元, 还用于配置至少一组接入类别阻止 EACB 参数 并发送至所述终端设备, 其中, 每一组 EACB 参数对应一个覆盖增 强等级。
第三方面, 本发明的实施例提供一种终端设备, 包括: 接收器, 用于获取已经存储的至少一组物理随机接入信道
PRACH 配置信息, 所述至少一组 PRACH 配置信息为基站发送的系统 信息中携带的;
处理器, 用于对所述至少一组 PRACH配置信息进行解析, 获得 对应的起始 PRACH资源;
发送器, 用 于从所述起始 PRACH 资源处开始发送前导码 preamble 至所述基站, 以使得基站才艮据所述 reamble 建立与终端 设备的连接。
在第三方面的第一种可能的实现方式中, 所述系统消息中至少 包括所述至少一组 PRACH 配置信息, 其中, 所述 PRACH 配置信息的 内容包括预置周期时间和 /或预置起始位置。
结合前述的第三方面以及第三方面的第一种可能的实现方式, 在第三方面的第二种可能的实现方式中,
所述接收器, 还用于接收来自所述基站的所述系统消息; 所述处理器, 还用于根据下行信息计算信号传输过程中的路径 损耗, 并根据所述路径损耗确定匹配的覆盖增强等级。
结合前述的第三方面以及第三方面的第一至第二种可能的实现 方式, 在第三方面的第三种可能的实现方式中,
所述发送器, 还用于在 PDCCH信道上按照指定随机接入无线网 络临时标识 RA-RNTI计算公式获取基站发送的下行资源信息;
所述接收器, 还用于根据解扰后的下行资源信息所指定的信道 接收来自所述基站的随机接入响应 RAR, 并按照所述 RAR 携带的重 复次数索引所对应的重复次数发送 msg3。
结合前述的第三方面以及第三方面的第一至第三种可能的实现 方式, 在第三方面的第四种可能的实现方式中,
所述处理器, 还用于若获取到的所述下行资源信息中携带拒绝 接受信息, 则在预置时间段内停止发送 preamble至所述基站, 所述 拒绝接受信息包括拒绝接受指令和 /或所述预置时间段。
结合前述的第三方面以及第三方面的第一至第四种可能的实现 方式, 在第三方面的第五种可能的实现方式中,
所述接收器, 还用于在 PDCCH信道上获取所述基站发送的指定 下行控制信息 DCI 格式的下行资源信息; 以及根据所述指定 DCI格 式的下行资源信息接收来自所述基站的 RAR, 并按照所述 RAR 携带 的复次数索引所对应的重复次数发送 msg3。
结合前述的第三方面以及第三方面的第一至第五种可能的实现 方式, 在第三方面的第六种可能的实现方式中, 所述接收来自所述 基站的所述系统消息中包含有多组 PRACH 配置信息, 每一组 PRACH 配置信息对应一个覆盖增强等级, 其中,
所述处理器, 具体用于根据所述匹配的覆盖增强等级匹配对应 的 PRACH 配置信息; 以及根据匹配的 PRACH 配置信息获取对应的所 述起始 PRACH资源。
结合前述的第三方面以及第三方面的第一至第六种可能的实现 方式, 在第三方面的第七种可能的实现方式中, 所述来自所述基站 的所述系统消息还包括至少一组接入类别阻止 E ACB 参数, 每一 组 EACB 参数对应一个覆盖增强等级, 其中,
所述处理器, 还用于根据所述对应的覆盖增强等级选择对应的 EACB 参数, 进而根据所述 EACB 参数判断所述基站是否允许接入, 所述 EACB 参数判断的结果用于指示是否从所述起始 PRACH 资源处 按照预设频率发送 preamble至所述基站。
结合前述的第三方面以及第三方面的第一至第七种可能的实现 方式, 在第三方面的第八种可能的实现方式中,
所述处理器, 还用于若所述 EACB参数判断的结果为允许接入, 则执行增强接入拒绝 EAB判决和 /或 ACB判决, 所述 EAB判决和 /或 ACB 判决的结果用于指示是否从所述起始 PRACH 资源处按照预设频 率发送 preamble至所述基站。
第四方面, 本发明的实施例提供一种基站, 包括:
处理器, 用于对物理随机接入信道 PRACH 资源进行预配置, 并 生成至少一组 PRACH 配置信息发送至终端设备, 以使得所述终端设 备则获取所述至少一组 PRACH 配置信息; 以及所述终端设备根据所 述至少一组 PRACH配置信息匹配对应的起始 PRACH资源,所述 PRACH 配置信息的内容包括预置周期时间和 /或预置起始位置;
接收器, 用于接收来自所述终端设备的 preamble, 并对所述起 始 PRACH 资源处对应的下行资源信息按照指定随机接入无线网络临 时标识 R A-RNT I计算公式进行加扰;
发送器, 用于在 PDCCH信道上发送加扰后的下行资源信息至所 述终端设备, 以使得所述终端设备在 PDCCH 信道上获取加扰后的下 行资源信息并按照所述指定 RA-RNTI 计算公式对所述下行资源信息 进行解扰。
在第四方面的第一种可能的实现方式中,
所述发送器, 还用于发送随机接入响应 RAR至所述终端设备, 以使得所述终端设备按照所述 RAR携带的重复次数索引所对应的重 复次数发送 msg3。 结合前述的第四方面以及第四方面的第一种可能的实现方式, 在第四方面的第二种可能的实现方式中,
所述接收器, 还用于在所述 PDCCH信道上发送拒绝接受信息至 所述终端设备, 以使得所述终端设备在预置时间段内停止发送 preamble, 所述拒绝接受信息包括拒绝接受指令和 /或所述预置时间 段。
结合前述的第四方面以及第四方面的第一至第二种可能的实现 方式, 在第四方面的第三种可能的实现方式中,
所述发送器, 还用于在所述 PDCCH信道上发送指定下行控制信 息 DCI 格式的下行资源信息至所述终端设备, 以使得所述终端设备 接收所述指定 DCI格式的下行资源信息; 以及等待预置处理时间后, 发送随机接入响应 RAR 至所述终端设备, 以使得所述终端设备按照 所述 RAR携带的重复次数索引所对应的重复次数发送 msg3。
结合前述的第四方面以及第四方面的第一至第三种可能的实现 方式, 在第四方面的第四种可能的实现方式中,
所述处理器, 还用于配置至少一组接入类别阻止 EACB 参数并 发送至所述终端设备, 其中, 每一组 EACB 参数对应一个覆盖增强 等级。
第五方面, 本发明的实施例提供一种随机接入的方法, 包括: 获取已经存储的至少一组物理随机接入信道 PRACH配置信息, 所述至少一组 PRACH配置信息为基站发送的系统信息中携带的; 对所述至少一组 PRACH 配置信息进行解析, 获得对应的起始
PRACH资源;
从所述起始 PRACH 资源处开始发送前导码 preamble 至所述基 站, 以使得基站根据所述 preamble建立与终端设备的连接。
在第五方面的第一种可能的实现方式中, 所述系统消息中至少 包括所述至少一组 PRACH 配置信息, 其中, 所述 PRACH 配置信息的 内容包括预置周期时间和 /或预置起始位置。
结合前述的第五方面以及第五方面的第一种可能的实现方式, 在第五方面的第二种可能的实现方式中, 在所述获取已经存储的
PRACH配置信息之前, 还包括:
接收来自所述基站的所述系统消息;
根据下行信息计算信号传输过程中的路径损耗, 并根据所述路 径损耗确定匹配的覆盖增强等级。
结合前述的第五方面以及第五方面的第一至第二种可能的实现 方式, 在第五方面的第三种可能的实现方式中, 在从所述起始 PRACH 资源处开始发送前导码 preamble至所述基站之后, 还包括:
在 PDCCH 信道上按照指定随机接入无线网络临时标识 RA-RNTI 计算公式获取基站发送的下行资源信息;
根据解扰后的下行资源信息所指定的信道接收来自所述基站的 随机接入响应 RAR, 并按照所述 RAR 携带的重复次数索引所对应的 重复次数发送 msg3。
结合前述的第五方面以及第五方面的第一至第三种可能的实现 方式, 在第五方面的第四种可能的实现方式中, 在所述在 PDCCH 信 道上按照指定随机接入无线网络临时标识 RA-RNTI 计算公式获取基 站发送的下行资源信息之后, 还包括:
若获取到的所述下行资源信息中携带拒绝接受信息, 则在预置 时间段内停止发送 preamble至所述基站, 所述拒绝接受信息包括拒 绝接受指令和 /或所述预置时间段。
结合前述的第五方面以及第五方面的第一至第四种可能的实现 方式, 在第五方面的第五种可能的实现方式中, 在所述从所述起始 PRACH资源处开始发送 preamble至所述基站之后, 还包括:
在 PDCCH信道上获取所述基站发送的指定下行控制信息 DCI格 式的下行资源信息;
根据所述指定 DCI 格式的下行资源信息接收来自所述基站的 RAR, 并按照所述 RAR 携带的复次数索引所对应的重复次数发送 ms g 3。
结合前述的第五方面以及第五方面的第一至第五种可能的实现 方式, 在第五方面的第六种可能的实现方式中, 所述接收来自所述 基站的所述系统消息中包含有多组 PRACH 配置信息, 每一组 PRACH 配置信息对应一个覆盖增强等级,
其中, 所述对所述至少一组 PRACH 配置信息进行解析, 获得对 应的起始 PRACH资源, 包括:
根据所述匹配的覆盖增强等级匹配对应的 PRACH配置信息; 居匹配的 PRACH配置信息获取对应的所述起始 PRACH资源。 结合前述的第五方面以及第五方面的第一至第六种可能的实现 方式, 在第五方面的第七种可能的实现方式中, 所述来自所述基站 的所述系统消息还包括至少一组接入类别阻止 E ACB 参数, 每一 组 EACB 参数对应一个覆盖增强等级,
其中,在从所述起始 PRACH资源处开始发送 reamble至所述基 站之前, 还包括:
根据所述对应的覆盖增强等级选择对应的 EACB 参数, 进而根 据所述 EACB 参数判断所述基站是否允许接入,所述 EACB 参数判断 的结果用于指示是否从所述起始 PRACH 资源处按照预设频率发送 preamble至所述基站。
结合前述的第五方面以及第五方面的第一至第七种可能的实现 方式, 在第五方面的第八种可能的实现方式中 , 在所述根据所 述 EACB 参数判断所述基站是否允许接入之后, 还包括:
若所述 EACB 参数判断的结果为允许接入, 则执行增强接入拒 绝 E AB判决和 /或 ACB判决, 所述 E AB判决和 /或 ACB判决的结果用 于指示是否从所述起始 PRACH资源处按照预设频率发送 preamble至 所述基站。
第六方面, 本发明的实施例提供一种随机接入的方法, 包括: 对物理随机接入信道 PRACH 资源进行预配置, 并生成至少一组 PRACH 配置信息发送至终端设备, 以使得所述终端设备则获取所述 至少一组 PRACH 配置信息; 以及所述终端设备根据所述至少一组 PRACH 配置信息匹配对应的起始 PRACH 资源, 所述 PRACH 配置信息 的内容包括预置周期时间和 /或预置起始位置;
接收来自所述终端设备的 preamble, 并对所述起始 PRACH资源 处对应的下行资源信息按照指定随机接入无线网络临时标识 RA-RNTI计算公式进行力口扰;
在 PDCCH信道上发送加扰后的下行资源信息至所述终端设备, 以使得所述终端设备在 PDCCH 信道上获取加扰后的下行资源信息并 按照所述指定 RA-RNTI计算公式对所述下行资源信息进行解扰。
在第六方面的第一种可能的实现方式中, 在所述在 PDCCH信道 上发送加扰后的下行资源信息至所述终端设备之后, 还包括:
发送随机接入响应 RAR至所述终端设备, 以使得所述终端设备 按照所述 RAR携带的重复次数索引所对应的重复次数发送 msg3。
结合前述的第六方面以及第六方面的第一种可能的实现方式, 在第六方面的第二种可能的实现方式中, 在所述接收来自所述终端 设备的 preamble之后, 还包括:
在所述 PDCCH信道上发送拒绝接受信息至所述终端设备, 以使 得所述终端设备在预置时间段内停止发送 preamble, 所述拒绝接受 信息包括拒绝接受指令和 /或所述预置时间段。
结合前述的第六方面以及第六方面的第一至第二种可能的实现 方式, 在第六方面的第三种可能的实现方式中, 在所述接收来自所 述终端设备的 preamble之后, 还包括:
在所述 PDCCH信道上发送指定下行控制信息 DCI格式的下行资 源信息至所述终端设备, 以使得所述终端设备接收所述指定 DCI 格 式的下行资源信息;
等待预置处理时间后,发送随机接入响应 RAR至所述终端设备, 以使得所述终端设备按照所述 RAR携带的重复次数索引所对应的重 复次数发送 msg3。
结合前述的第六方面以及第六方面的第一至第三种可能的实现 方式, 在第六方面的第四种可能的实现方式中, 所述对物理随机接 入信道 PRACH 资源进行预配置, 并生成至少一组 PRACH 配置信息发 送至终端设备, 还包括:
配置至少一组接入类别阻止 EACB参数并发送至所述终端设备, 其中, 每一组 EAC B 参数对应一个覆盖增强等级。
本发明的实施例提供一种随机接入的方法及装置, 基站为需要 覆盖增强的终端设备预先配置多组 PRAC H 配置信息并发送至终端设 备, 以使得终端设备对 P RAC H 配置信息进行解析, 获得对应的起始 PRAC H 资源进而发送 p r e amb l e 至所述基站, 以使得基站根据所述 p r e a m b 1 e建立与终端设备的连接, 使得基站识别需要覆盖增强的终 端设备的接入请求同时不影响其他终端设备的接入。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下 面将对实施例或现有技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是本发明的一些实施例, 对于 本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还可以 根据这些附图获得其他的附图。
图 1为本发明实施例提供的一种终端设备的结构示意图一; 图 2为本发明实施例提供的一种终端设备的结构示意图二; 图 3为本发明实施例提供的一种基站的结构示意图;
图 4为本发明实施例提供的一种手机终端的硬件结构示意图; 图 5为本发明实施例提供的一种基站的硬件结构示意图; 图 6 为本发明实施例提供的一种随机接入的方法的流程示意图 图 7 为本发明实施例提供的 种随机接入的方法的流程示意图 图 8 为本发明实施例提供的 种随机接入的方法的流程示意图 图 9 为本发明实施例提供的 种针对指定业务提高随机接入效 率的方法的流程示意图。
具体实施方式 下面将结合本发明实施例中的附图, 对本发明实施例中的技术 方案进行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明 一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本 领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他 实施例, 都属于本发明保护的范围。
终端设备, 可以是无线终端也可以是有线终端, 无线终端可以 是指向用户提供语音和 /或数据连通性的设备, 具有无线连接功能的 手持式设备、 或连接到无线调制解调器的其他处理设备。 无线终端 可以经无线接入网 (例如, RAN, Radio Access Network ) 与一个或 多个核心网进行通信, 无线终端可以是移动终端, 如移动电话 (或 称为 "蜂窝" 电话) 和具有移动终端的计算机。
基站 (例如, 接入点) 可以是指接入网中在空中接口上通过一 个或多个扇区与无线终端通信的设备。 基站可用于将收到的空中帧 与 IP分组进行相互转换, 作为无线终端与接入网的其余部分之间的 路由器, 其中接入网的其余部分可包括网际协议 ( IP ) 网络。 基站 还可协调对空中接口的属性管理。 例如, 基站可以是 GSM或 CDMA中 的基站 ( BTS, Base Transceiver Station ), 也可以是 WCDMA 中的 基站 ( NodeB ), 还可以是 LTE 中的演进型基站 ( NodeB 或 eNB 或 e-NodeB, evolutional Node B ), 本发明并不限定。
本发明实施例应用在一种无线通信系统中,该无线通信系统至 少包括终端设备和基站。
本发明的实施例提供一种随机接入的方法及装置, 基站为需要 覆盖增强的终端设备预先配置多组 PRACH 配置信息并发送至终端设 备, 以使得终端设备对 PRACH 配置信息进行解析, 获得对应的起始 PRACH 资源进而发送 preamble 至所述基站, 以使得基站根据所述 p r e a m b 1 e建立与终端设备的连接, 使得基站识别需要覆盖增强的终 端设备的接入请求同时不影响其他终端设备的接入。
实施例一
本发明的实施例提供一种终端设备, 如图 1所示, 包括: 第一获取单元 01, 用于获取已经存储的至少一组物理随机接入 信道 PRACH 配置信息, 所述至少一组 PRACH 配置信息为基站发送的 系统信息中携带的;
处理单元 02, 用于对所述至少一组 PRACH配置信息进行解析, 获得对应的起始 PRACH资源;
第一发送单元 03, 用于从所述起始 PRACH资源处开始发送前导 码 preamble至所述基站, 以使得基站根据所述 reamble建立与终 端设备的连接。
进一步地, 所述系统消息中至少包括所述至少一组 PRACH配置 信息, 其中, 所述 PRACH配置信息的内容包括预置周期时间和 /或预 置起始位置。
进一步地, 所述第一获取单元 01, 还用于接收来自所述基站的 所述系统消息;
所述处理单元 02, 还用于根据下行信息计算信号传输过程中的 路径损耗, 并根据所述路径损耗确定匹配的覆盖增强等级。
进一步地, 所述第一获取单元 01, 还用于在 PDCCH信道上按照 指定随机接入无线网络临时标识 RA-RNTI 计算公式获取基站发送的 下行资源信息; 以及根据解扰后的下行资源信息所指定的信道接收 来自所述基站的随机接入响应 RAR, 并按照所述 RAR 携带的重复次 数索引所对应的重复次数发送 msg3。
进一步地, 如图 2所示, 所述终端设备还包括:
判断单元 04, 用于若获取到的所述下行资源信息中携带拒绝接 受信息, 则在预置时间段内停止发送 preamble至所述基站, 所述拒 绝接受信息包括拒绝接受指令和 /或所述预置时间段。
进一步地, 所述第一获取单元 01, 还用于在 PDCCH信道上获取 所述基站发送的指定下行控制信息 DCI格式的下行资源信息;
所述第一发送单元 03, 还用于根据所述指定 DCI格式的下行资 源信息接收来自所述基站的 RAR, 并按照所述 RAR 携带的复次数索 引所对应的重复次数发送 msg3。 进一步地, 所述接收来自所述基站的所述系统消息中包含有多 组 PRACH配置信息, 每一组 PRACH配置信息对应一个覆盖增强等级, 其中,
所述处理单元 02, 具体用于根据所述匹配的覆盖增强等级匹配 对应的 PRACH 配置信息; 以及根据匹配的 PRACH 配置信息获取对应 的所述起始 PRACH资源。
进一步地, 所述来自所述基站的所述系统消息还包括至少一组 接入类别阻止 EACB参数,每一组 EACB参数对应一个覆盖增强等级, 其中,
所述处理单元 02, 还用于根据所述对应的覆盖增强等级选择对 应的 EACB 参数, 进而根据所述 EACB 参数判断所述基站是否允许接 入,所述 EACB 参数判断的结果用于指示是否从所述起始 PRACH资源 处按照预设频率发送 preamble至所述基站。
进一步地, 所述判断单元 04, 还用于若所述 EACB 参数判断的 结果为允许接入, 则执行增强接入拒绝 EAB判决和 /或 ACB判决, 所 述 EAB判决和 /或 ACB判决的结果用于指示是否从所述起始 PRACH资 源处按照预设频率发送 preamble至所述基站。
本发明的实施例提供一种终端设备, 通过获取已经存储的至少 一组物理随机接入信道 PRACH 配置信息, 所述至少一组 PRACH 配置 信息为基站发送的系统信息中携带的; 对所述至少一组 PRACH 配置 信息进行解析, 获得对应的起始 PRACH 资源; 从所述起始 PRACH 资 源处开始发送前导码 preamble 至所述基站, 以使得基站根据所述 preamble建立与终端设备的连接。 该方案中, 基站为需要覆盖增强 的终端设备预先配置多组 PRACH 配置信息并发送至终端设备, 以使 得终端设备对 PRACH 配置信息进行解析, 获得对应的起始 PRACH 资 源进而发送 reamble 至所述基站, 以使得基站才艮据所述 reamble 建立与终端设备的连接, 使得基站识别需要覆盖增强的终端设备的 接入请求同时不影响其他终端设备的接入。 实施例二
本发明的实施例提供一种基站, 如图 3所示, 包括:
配置单元 11,用于对物理随机接入信道 PRACH资源进行预配置, 并生成至少一组 PRACH 配置信息发送至终端设备, 以使得所述终端 设备则获取所述至少一组 PRACH 配置信息; 以及所述终端设备根据 所述至少一组 PRACH 配置信息匹配对应的起始 PRACH 资源, 所述 PRACH配置信息的内容包括预置周期时间和 /或预置起始位置;
第二获取单元 12, 用于接收来自所述终端设备的 preamble, 并 对所述起始 PRACH 资源处对应的下行资源信息按照指定随机接入无 线网络临时标识 R A-RNT I计算公式进行加扰;
第二发送单元 13, 用于在 PDCCH信道上发送加扰后的下行资源 信息至所述终端设备, 以使得所述终端设备在 PDCCH 信道上获取加 扰后的下行资源信息并按照所述指定 RA-RNTI 计算公式对所述下行 资源信息进行解扰。
进一步地,所述第二发送单元 13,还用于发送随机接入响应 RAR 至所述终端设备, 以使得所述终端设备按照所述 RAR携带的重复次 数索引所对应的重复次数发送 msg3。
进一步地, 所述第二发送单元 13, 还用于在所述 PDCCH信道上 发送拒绝接受信息至所述终端设备, 以使得所述终端设备在预置时 间段内停止发送 preamble, 所述拒绝接受信息包括拒绝接受指令和 /或所述预置时间段。
进一步地, 所述第二发送单元 13, 还用于在所述 PDCCH信道上 发送指定下行控制信息 DCI 格式的下行资源信息至所述终端设备, 以使得所述终端设备接收所述指定 DCI 格式的下行资源信息; 以及 等待预置处理时间后, 发送随机接入响应 RAR 至所述终端设备, 以 使得所述终端设备按照所述 RAR携带的重复次数索引所对应的重复 次数发送 msg3。
进一步地, 所述配置单元 11, 还用于配置至少一组接入类别阻 止 EACB参数并发送至所述终端设备, 其中, 每一组 EACB参数对应 一个覆盖增强等级。
本发明的实施例提供一种基站, 通过获取已经存储的至少一组 物理随机接入信道 PRACH 配置信息, 所述至少一组 PRACH 配置信息 为基站发送的系统信息中携带的; 对所述至少一组 PRACH 配置信息 进行解析, 获得对应的起始 PRACH 资源; 从所述起始 PRACH 资源处 开始发送前导码 preamble 至所述基站, 以使得基站根据所述 preamble建立与终端设备的连接。 该方案中, 基站为需要覆盖增强 的终端设备预先配置多组 PRACH 配置信息并发送至终端设备, 以使 得终端设备对 PRACH 配置信息进行解析, 获得对应的起始 PRACH 资 源进而发送 reamble 至所述基站, 以使得基站才艮据所述 reamble 建立与终端设备的连接, 使得基站识别需要覆盖增强的终端设备的 接入请求同时不影响其他终端设备的接入。 实施例三
附图 4示出的是本发明的终端设备的硬件示意图:
该终端设备可以为手机、 PC、 电表、 水表等机器等, 本实施例 以手机终端举例说明:
如图 4 所示该手机终端包括接收器 101、 处理器 102、 发送器
103。
其中, 手机终端的处理器 101 是手机终端的控制中心, 通过运 行或执行内存的软件程序和 /或模块, 执行手机终端的各种功能和处 理数据。
收发模块 101、 103可用于收发信息或通话过程中, 信号的接收 和发送, 特别地, 对于手机终端, 将基站的下行信息接收后, 给处 理器 102处理; 另外,将设计上行的数据发送给基站。收发模块 101、 103 可以通过无线通信与网络和其他设备通信。 所述无线通信可以 使用任一通信标准或协议, 包括但不限于 GSM (Global System of Mobile communication, 全球移动通讯系统)、 GPRS (General Packet Radio Service, 通用分组无线月良务)、 CDMA (Code Division Multiple Access , 码分多 址) 、 WCDMA (Wideband Code Division Multiple Access, 宽带码分多址)、 LTE (Long Term Evo 1 u t i on,长期演进)、 电子由 P件、 SMS (Short Messaging Service, 短消息月良务)等。
在本发明实施例中, 所示接收器 101, 用于获取已经存储的至 少一组物理随机接入信道 PRACH 配置信息, 所述至少一组 PRACH配 置信息为基站发送的系统信息中携带的; 所示处理器 102, 用于对 所述至少一组 PRACH 配置信息进行解析, 获得对应的起始 PRACH 资 源; 所示发送器 103, 用于从所述起始 PRACH 资源处开始发送前导 码 preamble至所述基站, 以使得基站根据所述 reamble建立与终 端设备的连接。
进一步地, 所述系统消息中至少包括所述至少一组 PRACH配置 信息, 其中, 所述 PRACH配置信息的内容包括预置周期时间和 /或预 置起始位置。
进一步地, 所述接收器 101, 还用于接收来自所述基站的所述 系统消息;
所述处理器 102, 还用于根据下行信息计算信号传输过程中的 路径损耗, 并根据所述路径损耗确定匹配的覆盖增强等级。
进一步地, 所述发送器 103, 还用于在 PDCCH 信道上按照指定 随机接入无线网络临时标识 RA-RNTI 计算公式获取基站发送的下行 资源信息;
所述接收器 101, 还用于根据解扰后的下行资源信息所指定的 信道接收来自所述基站的随机接入响应 RAR, 并按照所述 RAR 携带 的重复次数索引所对应的重复次数发送 msg3。
进一步地, 所述处理器 102, 还用于若获取到的所述下行资源 信息中携带拒绝接受信息, 则在预置时间段内停止发送 preamble至 所述基站, 所述拒绝接受信息包括拒绝接受指令和 /或所述预置时间 段。
进一步地, 所述接收器 101, 还用于在 PDCCH 信道上获取所述 基站发送的指定下行控制信息 DCI 格式的下行资源信息; 以及根据 所述指定 DCI 格式的下行资源信息接收来自所述基站的 RAR, 并按 照所述 RAR携带的复次数索引所对应的重复次数发送 msg3。
进一步地, 所述接收来自所述基站的所述系统消息中包含有多 组 PRACH配置信息, 每一组 PRACH配置信息对应一个覆盖增强等级, 其中,
所述处理器 102, 具体用于根据所述匹配的覆盖增强等级匹配 对应的 PRACH 配置信息; 以及根据匹配的 PRACH 配置信息获取对应 的所述起始 PRACH资源。
进一步地, 所述来自所述基站的所述系统消息还包括至少一组 接入类别阻止 EACB参数,每一组 EACB参数对应一个覆盖增强等级, 其中,
所述处理器 102, 还用于根据所述对应的覆盖增强等级选择对 应的 EACB 参数, 进而根据所述 EACB 参数判断所述基站是否允许接 入,所述 EACB 参数判断的结果用于指示是否从所述起始 PRACH资源 处按照预设频率发送 preamble至所述基站。
进一步地, 所述处理器 102, 还用于若所述 EACB参数判断的结 果为允许接入, 则执行增强接入拒绝 EAB判决和 /或 ACB判决, 所述 EAB判决和 /或 ACB判决的结果用于指示是否从所述起始 PRACH资源 处按照预设频率发送 preamble至所述基站。
本发明的实施例提供一种终端设备, 通过获取已经存储的至少 一组物理随机接入信道 PRACH 配置信息, 所述至少一组 PRACH 配置 信息为基站发送的系统信息中携带的; 对所述至少一组 PRACH 配置 信息进行解析, 获得对应的起始 PRACH 资源; 从所述起始 PRACH 资 源处开始发送前导码 preamble 至所述基站, 以使得基站根据所述 preamble建立与终端设备的连接。 该方案中, 基站为需要覆盖增强 的终端设备预先配置多组 PRACH 配置信息并发送至终端设备, 以使 得终端设备对 PRACH 配置信息进行解析, 获得对应的起始 PRACH 资 源进而发送 reamble 至所述基站, 以使得基站才艮据所述 reamble 建立与终端设备的连接, 使得基站识别需要覆盖增强的终端设备的 接入请求同时不影响其他终端设备的接入。 实施例四
附图 5示出的是本发明的基站的硬件示意图:
如图 5所示该基站包括处理器 201、 接收器 202、 发送器 203。 其中: 所述处理器 201, 用于对物理随机接入信道 PRACH 资源 进行预配置, 并生成至少一组 PRACH 配置信息发送至终端设备, 以 使得所述终端设备则获取所述至少一组 PRACH 配置信息; 以及所述 终端设备根据所述至少一组 PRACH 配置信息匹配对应的起始 PRACH 资源, 所述 PRACH配置信息的内容包括预置周期时间和 /或预置起始 位置; 所述接收器 202, 用于接收来自所述终端设备的 preamble, 并对所述起始 PRACH 资源处对应的下行资源信息按照指定随机接入 无线网络临时标识 RA-RNTI 计算公式进行加扰; 所述发送器 203, 用于在 PDCCH 信道上发送加扰后的下行资源信息至所述终端设备, 以使得所述终端设备在 PDCCH 信道上获取加扰后的下行资源信息并 按照所述指定 RA-RNTI计算公式对所述下行资源信息进行解扰。
进一步地, 所述发送器 203, 还用于发送随机接入响应 RAR 至 所述终端设备, 以使得所述终端设备按照所述 RAR 携带的重复次数 索引所对应的重复次数发送 msg3。
进一步地, 所述接收器 202, 还用于在所述 PDCCH 信道上发送 拒绝接受信息至所述终端设备, 以使得所述终端设备在预置时间段 内停止发送 preamble, 所述拒绝接受信息包括拒绝接受指令和 /或 所述预置时间段。
进一步地, 所述发送器 203, 还用于在所述 PDCCH 信道上发送 指定下行控制信息 DCI 格式的下行资源信息至所述终端设备, 以使 得所述终端设备接收所述指定 DCI 格式的下行资源信息; 以及等待 预置处理时间后, 发送随机接入响应 RAR 至所述终端设备, 以使得 所述终端设备按照所述 RAR携带的重复次数索引所对应的重复次数 发送 msg3。 进一步地, 所述处理器 201, 还用于配置至少一组接入类别阻 止 EACB参数并发送至所述终端设备, 其中, 每一组 EACB参数对应 一个覆盖增强等级。
本发明的实施例提供一种终端设备, 通过获取已经存储的至少 一组物理随机接入信道 PRACH 配置信息, 所述至少一组 PRACH 配置 信息为基站发送的系统信息中携带的; 对所述至少一组 PRACH 配置 信息进行解析, 获得对应的起始 PRACH 资源; 从所述起始 PRACH 资 源处开始发送前导码 preamble 至所述基站, 以使得基站根据所述 preamble建立与终端设备的连接。 该方案中, 基站为需要覆盖增强 的终端设备预先配置多组 PRACH 配置信息并发送至终端设备, 以使 得终端设备对 PRACH 配置信息进行解析, 获得对应的起始 PRACH 资 源进而发送 reamble 至所述基站, 以使得基站才艮据所述 reamble 建立与终端设备的连接, 使得基站识别需要覆盖增强的终端设备的 接入请求同时不影响其他终端设备的接入。 实施例五
本发明的实施例提供一种随机接入的方法, 如图 6所示, 包括: 301、 终端设备获取已经存储的至少一组物理随机接入信道
PRACH 酉己 U言, 。
其中, 所述至少一组 PRACH配置信息为基站发送的系统信息中 携带的, 所述 PRACH配置信息的内容包括预置周期时间和 /或预置起 始位置。
现有技术中, 当终端设备需要执行随机接入时, 首选选择一个 随机接入码 , 然后选择一个 PRACH ( physical random access channel , 物理随机接入信道), PRACH 的选择基于系统信息中的 PRACH配置。 然后 UE在所选择的 PRACH上发送选择的随机接入码, 并在 3 个子帧后开始尝试获取基站下发的随机接入响应, 随机接入 响应是通过 PDCCH 力口掩 RA-RNTI 来调度的。 其中, RA-RNTI 的计算 方式为: RA-RNTI= l + t-id+10*f_id, t.id 为选择的 PRACH 对应的 第一个子帧, 取值范围为 [0, 10) , f_id为选择 PRACH所在的子帧对 应的 PRACH的索引, 在频域该索引以升序排列, 取值范围为 [0, 6)。
在本发明的实施例中, 基站为需要覆盖增强的终端设备专门配 置 PRACH 配置信息, 以使得终端设备根据相应的 PRACH起始资源向 基站发送 preamble。
优选的, 所述 PRACH配置信息的内容可以为如下一种或多种: a.预置周期;
b.预置周期及起始位置, 所述起始位置为起始频率;
c.预置周期及起始位置, 所述起始位置为起始时间, 所述起始 时间由帧偏移表示;
d. 预置周期及起始位置, 所述起始位置为起始时间, 所述起始 时间由帧偏移及子帧号表示;
e.预置周期及起始位置,所述起始位置为起始频率和起始时间, 所述起始时间由帧偏移表示;
f.预置周期及起始位置,所述起始位置为起始频率和起始时间, 所述起始时间由帧偏移及子帧号表示。
进一步地, 在终端设备获取所述 PRACH配置信息之前, 还可以 接收来自所述基站的所述系统消息; 进而根据下行信息计算信号传 输过程中的路径损耗, 并根据所述路径损耗确定匹配的覆盖增强等 级。 其中, 所述系统消息中可以携带多套 PRACH 配置信息, 每一套 PRACH 配置信息对应一个覆盖增强等级。 在终端设备基于对路损的 估计后, 确定匹配的覆盖增强等级, 然后应用该等级对应的 PRACH 配置信息。
302、 终端设备对至少一组 PRACH配置信息进行解析, 获得对应 的起始 PRACH资源。
具体的, 在终端设备获取已经存储的至少一组物理随机接入信 道 PRACH 配置信息之后, 终端设备对至少一组 PRACH 配置信息进行 解析, 进而获得对应的起始 PRACH 资源。 其中, 终端设备可以获取 多组 PRACH配置信息, 进而获得对应的多组起始 PRACH资源。 优选的, 与步骤 301相对应,
当 PRACH 配置信息为预置周期时, 终端设备选择的起始 PRACH 资源仅能为系统帧号模周期为 0的帧中的第一个 PRACH资源, 或者, 终端设备选择的起始 PRACH 资源仅能为系统帧号模周期为 0 的偶数 帧中的第一个 PRACH资源;
当 PRACH配置信息为预置周期及起始位置, 所述起始位置为起 始频率时, 终端设备选择的起始 PRACH资源仅能为系统帧号模周期 为 0 的帧中的起始频率对应的 PRAC H 资源, 或者, 终端设备选择的 起始 PRAC H 资源仅能为系统帧号模周期为 0 的偶数帧中的起始频率 对应的 PRACH资源;
当 PRACH配置信息为预置周期及起始位置, 所述起始位置为起 始时间,所述起始时间由帧偏移表示时, 终端设备选择的起始 PRACH 资源仅能为系统帧号模周期为帧偏移中的第一个 PRACH资源, 或者, 终端设备选择的起始 PRACH 资源仅能为系统帧号模周期为帧偏移的 偶数帧中的第一个 PRACH资源;
当 PRACH配置信息为预置周期及起始位置, 所述起始位置为起 始时间, 所述起始时间由帧偏移及子帧号表示时, 终端设备选择的 起始 PRAC H 资源仅能为系统帧号模周期为帧偏移的帧中的子帧号对 应的子帧中的 PRACH 资源, 或者, 终端设备选择的起始 PRACH 资源 仅能为系统帧号模周期为帧偏移的偶数帧中的子帧号对应的子帧中 的 PRACH资源;
当 PRACH配置信息为预置周期及起始位置, 所述起始位置为起 始频率和起始时间, 所述起始时间由帧偏移表示时, 终端设备选择 的起始 PRACH 资源仅能为系统帧号模周期为帧偏移中的起始频率对 应的 PRAC H 资源, 或者, 终端设备选择的起始 PRACH 资源仅能为系 统帧号模周期为帧偏移的偶数帧中的起始频率对应的 PRACH资源; 当 PRACH配置信息为预置周期及起始位置, 所述起始位置为起 始频率和起始时间, 所述起始时间由帧偏移及子帧号表示时, 终端 设备选择的起始 PRACH 资源仅能为系统帧号模周期为帧偏移的帧中 的子帧号对应的子帧中的起始频率对应的 PRACH 资源, 或者, 终端 设备选择的起始 PRACH 资源仅能为系统帧号模周期为帧偏移的偶数 帧中的子帧号对应的子帧中的起始频率 (频率偏移) 对应的 PRACH 资源。
至此, 终端设备对至少一组 PRACH 配置信息进行解析, 获得对 应的起始 PRACH资源。
303、 终端设备从起始 PRACH 资源处开始发送前导码 preamble 至基站, 以使得基站根据 preamble建立与终端设备的连接。
具体的, 在终端设备获得对应的起始 PRACH 资源后, 终端设备 从起始 PRACH资源处按照计算出的 preamble的发送功率, 开始重复 发送前导码 reamble至基站。
具体的, 终端设备对 preamble的发送功率的选择, 可以选择釆 用预置的最大发射功率发送, 或者,
终端设备基于对路径损耗计算以及对应的覆盖增强等级的选 择, 计算 preamble的发射功率。
进一步地, 在终端设备从起始 PRACH 资源处开始发送前导码 preamble至基站之后, 终端设备还可以在 PDCCH信道上按照指定随 机接入无线网络临时标识 RA-RNTI 计算公式获取基站发送的下行资 源信息; 并根据解扰后的下行资源信息所指定的信道接收来自所述 基站的随机接入响应 RAR, 并按照所述 RAR 携带的重复次数索引所 对应的重复次数发送 ms g 3。
其中, 所述指定 RA-RNTI计算公式可以为:
RA-RNTI= l+t-id+10*f_id+X
其中, X为偏移量, t_id及 f_id为重复发送 preamble时使用 的第一个 PRACH资源, 或最后一个 PRACH资源。
需要说明的是, 若所述系统消息中可以携带多套 PRACH配置信 息, 且每一套 PRACH 配置信息对应一个覆盖增强等级, 终端设备在 计算 RA-RNTI 时, 对于多个不同覆盖增强等级, 对应不同的偏移量 X。 例如, 对于增强等级一, 偏移量 X 可以 10 , 即 RA-RNTI = l + t-id+10*f_id+10, 对于增强等级二, 偏移量 X为 20, 即 RA_RNTI = l + t_ id+10*f _ id + 20。
另夕卜, 所述 RA-RNTI 也可以不通过计算的方式, 而是通过系统 信息中配置的方式, 即在所述系统信息中携带对应终端设备的 RA-RNTI 来指示覆盖增强等级对应的 RA-RNTI。
本发明的实施例提供一种随机接入的方法, 如图 7所示, 包括:
401、 基站对物理随机接入信道 PRACH资源进行预配置, 并生成 至少一组 PRACH 配置信息发送至终端设备, 以使得终端设备则获取 至少一组 PRACH 配置信息; 进而终端设备根据至少一组 PRACH 配置 信息匹配对应的起始 PRACH 资源, PRACH 配置信息的内容包括预置 周期时间和 /或预置起始位置。
本发明的实施例提供一种随机接入的方法及装置, 基站为需要 覆盖增强的终端设备预先配置多组 PRACH 配置信息并发送至终端设 备, 以使得终端设备对 PRACH 配置信息进行解析, 获得对应的起始 PRACH 资源进而发送 preamble 至所述基站, 以使得基站根据所述 p r e a m b 1 e建立与终端设备的连接, 使得基站识别需要覆盖增强的终 端设备的接入请求同时不影响其他终端设备的接入。
优选的, 所述 PRACH配置信息的内容可以为如下一种或多种: a.预置周期;
b.预置周期及起始位置, 所述起始位置为起始频率;
c.预置周期及起始位置, 所述起始位置为起始时间, 所述起始 时间由帧偏移表示;
d. 预置周期及起始位置, 所述起始位置为起始时间, 所述起始 时间由帧偏移及子帧号表示;
e.预置周期及起始位置,所述起始位置为起始频率和起始时间, 所述起始时间由帧偏移表示;
f.预置周期及起始位置,所述起始位置为起始频率和起始时间, 所述起始时间由帧偏移及子帧号表示。
进一步地, 在终端设备获取所述 PRACH配置信息之前, 还可以 接收来自所述基站的所述系统消息; 进而根据下行信息计算信号传 输过程中的路径损耗, 并根据所述路径损耗确定匹配的覆盖增强等 级。 其中, 所述系统消息中可以携带多套 PRACH 配置信息, 每一套 PRACH 配置信息对应一个覆盖增强等级。 在终端设备基于对路损的 估计后, 确定匹配的覆盖增强等级, 然后应用该等级对应的 PRACH 配置信息。
402、 基站接收来自终端设备的 preamble, 并对起始 PRACH 资 源处对应的下行资源信息按照指定随机接入无线网络临时标识 RA-RNTI计算公式进行力口扰。
其中, 所述指定 RA-RNTI计算公式可以为:
RA-RNTI= l+t-id+10*f_id+X
其中, X为偏移量, t_id及 f_id为重复发送 preamble时使用 的第一个 PRACH资源, 或最后一个 PRACH资源。
需要说明的是, 若所述系统消息中可以携带多套 PRACH配置信 息, 且每一套 PRACH 配置信息对应一个覆盖增强等级, 终端设备在 计算 RA-RNTI 时, 对于多个不同覆盖增强等级, 对应不同的偏移量 X。 例如, 对于增强等级一, 偏移量 X 可以 10 , 即 RA-RNTI = l + t-id+10*f_id+10, 对于增强等级二, 偏移量 X为 20, 即 RA_RNTI = l + t_ id+10*f _ id + 20。
另夕卜, 所述 RA-RNTI 也可以不通过计算的方式, 而是通过系统 信息中配置的方式, 即在所述系统信息中携带对应终端设备的 RA-RNTI 来指示覆盖增强等级对应的 RA-RNTI。
403、基站在 PDCCH信道上发送加扰后的下行资源信息至终端设 备, 以使得终端设备在 PDCCH 信道上获取加扰后的下行资源信息并 按照指定 RA-RNTI计算公式对下行资源信息进行解扰。
具体的,基站在收到 reamble后,发送 RA-RNTI力口扰的 PDCCH, 并在 PDCCH 发送结束之后, 经过一个处理时间, 发送 RAR ( Random Access Response, 随机接入响应 ), 所述 RAR 中可以携带 ms g 3的重 复次数索引。 当终端收到 RAR 后, 经过一个处理时间, 开始按照所 述重复次数索引对应的重复次数, 占用 RAR 中指示的上行授权资源 来发送 msg30
本发明的实施例提供一种随机接入的方法, 通过获取已经存储 的至少一组物理随机接入信道 PRACH配置信息,所述至少一组 PRACH 配置信息为基站发送的系统信息中携带的; 对所述至少一组 PRACH 配置信息进行解析, 获得对应的起始 PRACH资源; 从所述起始 PRACH 资源处开始发送前导码 preamble至所述基站, 以使得基站根据所述 preamble建立与终端设备的连接。 该方案中, 基站为需要覆盖增强 的终端设备预先配置多组 PRACH 配置信息并发送至终端设备, 以使 得终端设备对 PRACH 配置信息进行解析, 获得对应的起始 PRACH 资 源进而发送 reamble 至所述基站, 以使得基站才艮据所述 reamble 建立与终端设备的连接, 使得基站识别需要覆盖增强的终端设备的 接入请求同时不影响其他终端设备的接入。 实施例六
本发明的实施例提供一种随机接入的方法, 如图 8所示, 包括:
501、 终端设备对物理随机接入信道 PRACH资源进行预配置, 并 生成系统消息发送至终端设备。
本发明的实施例提供一种随机接入的方法及装置, 基站为需要 覆盖增强的终端设备预先配置多组 PRACH 配置信息并发送至终端设 备, 以使得终端设备对 PRACH 配置信息进行解析, 获得对应的起始 PRACH 资源进而发送 preamble 至所述基站, 以使得基站根据所述 p r e a m b 1 e建立与终端设备的连接, 使得基站识别需要覆盖增强的终 端设备的接入请求同时不影响其他终端设备的接入。
其中, 所述至少一组 PRACH配置信息为基站发送的系统信息中 携带的, 所述 PRACH配置信息的内容包括预置周期时间和 /或预置起 始位置。
优选的, 所述 PRACH配置信息的内容可以为如下一种或多种: a.预置周期; b.预置周期及起始位置, 所述起始位置为起始频率; c .预置周期及起始位置, 所述起始位置为起始时间, 所述起始 时间由帧偏移表示;
d. 预置周期及起始位置, 所述起始位置为起始时间, 所述起始 时间由帧偏移及子帧号表示;
e.预置周期及起始位置,所述起始位置为起始频率和起始时间, 所述起始时间由帧偏移表示;
f .预置周期及起始位置,所述起始位置为起始频率和起始时间, 所述起始时间由帧偏移及子帧号表示。
进一步地, 在终端设备获取所述 PRACH配置信息之前, 还可以 接收来自所述基站的所述系统消息; 进而根据下行信息计算信号传 输过程中的路径损耗, 并根据所述路径损耗确定匹配的覆盖增强等 级。 其中, 所述系统消息中可以携带多套 PRACH 配置信息, 每一套 PRACH 配置信息对应一个覆盖增强等级。 在终端设备基于对路损的 估计后, 确定匹配的覆盖增强等级, 然后应用该等级对应的 PRACH 配置信息。
5 02、 终端设备根据下行信息计算信号传输过程中的路径损耗, 并根据路径损耗确定匹配的覆盖增强等级。
具体的, 终端设备接收来自所述基站的所述系统消息; 进而根 据下行信息计算信号传输过程中的路径损耗, 并根据所述路径损耗 确定匹配的覆盖增强等级。 其中, 所述系统消息中可以携带多套 PRAC H 配置信息, 每一套 PRAC H 配置信息对应一个覆盖增强等级。 在终端设备基于对路损的估计后, 确定匹配的覆盖增强等级, 然后 应用该等级对应的 PRACH配置信息。
另外, 终端设备可以基于对路径损耗计算以及对应的覆盖增强 等级的选择, 计算 p r eamb l e的发射功率。
5 0 3、 终端设备获取已经存储的至少一组物理随机接入信道 PRACH 酉己 U言, 。
5 04、 终端设备对至少一组 PRAC H配置信息进行解析, 获得对应 的起始 PRACH资源。
具体的, 在终端设备获取已经存储的至少一组物理随机接入信 道 PRACH 配置信息之后, 终端设备对至少一组 PRACH 配置信息进行 解析, 进而获得对应的起始 PRACH 资源。 其中, 终端设备可以获取 多组 PRACH配置信息, 进而获得对应的多组起始 PRAC H资源。
优选的, 与步骤 301相对应,
当 PRACH 配置信息为预置周期时, 终端设备选择的起始 PRACH 资源仅能为系统帧号模周期为 0的帧中的第一个 PRACH资源, 或者, 终端设备选择的起始 PRACH 资源仅能为系统帧号模周期为 0 的偶数 帧中的第一个 PRACH资源;
当 PRACH配置信息为预置周期及起始位置, 所述起始位置为起 始频率时, 终端设备选择的起始 PRACH资源仅能为系统帧号模周期 为 0 的帧中的起始频率对应的 PRAC H 资源, 或者, 终端设备选择的 起始 PRAC H 资源仅能为系统帧号模周期为 0 的偶数帧中的起始频率 对应的 PRACH资源;
当 PRACH配置信息为预置周期及起始位置, 所述起始位置为起 始时间,所述起始时间由帧偏移表示时, 终端设备选择的起始 PRACH 资源仅能为系统帧号模周期为帧偏移中的第一个 PRACH资源, 或者, 终端设备选择的起始 PRACH 资源仅能为系统帧号模周期为帧偏移的 偶数帧中的第一个 PRACH资源;
当 PRACH配置信息为预置周期及起始位置, 所述起始位置为起 始时间, 所述起始时间由帧偏移及子帧号表示时, 终端设备选择的 起始 PRAC H 资源仅能为系统帧号模周期为帧偏移的帧中的子帧号对 应的子帧中的 PRACH 资源, 或者, 终端设备选择的起始 PRACH 资源 仅能为系统帧号模周期为帧偏移的偶数帧中的子帧号对应的子帧中 的 PRACH资源;
当 PRACH配置信息为预置周期及起始位置, 所述起始位置为起 始频率和起始时间, 所述起始时间由帧偏移表示时, 终端设备选择 的起始 PRACH 资源仅能为系统帧号模周期为帧偏移中的起始频率对 应的 PRACH 资源, 或者, 终端设备选择的起始 PRACH 资源仅能为系 统帧号模周期为帧偏移的偶数帧中的起始频率对应的 PRACH资源; 当 PRACH配置信息为预置周期及起始位置, 所述起始位置为起 始频率和起始时间, 所述起始时间由帧偏移及子帧号表示时, 终端 设备选择的起始 PRACH 资源仅能为系统帧号模周期为帧偏移的帧中 的子帧号对应的子帧中的起始频率对应的 PRACH 资源, 或者, 终端 设备选择的起始 PRACH 资源仅能为系统帧号模周期为帧偏移的偶数 帧中的子帧号对应的子帧中的起始频率 (频率偏移) 对应的 PRACH 资源。
505、 终端设备从起始 PRACH 资源处开始发送前导码 preamble 至基站, 以使得基站根据 preamble建立与终端设备的连接。
具体的, 在终端设备获得对应的起始 PRACH 资源后, 终端设备 从起始 PRACH资源处按照计算出的 preamble的发送功率, 开始重复 发送前导码 reamble至基站。
进一步地, 来自所述基站的所述系统消息还包括至少一组接入 类别阻止 E ACB 参数, 每一组 EACB 参数对应一个覆盖增强等级。 在终端设备从起始 PRACH资源处开始发送前导码 preamble至基站之 前, 终端设备根据所述对应的覆盖增强等级选择对应的 EACB 参数, 进而根据所述 EACB 参数判断所述基站是否允许接入, 若判断允许 接入, 终端设备则发送前导码 reamble至基站。
又或者, 若所述 EACB 参数判断的结果为允许接入, 终端设备 还可以执行增强接入拒绝 EAB判决和 /或 ACB判决, 所述 EAB判决和 /或 ACB判决的结果用于指示是否从所述起始 PRACH资源处按照预设 频率发送 reamble至所述基站。
506、 基站接收来自终端设备的 preamble, 并对起始 PRACH 资 源处对应的下行资源信息按照指定随机接入无线网络临时标识 RA-RNTI计算公式进行力口扰。
在终端设备从起始 PRACH资源处开始发送前导码 preamble至基 站之后, 终端设备还可以在 PDCCH 信道上按照指定随机接入无线网 络临时标识 RA-RNTI 计算公式获取基站发送的下行资源信息; 并根 据解扰后的下行资源信息所指定的信道接收来自所述基站的随机接 入响应 RAR, 并按照所述 RAR 携带的重复次数索引所对应的重复次 数发送 msg30
其中, 所述指定 RA-RNTI计算公式可以为:
RA-RNTI= l+t-id+10*f_id+X
其中, X为偏移量, t_id及 f_id为重复发送 preamble时使用 的第一个 PRACH资源, 或最后一个 PRACH资源。
需要说明的是, 若所述系统消息中可以携带多套 PRACH配置信 息, 且每一套 PRACH 配置信息对应一个覆盖增强等级, 终端设备在 计算 RA-RNTI 时, 对于多个不同覆盖增强等级, 对应不同的偏移量 X。 例如, 对于增强等级一, 偏移量 X 可以 10 , 即 RA-RNTI = l + t-id+10*f_id+10, 对于增强等级二, 偏移量 X为 20, 即 RA_RNTI = l + t_ id+10*f _ id + 20。
另夕卜, 所述 RA-RNTI 也可以不通过计算的方式, 而是通过系统 信息中配置的方式, 即在所述系统信息中携带对应终端设备的 RA-RNTI 来指示覆盖增强等级对应的 RA-RNTI。
507、终端设备在 PDCCH信道上按照指定随机接入无线网络临时 标识 RA-RNTI计算公式获取基站发送的下行资源信息。
其中, 所述 RA-RNTI计算公式与步骤 206 中的 RA-RNTI计算公 式相同。
又或者, 在基站获取终端设备发送的 preamble之后, 基站使用 指定下行控制信息 DCI 格式发送下行资源信息, 由于所述指定下行 控制信息 DCI 格式只能被需要覆盖增强的终端设备解析, 所以正常 的终端设备无法解析出 PDCCH 中的指定下行控制信息 DCI 格式发送 下行资源信息, 所以不会影响正常的终端设备接收对应的 RAR。
进一步地, 若获取到基站发送的所述下行资源信息中携带拒绝 接受信息, 终端设备则在预置时间段内停止发送 preamble至所述基 站, 所述拒绝接受信息包括拒绝接受指令和 /或所述预置时间段。 示例性的, 若拒绝接受信息包括拒绝接受指令和所述预置时间 段 1 分钟, 那么终端设备在获取到所述拒绝接受信息后, 在 1 分钟 内不会再发起覆盖增强的接入请求。
需要说明的是, 所述步骤 "获取到基站发送的所述下行资源信 息中携带拒绝接受信息, 终端设备则在预置时间段内停止发送 preamble至所述基站 ", 并不依赖于步骤 501-506 , 可以单独执行。
508、 基站发送随机接入响应 RAR至终端设备。
可选的, 在基站发送的系统信息中还可以包括有接收 RAR的配 置信息, 所述接收 RAR 的配置信息内容为 RAR对应的时频资源, 当 终端设备发送完 preamble后, 根据所述接收 RAR的配置信息在所述 对应的时频资源接收 RAR, 无需在 PDCCH 信道上按照指定随机接入 无线网络临时标识 RA-RNTI 计算公式获取基站发送的下行资源信 息。
509、 终端设备接收来自基站的随机接入响应 RAR, 并按照 RAR 携带的重复次数索引所对应的重复次数发送 msg3。
至此, 终端设备获得对应的起始 PRACH资源进而发送 reamble 至所述基站, 以使得基站根据所述 preamble 建立与终端设备的连 接, 使得基站识别需要覆盖增强的终端设备的接入请求同时不影响 其他终端设备的接入。
本发明的实施例提供一种随机接入的方法, 通过获取已经存储 的至少一组物理随机接入信道 PRACH配置信息,所述至少一组 PRACH 配置信息为基站发送的系统信息中携带的; 对所述至少一组 PRACH 配置信息进行解析, 获得对应的起始 PRACH资源; 从所述起始 PRACH 资源处开始发送前导码 preamble至所述基站, 以使得基站根据所述 preamble建立与终端设备的连接。 该方案中, 基站为需要覆盖增强 的终端设备预先配置多组 PRACH 配置信息并发送至终端设备, 以使 得终端设备对 PRACH 配置信息进行解析, 获得对应的起始 PRACH 资 源进而发送 reamble 至所述基站, 以使得基站才艮据所述 reamble 建立与终端设备的连接, 使得基站识别需要覆盖增强的终端设备的 接入请求同时不影响其他终端设备的接入。 实施例七
本发明的实施例提供的一种针对指定业务提高随机接入效率的 方法, 如图 9所示, 包括:
601、终端设备接收基站发送的广播信息中携带的网络拥塞指示 或者指定业务的退避参数。
其中, 所述网络拥塞 ( congestion ) 是指在分组交换网络中传 送分组的数目太多时, 由于存储转发节点的资源有限而造成网络传 输性能下降的情况。 当网络发生拥塞时, 一般会出现数据丟失, 时 延增加, 吞吐量下降, 严重时甚至会导致 "拥塞崩溃" ( congestion collapse )0 通常情况下, 当网络中负载过度增加致使网络性能下降 时, 就会发生网络拥塞。
所述指定业务的退避参数可以包括有用于高优先级接入、 紧急 呼叫、 IMS语音、 IMS视频的接入使用的退避参数。
在随机接入过程中,本发明实施例提供了一种针对指定业务(例 如高优先级接入、 紧急呼叫、 IMS 语音、 IMS 视频等几类业务), 提 高其对应的接入请求的优先级的方法, 以使得这几类接入更容易成 功, 增强用户体验。
602、 终端设备选择对应的 PRACH资源发送前导码 preamble至 基站。
其中,终端设备向基站发送的 preamble的接入类型为高优先级 接入、 紧急呼叫、 IMS ( IP multimedia subsystem IP 多媒体子系 统) 语音、 IMS视频中的一种。
具体的,终端设备触发指定业务向基站发送 preamble请求进行 随机接入,基站在收到对应的 preamble后决定是否建立与终端设备 的连接, 若基站允许终端设备接入, 则发送随机接入响应消息 RAR 至终端设备, 该随机接入响应消息中可以包含有与 preamble对应的 随机接入码标识。 603、终端设备接收基站发送的随机接入响应消息或者 MAC头或 MAC子头中携带的网络拥塞指示或者指定业务的退避参数。
其中, 所述网络拥塞指示或者所述指定业务的退避参数可以在 基站发送的广播信息中携带, 也可以在基站发送的随机接入响应消 息或者 MAC (Media Access Control , 介质访问控制)头或 MAC 子头 中携带。 所述 MAC 是解决当局域网中共用信道的使用产生竟争时, 如何分配信道的使用权问题。
需要说明的是, 步骤 601 与 603详细阐述了所述网络拥塞指示 或者指定业务的退避参数的获取方法, 所以步骤 601 与 603可以选 择其中之一执行。
604、 终端设备判断是否接收到与 preamble对应的随机接入码 标识。
605、 若终端设备没有接收到与 preamble对应的随机接入码标 识, 则根据网络拥塞指示或者指定业务的退避参数执行指定操作。
若终端设备接收到网络拥塞指示, 且终端设备没有接收到与 preamble对应的随机接入码标识, 那么终端设备则不执行退避操作 ( backoff ), 进而继续选择合适的随机接入资源发起接入。
若终端设备接收到指定业务的退避参数, 且终端设备没有接收 到与 preamble对应的随机接入码标识, 那么终端设备则基于所述指 定业务的退避参数执行退避操作 ( backoff ), 然后选择合适的随机 接入资源发起接入。
其中, 所述退避参数为退避参数值索引或退避参数比例。
本发明的实施例提供了一种针对指定业务提高随机接入效率的 方法, 通过终端设备从起始 PRACH资源处开始发送前导码 preamble 至所述基站; 接收网络拥塞指示或者指定业务的退避参数; 判断是 否接收到与 preamble对应的随机接入码标识; 若终端设备没有接收 到与 preamble对应的随机接入码标识, 则根据网络拥塞指示或者指 定业务的退避参数执行指定操作。 该方案根据网络拥塞指示或者指 定业务的退避参数执行指定操作, 提高了制定业务对应的接入请求 的优先级, 以使得这几类业务的接入更容易成功, 增强用户体验。 本文中结合终端和 /或基站和 /或基站控制器来描述各种方面。 用户设备, 可以是无线终端也可以是有线终端, 无线终端可以 是指向用户提供语音和 /或数据连通性的设备, 具有无线连接功能的 手持式设备、 或连接到无线调制解调器的其他处理设备。 无线终端 可以经无线接入网 (例如, RAN, Radio Access Network ) 与一个或 多个核心网进行通信, 无线终端可以是移动终端, 如移动电话 (或 称为 "蜂窝" 电话) 和具有移动终端的计算机, 例如, 可以是便携 式、 袖珍式、 手持式、 计算机内置的或者车载的移动装置, 它们与 无线接入网交换语言和 /或数据。例如,个人通信业务( PCS, Personal Communication Service ) 电话、 无绳电话、 会话发起协议 ( SIP ) 话机、 无线本地环路 ( WLL, Wireless Local Loop ) 站、 个人数字 助理 ( PDA, Personal Digital Assistant ) 等设备。 无线终端也可 以称为系统、 订户单元 ( Subscriber Unit )、 订户站 ( Subscriber Station ), 移动站 ( Mobile Station ), 移动台 ( Mobile ), 远程站 ( Remote Station ), 接入点 ( Access Point )、 远程终端 ( Remote Terminal )、 接入终端 ( Access Terminal )、 用 户 终端 ( User Terminal ), 用户代理 ( User Agent )、 用户设备 ( User Device ), 或用户装备 ( User Equipment )。
基站 (例如, 接入点) 可以是指接入网中在空中接口上通过一 个或多个扇区与无线终端通信的设备。 基站可用于将收到的空中帧 与 IP分组进行相互转换, 作为无线终端与接入网的其余部分之间的 路由器, 其中接入网的其余部分可包括网际协议 ( IP ) 网络。 基站 还可协调对空中接口的属性管理。 例如, 基站可以是 GSM或 CDMA中 的基站 ( BTS, Base Transceiver Station ), 也可以是 WCDMA 中的 基站 ( NodeB ), 还可以是 LTE 中的演进型基站 ( NodeB 或 eNB 或 e-NodeB, evolutional Node B ), 本发明并不限定。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁, 仅以上述各功能模块的划分进行举例说明, 实际应用中, 可以根据 需要而将上述功能分配由不同的功能模块完成, 即将装置的内部结 构划分成不同的功能模块, 以完成以上描述的全部或者部分功能。 上述描述的系统, 装置和单元的具体工作过程, 可以参考前述方法 实施例中的对应过程, 在此不再赘述。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的系统, 装置和方法, 可以通过其它的方式实现。 例如, 以上所描述的装置 实施例仅仅是示意性的, 例如, 所述模块或单元的划分, 仅仅为一 种逻辑功能划分, 实际实现时可以有另外的划分方式, 例如多个单 元或组件可以结合或者可以集成到另一个系统, 或一些特征可以忽 略, 或不执行。 另一点, 所显示或讨论的相互之间的耦合或直接耦 合或通信连接可以是通过一些接口, 装置或单元的间接耦合或通信 连接, 可以是电性, 机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分 开的, 作为单元显示的部件可以是或者也可以不是物理单元, 即可 以位于一个地方, 或者也可以分布到多个网络单元上。 可以根据实 际的需要选择其中的部分或者全部单元来实现本实施例方案的 目 的。
另外, 在本发明各个实施例中的各功能单元可以集成在一个处 理单元中, 也可以是各个单元单独物理存在, 也可以两个或两个以 上单元集成在一个单元中。 上述集成的单元既可以釆用硬件的形式 实现, 也可以釆用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的 产品销售或使用时, 可以存储在一个计算机可读取存储介质中。 基 于这样的理解, 本发明的技术方案本质上或者说对现有技术做出贡 献的部分或者该技术方案的全部或部分可以以软件产品的形式体现 出来, 该计算机软件产品存储在一个存储介质中, 包括若干指令用 以使得一台计算机设备 (可以是个人计算机, 服务器, 或者网络设 备等) 或处理器 ( p r o c e s s o r ) 执行本发明各个实施例所述方法的全 部或部分步骤。 而前述的存储介质包括: U 盘、 移动硬盘、 只读存 储器( ROM, Read-Only Memory )、随机存取存储器( RAM, Random Access Memory )、 磁碟或者光盘等各种可以存储程序代码的介质。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不 局限于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范 围内, 可轻易想到变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保护范围应以所述权利要求的保护范围为准。

Claims

权 利 要 求 书
1、 一种终端设备, 其特征在于, 包括:
第一获取单元,用于获取已经存储的至少一组物理随机接入信道 PRACH配置信息, 所述至少一组 PRACH配置信息为基站发送的系统信 息中携带的;
处理单元, 用于对所述至少一组 PRACH配置信息进行解析, 获得 对应的起始 PRACH资源;
第一发送单元, 用于从所述起始 PRACH 资源处开始发送前导码 preamble至所述基站, 以使得基站才艮据所述 reamble建立与终端设 备的连接。
2、 根据权利要求 1 所述的终端设备, 其特征在于, 所述系统消 息中至少包括所述至少一组 PRACH配置信息, 其中, 所述 PRACH配置 信息的内容包括预置周期时间和 /或预置起始位置。
3、 根据权利要求 1或 2所述的终端设备, 其特征在于,
所述第一获取单元, 还用于接收来自所述基站的所述系统消息; 所述处理单元,还用于根据下行信息计算信号传输过程中的路径 损耗, 并根据所述路径损耗确定匹配的覆盖增强等级。
4、 根据权利要求 1至 3 中任一项所述的终端设备, 其特征在于, 所述第一获取单元,还用于在 PDCCH信道上按照指定随机接入无 线网络临时标识 RA-RNTI计算公式获取基站发送的下行资源信息; 以 及根据解扰后的下行资源信息所指定的信道接收来自所述基站的随 机接入响应 RAR, 并按照所述 RAR携带的重复次数索引所对应的重复 次数发送 msg3。
5、 根据权利要求 1至 4 中任一项所述的终端设备, 其特征在于, 所述终端设备还包括:
判断单元,用于若获取到的所述下行资源信息中携带拒绝接受信 息, 则在预置时间段内停止发送 preamble 至所述基站, 所述拒绝接 受信息包括拒绝接受指令和 /或所述预置时间段。
6、 根据权利要求 1至 5 中任一项所述的终端设备, 其特征在于, 所述第一获取单元,还用于在 PDCCH信道上获取所述基站发送的 指定下行控制信息 DCI格式的下行资源信息;
所述第一发送单元,还用于根据所述指定 DCI格式的下行资源信 息接收来自所述基站的 RAR, 并按照所述 RAR携带的复次数索引所对 应的重复次数发送 msg3。
7、 根据权利要求 1至 6 中任一项所述的终端设备, 其特征在于, 所述接收来自所述基站的所述系统消息中包含有多组 PRACH 配置信 息, 每一组 PRACH配置信息对应一个覆盖增强等级, 其中,
所述处理单元,具体用于根据所述匹配的覆盖增强等级匹配对应 的 PRACH配置信息; 以及根据匹配的 PRACH配置信息获取对应的所述 起始 PRACH资源。
8、 根据权利要求 1至 7 中任一项所述的终端设备, 其特征在于, 所述来 自 所述基站的所述系统消息还包括至少一组接入类别阻 止 EACB 参数, 每一组 EACB 参数对应一个覆盖增强等级, 其中, 所述处理单元,还用于根据所述对应的覆盖增强等级选择对应的 EACB 参数, 进而根据所述 EACB 参数判断所述基站是否允许接入,所 述 EACB 参数判断的结果用于指示是否从所述起始 PRACH资源处按照 预设频率发送 preamble至所述基站。
9、 根据权利要求 1至 8 中任一项所述的终端设备, 其特征在于, 所述判断单元,还用于若所述 EACB参数判断的结果为允许接入, 则执行增强接入拒绝 EAB 判决和 /或 ACB 判决, 所述 EAB 判决和 /或 ACB判决的结果用于指示是否从所述起始 PRACH资源处按照预设频率 发送 reamble至所述基站。
10、 一种基站, 其特征在于, 包括:
配置单元, 用于对物理随机接入信道 PRACH资源进行预配置, 并 生成至少一组 PRACH配置信息发送至终端设备, 以使得所述终端设备 则获取所述至少一组 PRACH配置信息; 以及所述终端设备根据所述至 少一组 PRACH配置信息匹配对应的起始 PRACH资源, 所述 PRACH配置 信息的内容包括预置周期时间和 /或预置起始位置; 第二获取单元, 用于接收来自所述终端设备的 preamble, 并对 所述起始 PRACH 资源处对应的下行资源信息按照指定随机接入无线 网络临时标识 RA-RNT I计算公式进行加扰;
第二发送单元,用于在 PDCCH信道上发送加扰后的下行资源信息 至所述终端设备, 以使得所述终端设备在 PDCCH信道上获取加扰后的 下行资源信息并按照所述指定 RA-RNTI 计算公式对所述下行资源信 息进行解扰。
11、 根据权利要 10所述的基站, 其特征在于,
所述第二发送单元,还用于发送随机接入响应 RAR至所述终端设 备, 以使得所述终端设备按照所述 RAR携带的重复次数索引所对应的 重复次数发送 msg3。
12、 根据权利要 10或 11所述的基站, 其特征在于,
所述第二发送单元,还用于在所述 PDCCH信道上发送拒绝接受信 息至所述终端设备, 以使得所述终端设备在预置时间段内停止发送 preamb le, 所述拒绝接受信息包括拒绝接受指令和 /或所述预置时间 段。
13、 根据权利要 10至 12 中任一项所述的基站, 其特征在于, 所述第二发送单元,还用于在所述 PDCCH信道上发送指定下行控 制信息 DCI格式的下行资源信息至所述终端设备, 以使得所述终端设 备接收所述指定 DCI 格式的下行资源信息; 以及等待预置处理时间 后, 发送随机接入响应 RAR至所述终端设备, 以使得所述终端设备按 照所述 RAR携带的重复次数索引所对应的重复次数发送 msg3。
14、 根据权利要求 10至 13 中任一项所述的基站, 其特征在于, 所述配置单元, 还用于配置至少一组接入类别阻止 EACB参数并 发送至所述终端设备, 其中, 每一组 EACB 参数对应一个覆盖增强等 级。
15、 一种终端设备, 其特征在于, 包括:
接收器, 用于获取已经存储的至少一组物理随机接入信道 PRACH 配置信息, 所述至少一组 PRACH配置信息为基站发送的系统信息中携 带的;
处理器, 用于对所述至少一组 PRACH配置信息进行解析, 获得对 应的起始 PRACH资源;
发送器,用于从所述起始 PRACH资源处开始发送前导码 preamble 至所述基站, 以使得基站根据所述 preamble建立与终端设备的连接。
16、 根据权利要求 15 所述的终端设备, 其特征在于, 所述系统 消息中至少包括所述至少一组 PRACH配置信息, 其中, 所述 PRACH配 置信息的内容包括预置周期时间和 /或预置起始位置。
17、 根据权利要求 15或 16所述的终端设备, 其特征在于, 所述接收器, 还用于接收来自所述基站的所述系统消息; 所述处理器,还用于根据下行信息计算信号传输过程中的路径损 耗, 并根据所述路径损耗确定匹配的覆盖增强等级。
18、 根据权利要求 15至 17 中任一项所述的终端设备, 其特征在 于,
所述发送器,还用于在 PDCCH信道上按照指定随机接入无线网络 临时标识 RA-RNTI计算公式获取基站发送的下行资源信息;
所述接收器,还用于根据解扰后的下行资源信息所指定的信道接 收来自所述基站的随机接入响应 RAR, 并按照所述 RAR携带的重复次 数索引所对应的重复次数发送 msg3。
19、 根据权利要求 15至 18 中任一项所述的终端设备, 其特征在 于,
所述处理器,还用于若获取到的所述下行资源信息中携带拒绝接 受信息, 则在预置时间段内停止发送 preamble 至所述基站, 所述拒 绝接受信息包括拒绝接受指令和 /或所述预置时间段。
20、 根据权利要求 15至 19 中任一项所述的终端设备, 其特征在 于,
所述接收器,还用于在 PDCCH信道上获取所述基站发送的指定下 行控制信息 DCI格式的下行资源信息; 以及根据所述指定 DCI格式的 下行资源信息接收来自所述基站的 RAR, 并按照所述 RAR携带的复次 数索引所对应的重复次数发送 msg3。
21、 根据权利要求 15至 20中任一项所述的终端设备, 其特征在 于, 所述接收来自所述基站的所述系统消息中包含有多组 PRACH配置 信息, 每一组 PRACH配置信息对应一个覆盖增强等级, 其中,
所述处理器,具体用于根据所述匹配的覆盖增强等级匹配对应的 PRACH配置信息; 以及根据匹配的 PRACH配置信息获取对应的所述起 始 PRACH资源。
22、 根据权利要求 15至 21 中任一项所述的终端设备, 其特征在 于, 所述来自所述基站的所述系统消息还包括至少一组接入类别阻 止 EACB 参数, 每一组 EACB 参数对应一个覆盖增强等级, 其中, 所述处理器, 还用于根据所述对应的覆盖增强等级选择对应的 EACB 参数, 进而根据所述 EACB 参数判断所述基站是否允许接入,所 述 EACB 参数判断的结果用于指示是否从所述起始 PRACH资源处按照 预设频率发送 preamble至所述基站。
23、 根据权利要求 15至 11 中任一项所述的终端设备, 其特征在 于,
所述处理器, 还用于若所述 EACB 参数判断的结果为允许接入, 则执行增强接入拒绝 EAB 判决和 /或 ACB 判决, 所述 EAB 判决和 /或 ACB判决的结果用于指示是否从所述起始 PRACH资源处按照预设频率 发送 reamble至所述基站。
24、 一种基站, 其特征在于, 包括:
处理器, 用于对物理随机接入信道 PRACH资源进行预配置, 并生 成至少一组 PRACH配置信息发送至终端设备, 以使得所述终端设备则 获取所述至少一组 PRACH配置信息; 以及所述终端设备根据所述至少 一组 PRACH配置信息匹配对应的起始 PRACH资源, 所述 PRACH配置信 息的内容包括预置周期时间和 /或预置起始位置;
接收器, 用于接收来自所述终端设备的 preamble, 并对所述起 始 PRACH 资源处对应的下行资源信息按照指定随机接入无线网络临 时标识 RA-RNTI计算公式进行加扰; 发送器,用于在 PDCCH信道上发送加扰后的下行资源信息至所述 终端设备, 以使得所述终端设备在 PDCCH信道上获取加扰后的下行资 源信息并按照所述指定 RA-RNTI 计算公式对所述下行资源信息进行 解扰。
25、 根据权利要求 24所述的基站, 其特征在于,
所述发送器, 还用于发送随机接入响应 RAR至所述终端设备, 以 使得所述终端设备按照所述 RAR 携带的重复次数索引所对应的重复 次数发送 msg3。
26、 根据权利要求 24或 25所述的基站, 其特征在于,
所述接收器,还用于在所述 PDCCH信道上发送拒绝接受信息至所 述终端设备, 以使得所述终端设备在预置时间段内停止发送 preamb le, 所述拒绝接受信息包括拒绝接受指令和 /或所述预置时间 段。
27、 根据权利要求 24至 26 中任一项所述的基站, 其特征在于, 所述发送器,还用于在所述 PDCCH信道上发送指定下行控制信息
DCI格式的下行资源信息至所述终端设备, 以使得所述终端设备接收 所述指定 DCI格式的下行资源信息; 以及等待预置处理时间后, 发送 随机接入响应 RAR 至所述终端设备, 以使得所述终端设备按照所述 RAR携带的重复次数索引所对应的重复次数发送 msg3。
28、 根据权利要求 24至 27 中任一项所述的基站, 其特征在于, 所述处理器, 还用于配置至少一组接入类别阻止 EACB参数并发 送至所述终端设备, 其中, 每一组 EACB参数对应一个覆盖增强等级。
29、 一种随机接入的方法, 其特征在于, 包括:
获取已经存储的至少一组物理随机接入信道 PRACH配置信息,所 述至少一组 PRACH配置信息为基站发送的系统信息中携带的;
对所述至少一组 PRACH 配置信息进行解析, 获得对应的起始 PRACH资源;
从所述起始 PRACH资源处开始发送前导码 preamble至所述基站 , 以使得基站根据所述 preamble建立与终端设备的连接。
30、 根据权利要求 29 所述的方法, 其特征在于, 所述系统消息 中至少包括所述至少一组 PRACH配置信息, 其中, 所述 PRACH配置信 息的内容包括预置周期时间和 /或预置起始位置。
31、 根据权利要求 29或 30所述的方法, 其特征在于, 在所述获 取已经存储的 PRACH配置信息之前, 还包括:
接收来自所述基站的所述系统消息;
根据下行信息计算信号传输过程中的路径损耗,并根据所述路径 损耗确定匹配的覆盖增强等级。
32、 根据权利要求 29至 31 中任一项所述的方法, 其特征在于, 在从所述起始 PRACH 资源处开始发送前导码 preamble至所述基站之 后, 还包括:
在 PDCCH 信道上按照指定随机接入无线网络临时标识 RA-RNTI 计算公式获取基站发送的下行资源信息;
根据解扰后的下行资源信息所指定的信道接收来自所述基站的 随机接入响应 RAR, 并按照所述 RAR携带的重复次数索引所对应的重 复次数发送 msg3。
33、 根据权利要求 29至 32 中任一项所述的方法, 其特征在于, 在所述在 PDCCH信道上按照指定随机接入无线网络临时标识 RA-RNTI 计算公式获取基站发送的下行资源信息之后, 还包括:
若获取到的所述下行资源信息中携带拒绝接受信息,则在预置时 间段内停止发送 preamble 至所述基站, 所述拒绝接受信息包括拒绝 接受指令和 /或所述预置时间段。
34、 根据权利要求 29至 33 中任一项所述的方法, 其特征在于, 在所述从所述起始 PRACH资源处开始发送 preamble至所述基站之后, 还包括:
在 PDCCH信道上获取所述基站发送的指定下行控制信息 DCI格式 的下行资源信息;
根据所述指定 DCI 格式的下行资源信息接收来自所述基站的 RAR,并按照所述 RAR携带的复次数索引所对应的重复次数发送 msg3。
35、 根据权利要求 29至 34 中任一项所述的方法, 其特征在于, 所述接收来自所述基站的所述系统消息中包含有多组 PRACH 配置信 息, 每一组 PRACH配置信息对应一个覆盖增强等级,
其中, 所述对所述至少一组 PRACH配置信息进行解析, 获得对应 的起始 PRACH资源, 包括:
根据所述匹配的覆盖增强等级匹配对应的 PRACH配置信息;
居匹配的 PRACH配置信息获取对应的所述起始 PRACH资源。
36、 根据权利要求 29至 35 中任一项所述的方法, 其特征在于, 所述来自所述基站的所述系统消息还包括至少一组接入类别阻止 E ACB 参数, 每一组 EACB 参数对应一个覆盖增强等级,
其中, 在从所述起始 PRACH资源处开始发送 reamble至所述基 站之前, 还包括:
根据所述对应的覆盖增强等级选择对应的 EACB参数, 进而根据 所述 EACB 参数判断所述基站是否允许接入,所述 EACB参数判断的结 果用 于指示是否从所述起始 PRACH 资源处按照预设频率发送 preamble至所述基站。
37、 根据权利要求 29至 36 中任一项所述的方法, 其特征在于, 在所述根据所述 EACB参数判断所述基站是否允许接入之后,还包括: 若所述 EACB参数判断的结果为允许接入, 则执行增强接入拒绝 EAB判决和 /或 ACB判决, 所述 EAB判决和 /或 ACB判决的结果用于指 示是否从所述起始 PRACH 资源处按照预设频率发送 preamble至所述 基站。
38、 一种随机接入的方法, 其特征在于, 包括:
对物理随机接入信道 PRACH 资源进行预配置, 并生成至少一组 PRACH配置信息发送至终端设备, 以使得所述终端设备则获取所述至 少一组 PRACH配置信息; 以及所述终端设备根据所述至少一组 PRACH 配置信息匹配对应的起始 PRACH资源, 所述 PRACH配置信息的内容包 括预置周期时间和 /或预置起始位置;
接收来自所述终端设备的 preamble, 并对所述起始 PRACH 资源 处对应的下行资源信息按照指定随机接入无线网络临时标识 R A-RNT I 计算公式进行加扰;
在 PDCCH信道上发送加扰后的下行资源信息至所述终端设备,以 使得所述终端设备在 PDCCH 信道上获取加扰后的下行资源信息并按 照所述指定 RA-RNTI计算公式对所述下行资源信息进行解扰。
39、 根据权利要求 38所述的方法, 其特征在于, 在所述在 PDCCH 信道上发送加扰后的下行资源信息至所述终端设备之后, 还包括: 发送随机接入响应 RAR至所述终端设备,以使得所述终端设备按 照所述 RAR携带的重复次数索引所对应的重复次数发送 msg3。
40、 根据权利要求 38或 39所述的方法, 其特征在于, 在所述接 收来自所述终端设备的 preamble之后, 还包括:
在所述 PDCCH信道上发送拒绝接受信息至所述终端设备,以使得 所述终端设备在预置时间段内停止发送 preamble, 所述拒绝接受信 息包括拒绝接受指令和 /或所述预置时间段。
41、 根据权利要求 39至 40 中任一项所述的方法, 其特征在于, 在所述接收来自所述终端设备的 preamble之后, 还包括:
在所述 PDCCH信道上发送指定下行控制信息 DCI格式的下行资源 信息至所述终端设备, 以使得所述终端设备接收所述指定 DCI格式的 下行资源信息;
等待预置处理时间后, 发送随机接入响应 RAR至所述终端设备, 以使得所述终端设备按照所述 RAR 携带的重复次数索引所对应的重 复次数发送 msg3。
42、 根据权利要求 39至 41 中任一项所述的方法, 其特征在于, 所述对物理随机接入信道 PRACH 资源进行预配置, 并生成至少一组 PRACH配置信息发送至终端设备, 还包括:
配置至少一组接入类别阻止 EACB 参数并发送至所述终端设备, 其中, 每一组 EACB 参数对应一个覆盖增强等级。
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EP3944713A1 (en) 2022-01-26
CN110312319A (zh) 2019-10-08
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US10455620B2 (en) 2019-10-22
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