WO2017166255A1 - Procédé, dispositif et système pour effectuer une transmission sur un canal d'accès aléatoire physique (prach) - Google Patents

Procédé, dispositif et système pour effectuer une transmission sur un canal d'accès aléatoire physique (prach) Download PDF

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Publication number
WO2017166255A1
WO2017166255A1 PCT/CN2016/078226 CN2016078226W WO2017166255A1 WO 2017166255 A1 WO2017166255 A1 WO 2017166255A1 CN 2016078226 W CN2016078226 W CN 2016078226W WO 2017166255 A1 WO2017166255 A1 WO 2017166255A1
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WIPO (PCT)
Prior art keywords
subframe
prach resource
time period
random access
indication signaling
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PCT/CN2016/078226
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English (en)
Chinese (zh)
Inventor
吴作敏
官磊
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华为技术有限公司
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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 PCT/CN2016/078226 priority Critical patent/WO2017166255A1/fr
Priority to CN201680084047.8A priority patent/CN108886811B/zh
Publication of WO2017166255A1 publication Critical patent/WO2017166255A1/fr

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

Definitions

  • the present invention relates to the field of communications and, more particularly, to a method, apparatus and system for transmitting a physical random access channel PRACH.
  • LAA-LTE Licensed-Assisted Access Using LTE
  • uplink transmission also needs to be considered in LAA-LTE.
  • PRACH physical random access channel
  • TA Timing Advance
  • the terminal device also needs to send a PRACH for random access in consideration of a dual connectivity scenario or a stand-alone Long Term Evolution (SA-LTE) scenario. Therefore, the terminal device needs to send the PRACH on the unlicensed spectrum resource.
  • SA-LTE Stand-alone Long Term Evolution
  • Frame structure 3 is used when the LTE system is applied to the carrier of the unlicensed spectrum.
  • One frame of the frame structure 3 includes 10 downlink subframes, and the downlink transmission occupies one or more consecutive subframes. If an uplink transmission is introduced in the future, the uplink transmission also occupies one or more consecutive subframes. Therefore, the frame structure 3 is more like a Time Division Duplex (TDD) frame structure with flexible uplink and downlink ratio. Since the device needs to perform channel interception when transmitting data on the frame structure 3, if the location of the PRACH resource in one radio frame is defined according to the existing manner, a pre-defined resource for PRACH transmission may actually be transmitted. The situation is the downlink data. Therefore, it can be seen that the method of transmitting PRACH in the prior art is no longer applicable to the carrier of the unlicensed spectrum resource.
  • TDD Time Division Duplex
  • the present application provides a method of transmitting information, which is intended to provide an implementation for transmitting PRACH on a carrier of a license-free spectrum resource.
  • the present application provides a method for transmitting a PRACH, where the method includes: the access network device sends the first indication signaling in a first time period, where the first indication signaling includes the first a PRACH resource indication information, where the first PRACH resource indication information is used to indicate time domain location information of the first PRACH resource in a second time period, where the first PRACH resource is a terminal in a cell serving the access network device And configured by the device, the first indication signaling is physical layer signaling; the access network device detects a random access preamble sequence on the first PRACH resource in the second time period.
  • the access network device sends the first indication signaling in a first time period, including: the access network device is in the first The first indication signaling is sent on the subframe n in the time range, where n is an integer greater than or equal to 0, where the subframe n and the starting subframe in the second time period meet the following conditions: At least one of the offset values of the start subframe and the last subframe of the downlink burst in which the subframe n is located is a fixed value; the offset of the start subframe from the subframe n The value is a fixed value; the starting subframe is a first uplink partial subframe after the subframe n+k, and the uplink partial subframe is a subframe in which at least one symbol is not used for uplink transmission, k ⁇ 1; The initial subframe is the first uplink complete subframe after the subframe n+k, and the uplink complete subframe is an uplink subframe in which all symbols in one subframe are used for uplink transmission
  • the access network device sends the first indication signaling in a first time period, including at least one of the following manners: the access The network device sends the first indication signaling in a first subframe of a downlink burst, where the first time period is the one downlink burst; the access network device is in a downlink burst Sending the first indication signaling on a last subframe of the sending, where the first time period is the one downlink burst; and the access network device discovers the reference in the first time period
  • the first indication signaling is sent on a signal DRS subframe.
  • the method further includes: the access network device sends a second indication signaling to the first terminal device, where the second indication signaling is The terminal device-specific signaling, the first terminal device is one of the terminal devices in the cell served by the access network device, and the second indication signaling includes the second PRACH resource indication information, where the The second PRACH resource indication information includes at least one of the following information: a sequence identifier of a random access preamble sequence carried on the second PRACH resource; a format of the random access preamble sequence carried on the second PRACH resource; and a second PRACH resource Time domain location information; frequency domain location information of the second PRACH resource, the second PRACH resource is different from the first PRACH resource, and the second PRACH resource is used by the first terminal device to perform random access.
  • the second indication signaling is The terminal device-specific signaling
  • the first terminal device is one of the terminal devices in the cell served by the access network device
  • the second indication signaling includes the second PRACH resource indication information
  • the second PRACH resource indication information includes at least one of the
  • the application provides a method for sending a PRACH, where the method includes: setting a terminal Receiving the first indication signaling in the first time period, where the first indication signaling includes the first PRACH resource indication information, where the first PRACH resource indication information is used to indicate that the first PRACH resource is in the second Time domain location information in a time range, the first PRACH resource is configured by a terminal device in a cell that the access network device serves for the access network device, and the first indication signaling is physical layer signaling; The terminal device sends a random access preamble sequence on the first PRACH resource in the second time period.
  • the terminal device receives the first indication signaling in the first time period, including: the terminal device is in the first time period The first indication signaling is received on the subframe n, where n is an integer greater than or equal to 0, wherein the subframe n and the starting subframe in the second time period satisfy at least one of the following conditions: The offset value of the start subframe and the last subframe in the downlink burst where the subframe n is located is a fixed value; the offset value of the start subframe and the subframe n is a fixed value.
  • the starting subframe is a first uplink partial subframe after the subframe n+k, and the uplink partial subframe is a subframe in which at least one symbol is not used for uplink transmission, k ⁇ 1; the initiator
  • the frame is the first uplink complete subframe after the subframe n+k, and the uplink complete subframe is an uplink subframe in which all symbols in one subframe are used for uplink transmission, and k ⁇ 1.
  • the terminal device receives the first indication signaling in the first time period, including at least one of the following manners: the terminal device is once Receiving, by the first subframe in the downlink burst, the first indication signaling, where the first time period is the first downlink burst; and the terminal device is the last one of the downlink bursts Receiving, by the frame, the first indication signaling, where the first time period is the one downlink downlink burst; the terminal device receiving the discovery reference signal DRS subframe in the first time period The first indication signaling.
  • the present application provides a method for transmitting a PRACH, where the method includes: receiving, by a first terminal device, a first indication signaling, where the first indication signaling includes a first PRACH resource indication information.
  • the first PRACH resource indication information is used to indicate time domain location information of the first PRACH resource in a second time period, where the first PRACH resource is used by an access network device to serve the access network device.
  • the first indication signaling configured by the terminal device in the cell is physical layer signaling.
  • the first terminal device receives the first indication signaling in the first time period, including: the first terminal device is in the first The first indication signaling is received on the subframe n in the time period, where n is an integer greater than or equal to 0, where The subframe n and the start subframe in the second time period satisfy at least one of the following conditions: the start subframe and the last subframe of the downlink burst where the subframe n is located
  • the offset value is a fixed value
  • the offset value of the start subframe and the subframe n is a fixed value
  • the start subframe is the first uplink subframe after the subframe n+k
  • the uplink partial subframe is a subframe in which at least one symbol is not used for uplink transmission, and k ⁇ 1
  • the initial subframe is a first uplink complete subframe after the subframe n+k
  • the uplink complete subframe is All symbols in one subframe are used for uplink subframes of uplink transmission, k ⁇ 1.
  • the first terminal device receives the first indication signaling in the first time period, including at least one of the following manners: the first The terminal device receives the first indication signaling in a first subframe of a downlink burst, where the first time period is the one downlink burst; the first terminal device is in a downlink downlink Receiving the first indication signaling in a last subframe of the sending, where the first time period is the one downlink burst; the first terminal device is found in the first time period The first indication signaling is received on a signal DRS subframe.
  • the method further includes: receiving, by the first terminal device, the second indication signaling sent by the access network device, where the second indication The signaling is the terminal device-specific signaling, the first terminal device is one of the terminal devices in the cell served by the access network device, and the second indication signaling includes the second PRACH resource indication information, where
  • the second PRACH resource indication information includes at least one of the following information: a sequence identifier of a random access preamble sequence carried on the second PRACH resource; a format of a random access preamble sequence carried on the second PRACH resource; and a second PRACH
  • the first terminal device sends a third random access preamble sequence on the second PRACH resource.
  • the present application provides a communication system, including the access network device in the first aspect, and the terminal device in the second aspect.
  • the communication system further comprises the first terminal device in the third aspect.
  • the time domain location information includes at least one of the following information: whether the first PRACH resource exists in the second time period; the first PRACH resource is in the Location information of the subframe in the second time period; location information of the symbol in which the first PRACH resource is located in the second time period.
  • the time domain location information implicitly indicates format information of a random access preamble sequence carried on the first PRACH resource.
  • the frequency domain location occupied by the first PRACH resource includes at least one of the following conditions:
  • the system bandwidth includes 100 RBs, and the 100 RBs are numbered from 1 to 100, and the number of resource blocks RB occupied by the first PRACH resource is 10, 11, 12, 13, 14, 15, 86, 87, 88. , 89, 90, 91;
  • the system bandwidth includes 50 RBs, and the 50 RBs are numbered from 1 to 50, and the resource blocks RB occupied by the first PRACH resource are numbered 5, 6, 7, 8, 9, 10, 41, 42, 43 44, 45, 46.
  • the first PRACH resource indication information includes a configuration index of the first PRACH resource in the second time period, where the time domain location information is indicated by the configuration index,
  • the configuration index is further used to indicate a format of a random access preamble sequence carried on the first PRACH resource, a frequency domain location of the first PRACH resource, a zero correlation zone configuration parameter, a root sequence generation parameter, and a random access wireless
  • the network temporarily identifies at least one of the RA-RNTIs, wherein the generation parameters of the root sequence are used to generate a root sequence of the random access preamble sequence.
  • the first indication signaling further includes at least one of the following information: a format of a random access preamble sequence carried on the first PRACH resource; a frequency of the first PRACH resource a domain location; a zero-correlation zone configuration parameter; a root sequence generation parameter, used to generate a root sequence of the random access preamble sequence; and a random access radio network temporary identifier RA-RNTI.
  • the first PRACH resource includes a first resource block RB and a second RB, where a frequency domain interval between the first RB and the second RB is greater than or equal to a preset frequency domain. interval.
  • the application provides an access network device for transmitting a PRACH, for performing the method in the first aspect or any possible implementation manner of the first aspect.
  • the access network device comprises means for performing the method of the first aspect or any of the possible implementations of the first aspect.
  • the application provides a terminal device for transmitting PRACH, which is used to perform the method in any of the possible implementations of the second aspect or the second aspect.
  • the terminal device comprises means for performing the method of any of the second aspect or any of the possible implementations of the second aspect.
  • the application provides a terminal device for transmitting PRACH, which is used to execute a third party.
  • a terminal device for transmitting PRACH, which is used to execute a third party.
  • the terminal device comprises means for performing the method of any of the third aspect or any of the possible implementations of the third aspect.
  • the application provides an access network device for transmitting a PRACH, the device comprising: a bus system, a processor transceiver, and a memory.
  • the transceiver, the memory and the processor are connected by a bus system, the memory is for storing instructions, the processor is for executing instructions stored by the memory to control the transceiver to send and receive signals, and when the processor executes the instructions stored in the memory, the processor is Performing the method of the first aspect or any possible implementation of the first aspect.
  • the application provides a terminal device for transmitting PRACH, the terminal device comprising: a bus system, a processor transceiver, and a memory.
  • the transceiver, the memory and the processor are connected by a bus system
  • the memory is for storing instructions
  • the processor is for executing instructions stored by the memory to control the transceiver to send and receive signals
  • the processor executes the instructions stored in the memory, the processor is Performing the method of the second aspect or any possible implementation of the second aspect.
  • the application provides a terminal device for transmitting a PRACH, the terminal device comprising: a bus system, a processor transceiver, and a memory.
  • the transceiver, the memory and the processor are connected by a bus system, the memory is for storing instructions, the processor is for executing instructions stored by the memory to control the transceiver to send and receive signals, and when the processor executes the instructions stored in the memory, the processor is The method of any of the third aspect or any of the possible implementations of the third aspect is performed.
  • the application provides a computer readable medium for storing a computer program, the computer program comprising instructions for performing the method of the first aspect or any of the possible implementations of the first aspect.
  • the present application provides a computer readable medium for storing a computer program, the computer program comprising instructions for performing the method of any of the second aspect or any of the possible implementations of the second aspect.
  • the present application provides a computer readable medium for storing a computer program, the computer program comprising instructions for performing the method of any of the third aspect or any of the possible implementations of the third aspect.
  • FIG. 1 is an application scenario of a method for transmitting a PRACH according to an embodiment of the present invention.
  • Figure 2a shows a schematic diagram of one downlink burst or one uplink burst.
  • Figure 2b illustrates one way of frequency domain resources occupied by a PRACH resource.
  • Figure 2c shows another way of frequency domain resources occupied by a PRACH resource
  • Figure 2d shows yet another way of frequency domain resources occupied by a PRACH resource.
  • FIG. 3 is a schematic interaction diagram of a method of transmitting a PRACH according to an embodiment of the present invention.
  • Figure 4a shows a schematic diagram of the relationship between the first time period and the second time period.
  • Figure 4b shows a schematic diagram of the mapping of format 0 and format 4 of the random access preamble sequence in a normal cyclic prefix subframe.
  • FIG. 5 is a schematic block diagram of an access network device according to an embodiment of the present invention.
  • FIG. 6 is a schematic block diagram of a terminal device according to another embodiment of the present invention.
  • FIG. 7 is a schematic block diagram of a terminal device according to still another embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of an access network device according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a terminal device according to another embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a terminal device according to still another embodiment of the present invention.
  • the present invention describes various embodiments in conjunction with a terminal device.
  • the terminal device may be referred to as a User Equipment (UE), a Terminal (Terminal), a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), and the like.
  • the terminal device can communicate with one or more core networks via a Radio Access Network (RAN).
  • RAN Radio Access Network
  • the terminal device may be a mobile phone (or "cellular" phone), a computer with a mobile terminal, or the like.
  • the terminal device can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device and a terminal device in a future 5G network that exchanges voice and/or data with the wireless access network.
  • the present invention describes various embodiments in connection with an access network device, and the access network device may be LTE system and its evolved system, in particular, an evolved base station (Evolutional Node B, which may be an eNB or an e-NodeB), a macro base station, and a micro base station (also referred to as a "small base station” in the LAA-LTE system or the SA-LTE system. "), a pico base station, an access point (AP) or a transmission point (TP).
  • Evolutional Node B which may be an eNB or an e-NodeB
  • a macro base station which may be an eNB or an e-NodeB
  • a micro base station also referred to as a "small base station” in the LAA-LTE system or the SA-LTE system. "
  • AP access point
  • TP transmission point
  • a physical channel carries data information from higher layers.
  • the physical channel may be a physical downlink channel or a physical uplink channel, where the physical downlink channel includes a physical downlink shared channel (Physical Downlink Shared CHannel, PDSCH), a physical downlink control channel (Physical Downlink Control CHannel, PDCCH), and a physical control format indication channel ( Physical Control Format Indicator CHannel (PCFICH), Physical Hybrid ARQ Indicator CHannel (PHICH), Enhanced-Physical Downlink Control CHannel (EPDCCH), Physical Broadcast CHannel (PBCH) ), Physical Multicast CHannel (PMCH), etc.
  • PCFICH Physical Control Format Indicator CHannel
  • PHICH Physical Hybrid ARQ Indicator CHannel
  • EPDCCH Enhanced-Physical Downlink Control CHannel
  • PBCH Physical Broadcast CHannel
  • PMCH Physical Multicast CHannel
  • the physical uplink channel includes a physical uplink access channel (Physical Uplink Shared CHannel, PUSCH), a physical uplink control channel (Physical Uplink Control CHannel), a physical random access channel (Physical Random Access CHannel, PRACH), and the like. Or a new channel with the same function but different names. It can also be a combination of the above channels.
  • PUSCH Physical Uplink Access channel
  • Physical Uplink Control CHannel Physical Uplink Control CHannel
  • PRACH Physical Random Access CHannel
  • the terminal device When the LAA-LTE system on the carrier of the unlicensed spectrum supports uplink transmission, correspondingly, the terminal device should send a physical random access channel (PRACH) on the carrier of the unlicensed spectrum to obtain the terminal device. Timing Advance (TA) information on the unlicensed carrier.
  • PRACH physical random access channel
  • TA Timing Advance
  • the terminal device needs to send a PRACH for random access, considering that the dual-connection scenario may be supported on the carrier of the unlicensed spectrum, or a stand-alone Long Term Evolution (SA-LTE) scenario in the future system evolution. Therefore, the terminal device needs to send the PRACH on the unlicensed spectrum resource.
  • SA-LTE Stand-alone Long Term Evolution
  • the frame structure 3 supporting the transmission of the unlicensed spectrum resource is more like a time division duplex TDD frame structure with flexible uplink and downlink ratio. Since the device needs to perform channel interception when transmitting data on the frame structure 3, if the location of the PRACH resource in one radio frame is defined according to the existing manner, a pre-defined resource for PRACH transmission may actually be transmitted. The situation is the downlink data. Visible, The method of transmitting PRACH in the prior art is no longer applicable to the carrier of the unlicensed spectrum resource.
  • FIG. 1 illustrates an application scenario of a method of transmitting information according to an embodiment of the present invention.
  • the scenario includes a cell base station 101, a cell base station 102 adjacent to the cell base station 101, and a user equipment 103.
  • the user equipment 103 is smaller than the coverage of the base station 101 and communicates with the cell base station 101.
  • Cell base station 101 and user equipment 103 are communication devices that support communication over unlicensed spectrum resources.
  • the frequency band supported by the cell base station 102 may be the same as the cell base station 101.
  • the cell base station 102 may be the same type of communication device as the cell base station 101, or may be a communication device of a different type from the cell base station 101.
  • the cell base station 101 may be a base station of the LTE system
  • the user equipment 103 is a user equipment of the LTE system
  • the cell base station 102 may be a base station of the LTE system, or may be a wireless fidelity (Wi-Fi) system.
  • Wireless routers wireless repeaters, user equipment.
  • the user equipment 103 transmits a signal to the cell base station 102 through the channel of the unlicensed spectrum
  • the user equipment 103 needs to acquire the channel usage right of the unlicensed spectrum, and follows the resource usage on the unlicensed spectrum. Bandwidth requirements.
  • the downlink burst refers to a subframe used by the access network device to obtain the channel usage right on the carrier of the unlicensed spectrum and used for downlink signal transmission.
  • Figure 2a shows a schematic diagram of one downlink burst or one uplink burst.
  • one downlink burst includes one or more subframes.
  • the number of subframes included in one downlink burst is greater than 1, the subframes included in one downlink burst are consecutive.
  • the first subframe in one downlink burst is a downlink subframe.
  • the last subframe in the one downlink burst is a downlink subframe.
  • the downlink part subframe refers to a downlink subframe in which at least one symbol is not used for downlink transmission.
  • the uplink burst refers to a subframe used for uplink signal transmission after the terminal device obtains the channel usage right on the carrier of the unlicensed spectrum. As shown in FIG. 2a, an uplink burst includes one or more subframes. When the number of subframes included in one uplink burst is greater than 1, the subframes included in one uplink burst are consecutive.
  • the first subframe in one uplink burst is an uplink partial subframe.
  • the last subframe in one uplink burst is an uplink partial subframe.
  • the uplink partial subframe refers to an uplink subframe in which at least one symbol is not used for uplink transmission.
  • the one subframe may be a partial subframe.
  • the downlink transmission part of the subframe may be regarded as a downlink subframe.
  • the uplink transmission part of the subframe can be regarded as an uplink partial subframe. That is, the subframe may be considered to be the last subframe of a downlink burst, and the subframe may be considered to be the first subframe of an uplink burst.
  • a PRACH resource refers to a time domain and a frequency domain resource occupied by a terminal device during a random access preamble sequence transmission process.
  • one PRACH resource occupies six consecutive Resource Blocks (RBs) in the frequency domain.
  • RBs Resource Blocks
  • one PRACH resource includes a first RB and a second RB, where a frequency domain interval between the first RB and the second RB is greater than or equal to a preset frequency domain interval. For example, for a 20M bandwidth system, the difference between the index value of the first RB and the index value of the second RB should be greater than or equal to 88.
  • Figure 2b illustrates one way of frequency domain resources occupied by a PRACH resource.
  • one PRACH resource includes two basic resource units, where one basic resource unit occupies six consecutive RBs in the frequency domain.
  • the first RB and the second RB are respectively the first RB of the two basic resource units, and the frequency domain interval between the first RB and the second RB is greater than or equal to the preset frequency domain interval.
  • Figure 2c shows another way of frequency domain resources occupied by a PRACH resource.
  • the system bandwidth is divided into N frequency domain units, where each frequency domain unit includes M consecutive RBs.
  • a PRACH resource includes N basic resource units, where one basic resource unit occupies 1 RB in the frequency domain.
  • the N RBs are respectively located in the N frequency domain units, and the RBs occupied by the PRACH in each frequency domain unit are the same as the offset values of the first RB in the frequency domain unit.
  • the first RB and the second RB are RBs in the first frequency domain unit and the Nth frequency domain unit, respectively, and the frequency domain interval between the first RB and the second RB is greater than or equal to a preset frequency domain interval.
  • the transmission of the physical uplink channel needs to meet the bandwidth occupation requirement.
  • PRACH, PUSCH, or PUCCH are transmitted in the same subframe.
  • One possible multiplexing method is to divide the system bandwidth into N frequency domain units, where each frequency domain unit includes M consecutive RBs.
  • the RBs in each frequency domain unit having the same offset value as the first RB in the frequency domain unit are grouped into one group, that is, the system resources include M groups, wherein each group includes N RBs.
  • the access network device performs resource allocation in units of groups, and one PRACH or PUSCH or PUCCH occupies at least one group, so that different physical uplink channels are multiplexed in the same subframe.
  • the system bandwidth is 20M, including 100 RBs.
  • the 100 RBs are divided into 10 frequency domain units, each of which includes 10 consecutive RBs.
  • the RBs in each frequency domain unit having the same offset value as the first RB in the frequency domain unit are grouped into one group, that is, the system resources include 10 groups, wherein each group includes 10 RBs. It can be understood that, for the manner of the frequency domain resource occupied by one PRACH resource shown in FIG. 2c, PRACH or PUSCH or PUCCH can be multiplexed in the same subframe.
  • the manner shown in FIG. 2d may be adopted.
  • the 20M system bandwidth is divided into 10 frequency domain units, each frequency domain unit includes 10 consecutive RBs, and the RB of each frequency domain unit having the same offset value as the first RB in the frequency domain unit is
  • the access network device performs resource allocation in groups as an example.
  • a PRACH resource includes two basic resource units, wherein one basic resource unit occupies consecutive 6 RBs in the frequency domain, specifically, the 10th RB of the frequency domain unit #1 and the 1st and 2nd of the frequency domain unit #2 , 3, 4, 5 RBs.
  • the other basic resource unit also occupies six consecutive RBs in the frequency domain, specifically, the sixth, seventh, eighth, ninth, and tenth RBs of the frequency domain unit #9 and the first RB of the frequency domain unit #10.
  • the access network device can still allocate the 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, and 9th groups for PUSCH or PUCCH transmission, wherein the resources of the 2nd, 3rd, 4th, and 5th groups do not include the frequency.
  • the RBs in the domain unit #2 do not include the RBs in the frequency domain unit #9 for the resources of the sixth, seventh, eighth, and ninth groups, that is, the number of RBs included in these groups is nine.
  • a new group may be formed, which includes 16 RBs and still meets the bandwidth occupation requirement.
  • the resource allocation of the uplink PUSCH generally requires that the number of allocated RBs meet the multiple requirements of 2, 3, and 5 in order to implement DFT.
  • the number of RBs in each group in the above new allocation manner still satisfies this requirement.
  • the 10M system bandwidth includes 50 RBs, and the 50 RBs are numbered from 1 to 50.
  • the 50 RBs can be divided into 5 frequency domain units, and each frequency domain unit includes 5 consecutive RBs, each frequency.
  • the RBs in the domain unit that have the same offset value as the first RB in the frequency domain unit are one group, and the access network device performs resource allocation in units of groups.
  • the numbers of the RBs occupied by the PRACH are 5, 6, 7, 8, 9, 10, 41, 42, 43, 44, 45, 46.
  • FIG. 3 shows a schematic interaction diagram 100 of a method of transmitting a PRACH in accordance with an embodiment of the present invention. As shown in FIG. 3, the method 100 includes:
  • the access network device sends the first indication signaling in the first time period.
  • the first indication signaling includes a first PRACH resource indication information, where the first PRACH resource indication information is used to indicate time domain location information of the first PRACH resource in a second time period, where A PRACH resource is configured for a terminal device in a cell served by the access network device.
  • the first indication signaling is physical layer signaling or Radio Resource Control (RRC) signaling or Media Access Control (MAC) layer signaling.
  • RRC Radio Resource Control
  • MAC Media Access Control
  • the first indication signaling is physical layer signaling.
  • the first time period is a downlink burst.
  • the second time period is an uplink burst.
  • Figure 4a shows a schematic diagram of the relationship between the first time period and the second time period.
  • the first time period is a downlink burst
  • the first time period includes five downlink subframes
  • the subframe numbers are 1, 2, 3, 4, and 5, respectively.
  • the second time period is an uplink burst after the first time period, and the second time period includes four uplink subframes, and the subframe numbers are m, m+1, m+2, and m+3, respectively.
  • a time domain resource that is not used for transmission is included between the first time period and the second time period.
  • the second time period may be the latest uplink burst after one downlink burst corresponding to the first time period.
  • the time resource between the second time period and the first time period may also include one or more uplink bursts.
  • the first PRACH resource occupies a continuous 6 RBs in the frequency domain.
  • the first PRACH resource includes a first RB and a second RB, where the first RB is The frequency domain interval between the second RBs is greater than or equal to the preset frequency domain interval.
  • the frequency domain resource occupied by the first PRACH resource includes two basic resource units, where each basic resource unit occupies a continuous 6 RBs in the frequency domain.
  • the first RB and the second RB are respectively the first RB of the two basic resource units, and the frequency domain interval between the first RB and the second RB is greater than or equal to the preset frequency domain interval.
  • the frequency domain resource occupied by the first PRACH resource is fixed in one subframe.
  • the number of 100 RBs included in the frequency domain is numbered from 1 to 100
  • the first PRACH resource occupies 12 RBs in the frequency domain
  • the number of RBs occupied by the RBs is 10, 11, 12, 13, 14, 15, 86, 87, 88, 89, 90, 91.
  • the 50 RBs included in the frequency domain are numbered from 1 to 50
  • the first PRACH resource occupies 12 RBs in the frequency domain
  • the RBs occupied by the RBs are numbered 5 and 6.
  • the user equipment may determine the time domain and the frequency domain location of the first PRACH resource, and perform resource mapping on the PUSCH or PUCCH or other uplink signals.
  • the RB occupied by the PRACH resource should be avoided.
  • the frequency domain resource occupied by the first PRACH resource includes N RBs, where frequency domain intervals between any two adjacent RBs of the N RBs are equal.
  • first RB and the second RB are respectively the first RB and the last RB occupied by the first PRACH resource in the frequency domain, and the frequency domain interval between the first RB and the second RB is greater than or equal to the pre- Set the frequency domain interval.
  • the access network device sends the first indication signaling on a subframe n in a first time period, where n is an integer greater than or equal to 0.
  • n is an integer greater than or equal to 0.
  • the value of n is 0, 5, 20, 100, and so on.
  • the range of values of n is fixed, where the n value is cyclically numbered.
  • n is an integer greater than or equal to 0 and less than or equal to 9, wherein the next subframe of subframe 9 is subframe 0.
  • the offset value of the start subframe in the second time period and the last subframe in the downlink burst where the subframe n is located is a fixed value.
  • the first time period is the downlink burst, and the fixed value is an integer greater than or equal to 0.
  • the subframe n is the downlink subframe #2, and the initial subframe in the second time period and the last downlink in the first time period.
  • the offset of frame #5 is 1 subframe, that is, the starting subframe #m in the second time period is subframe #6.
  • the offset value of 0 specifically means that the last subframe of the first time period is the same as the first subframe of the second time period.
  • the subframe, that is, the last subframe of the first time period and the first subframe of the second time period are both partial subframes.
  • the offset value of the starting subframe and the subframe n in the second time period is a fixed value.
  • the starting subframe in the second time period is the first uplink partial subframe after the subframe n+k
  • the uplink partial subframe is a subframe in which at least one symbol is not used for uplink transmission, where k is greater than Or an integer equal to 1.
  • the starting subframe in the second time period is the first uplink complete subframe after the subframe n+k, and the uplink complete subframe is an uplink of all uplinks in one subframe.
  • Subframe, k is an integer greater than or equal to 1.
  • the access network device sends the first indication signaling in the first subframe of the one downlink burst, where the first time period is the one downlink burst.
  • the access network device sends the first indication signaling on the first complete subframe of the one downlink burst.
  • the access network device sends the first indication signaling in a last subframe of the one downlink burst, where the first time period is the one downlink burst.
  • the access network device sends the first indication signaling on the discovery reference signal DRS subframe in the first time period.
  • the time domain location information of the first PRACH resource in the second time period includes at least one of the following situations:
  • the location information of the symbol where the first PRACH resource is located in the second time period is located in the second time period.
  • the format 0 of the random access preamble sequence usually occupies 1 subframe, wherein the valid information part of the random access preamble sequence occupies 800 us, considering the redundancy of the cyclic prefix or the guard time in the format, the format 0 corresponds
  • the symbol start time of the PRACH may be the symbol #0 of a normal cyclic prefix subframe, or the start time of the symbol #1, or the symbol #2; or the symbol start time of the PRACH corresponding to the format 0 may be a long loop.
  • Format 4 of the random access preamble sequence occupies about 2 symbols, and is more commonly used in the first uplink partial subframe in an uplink burst.
  • Figure 4b shows a schematic diagram of the mapping of format 0 and format 4 of the random access preamble sequence in a normal cyclic prefix subframe.
  • the time domain location information of the first PRACH resource in the second time period is the location information indicated by the symbol
  • the time domain location information of the first PRACH resource in the second time period implicitly indicates the first PRACH resource. Format information of the random access preamble carried on the uplink.
  • the time domain location information implicitly indicates the random connection carried on the first PRACH resource.
  • the format of the incoming preamble sequence is format 4 or other format that takes up less time resources similar to format 4. If the number of the first symbol in the second period of the first PRACH resource is greater than or equal to 0 and less than 3, the time domain location information implicitly indicates the random access preamble carried on the first PRACH resource.
  • the format of the sequence is format 0 or other format similar to format 0 that occupies approximately 1 ms of time resources.
  • the first PRACH resource indication information includes a configuration index of the first PRACH resource in the second time period, where the time domain location information of the first PRACH resource in the second time period passes the configuration index.
  • the configuration index is further used to indicate a format of a random access preamble sequence carried on the first PRACH resource, a frequency domain location of the first PRACH resource, a zero correlation zone configuration parameter, a root sequence generation parameter, and At least one of the random access radio network temporary identifier RA-RNTI, wherein the root sequence generation parameter is used to generate a root sequence of the random access preamble sequence.
  • the generation parameters of the root sequence are used to generate a root sequence of the random access preamble sequence.
  • a random access preamble sequence may be generated according to the root sequence and the zero correlation zone configuration parameter.
  • the access network device pre-defines a PRACH resource indication table on a carrier of the unlicensed spectrum resource, where the PRACH resource indication table is used to indicate the configuration of the PRACH resource in one or more subframes of the uplink transmission.
  • the PRACH resource indication table includes a PRACH configuration index and a PRACH time domain resource (a relative subframe number in a second time period), and the PRACH resource indication table further includes a sequence format of the random access preamble sequence carried on the PRACH resource. At least one of a frequency domain resource of a PRACH and a Radio Access Radio Network Tempory Identity (RA-RNTI).
  • RA-RNTI Radio Access Radio Network Tempory Identity
  • Table 1 shows one possible form of the PRACH resource indication table (for convenience of description, hereinafter referred to as indication mode 1).
  • PRACH configuration indication Sequence format Relative subframe number PRACH group instructions 0 4 0 Arbitrarily 1 4 1 Arbitrarily 2 4 0,1 Arbitrarily 3 0 1 0 4 0 1 0,1 5 0 1,2 (0;0) 6 0 1,2 (0;1) 7 0 1,2 (1;0) 8 Reserved Reserved Reserved
  • the relative subframe number 0 in Table 1 indicates the first subframe in the second time period.
  • the first subframe may be an uplink partial subframe or an uplink complete subframe.
  • the one PRACH group in Table 1 indicates that the access network device configures one PRACH resource for the cell in one subframe, and the cell may be configured with multiple PRACH groups, wherein the frequency domain of each PRACH resource group The location is pre-configured.
  • the PRACH group indication (x; y) and the relative subframe number jointly indicate the PRACH resource.
  • the PRACH configuration index 6 is taken as an example, and the PRACH resource configuration of the cell is configured as a 0th group of PRACH resources and a subframe with a relative subframe number of 2 in a subframe corresponding to the subframe number 1 in the second time period.
  • the first group of PRACH resources is taken as an example, and the PRACH resource configuration of the cell is configured as a 0th group of PRACH resources and a subframe with a relative subframe number of 2 in a subframe corresponding to the subframe number 1 in the second time period.
  • the PRACH configuration index 8 can be used to indicate that there is no PRACH resource in the second time period.
  • the PRACH is only configured in the first three uplink subframes in one uplink burst, and the channel can be accessed faster.
  • the access network device sends the first indication signaling in the first subframe of the one downlink burst, where the first indication signaling includes the first PRACH resource indication information, and the first PRACH
  • the resource indication information includes a configuration index of the first PRACH resource in the second time period.
  • Table 2 shows another possible form of the PRACH resource indication table (for convenience of description, hereinafter referred to as indication 2).
  • PRACH configuration index Sequence format Relative subframe number PRACH group index 0 4 N-1 Arbitrarily 1 4 n Arbitrarily 2 4 N-1,n Arbitrarily 3 0 n 0 4 0 n 0,1 5 0 N-1,n (0;0) 6 0 N-1,n (0;1) 7 0 N-1,n (1;0) 8 Reserved Reserved Reserved
  • the relative subframe number n in Table 2 represents the last subframe in the second time period.
  • the last subframe in the second time period may be an uplink partial subframe or an uplink complete subframe.
  • the PRACH group indication (x; y) and the relative subframe number jointly indicate the PRACH resource.
  • the PRACH configuration index 6 is taken as an example, and the PRACH resource configuration of the cell is configured as the 0th group PRACH resource on the second last subframe in the second time period and the first group PRACH resource on the last subframe.
  • the PRACH configuration index 8 can be used to indicate that there is no PRACH resource in the second time period.
  • the PRACH is only configured in the last two uplink subframes in one uplink burst. Therefore, the terminal device can have a longer processing time. Therefore, the access network device sends the first indication signaling in the last subframe of the one downlink burst, where the first indication signaling includes the first PRACH resource indication information, and the first PRACH resource indication The information includes a configuration index of the first PRACH resource in the second time period.
  • the access network device determines a frequency domain location in the PRACH that includes the first PRACH resource.
  • the access network device can reduce the dynamic signaling overhead by scheduling the PRACH resource indication table.
  • the first indication signaling includes a first PRACH resource indication information, where the first PRACH resource indication information is used to indicate time domain location information of the first PRACH resource in the second time period, where the first indication signaling is further And including a format of the random access preamble sequence carried on the first PRACH resource, a frequency domain location of the first PRACH resource, a zero correlation zone configuration parameter, a root sequence generation parameter, and a random access wireless network temporary identifier RA- At least one of the RNTIs.
  • the access network device indicates the time domain or the frequency domain location of the first PRACH resource each time, which can increase scheduling flexibility.
  • the terminal device receives the first indication signaling in the first time period.
  • the first indication signaling includes the first PRACH resource indication information
  • the first PRACH resource indication information is used to indicate time domain location information of the first PRACH resource in a second time period
  • the first PRACH resource is configured by a terminal device in a cell served by the access network device for the access network device.
  • the first indication signaling is physical layer signaling.
  • the first time period is a downlink burst.
  • the second time period is an uplink burst.
  • the terminal device receives the first indication signaling on the subframe n in the first time period, where n is an integer greater than or equal to 0.
  • n is an integer greater than or equal to 0.
  • the value of n is 0 to 20.
  • n is an integer greater than or equal to 0 and less than or equal to 9.
  • the offset value of the start subframe in the second time period and the last subframe in the downlink burst where the subframe n is located is a fixed value
  • the offset value of the start subframe and the subframe n in the second time period is a fixed value
  • the starting subframe in the second time period is the first uplink partial subframe after the subframe n+k
  • the uplink partial subframe is a subframe in which at least one symbol is not used for uplink transmission, and k ⁇ 1 ;
  • the starting subframe in the second time period is the first uplink complete subframe after the subframe n+k
  • the uplink complete subframe is an uplink of all uplinks in one subframe.
  • Subframe, k ⁇ 1.
  • the terminal device receives the first indication signaling in the first subframe of the one downlink burst, where the first time period is a downlink burst;
  • the terminal device receives the first indication signaling in a last subframe of the one downlink burst, where the first time period is a downlink burst;
  • the terminal device receives the first indication signaling on the discovery reference signal DRS subframe in the first time period.
  • the time domain location information of the first PRACH resource in the second time period includes at least one of the following situations:
  • the location information of the symbol where the first PRACH resource is located in the second time period is located in the second time period.
  • the time domain location information of the first PRACH resource in the second time period implicitly indicates the format information of the random access preamble sequence carried on the first PRACH resource.
  • the time domain location information implicitly indicates that the first PRACH resource is carried.
  • the format of the random access preamble sequence is format 4 or other format that takes up less time resources similar to format 4. If the number of the first symbol in the second period of the first PRACH resource is greater than or equal to 0 and less than 3, the time domain location information implicitly indicates the random access preamble carried on the first PRACH resource.
  • the format of the sequence is format 0 or other format similar to format 0 that occupies approximately 1 ms of time resources.
  • the terminal device determines, according to the time domain location information, a format corresponding to the random access preamble sequence on the first PRACH resource.
  • the first PRACH resource indication information includes a configuration index of the first PRACH resource in the second time period, where the time domain location information of the first PRACH resource in the second time period passes the configuration index.
  • the configuration index is further used to indicate a format of a random access preamble sequence carried on the first PRACH resource, a frequency domain location of the first PRACH resource, a zero correlation zone configuration parameter, a root sequence generation parameter, and At least one of the random access radio network temporary identifier RA-RNTI, wherein the root sequence generation parameter is used to generate a root sequence of the random access preamble sequence.
  • the configuration index indication can be used to indicate pre-configured parameters in the table.
  • Tables 1 and 2 give two possible forms.
  • the access network device can reduce the dynamic signaling overhead by scheduling the PRACH resource indication table.
  • the first indication signaling includes first PRACH resource indication information, and the first PRACH
  • the resource indication information is used to indicate the time domain location information of the first PRACH resource in the second time period, where the first indication signaling further includes a format of the random access preamble sequence carried on the first PRACH resource, and the At least one of a frequency domain location of a PRACH resource, a zero correlation zone configuration parameter, a root sequence generation parameter, and a random access wireless network temporary identity RA-RNTI.
  • the access network device indicates the time domain or the frequency domain location of the first PRACH resource each time, which can increase scheduling flexibility.
  • the terminal device sends a random access preamble sequence on the first PRACH resource in a second time period.
  • the terminal device selects any candidate random access preamble sequence and sends the first PRACH resource.
  • the candidate random access preamble sequence is a random access preamble sequence available in a cell served by the access network device.
  • the terminal device selects a corresponding random access preamble sequence according to the signaling indication of the access network device, and sends the same on the first PRACH resource.
  • the terminal device selects a random access preamble sequence group from the plurality of random access preamble sequence groups configured by the access network device according to the measured path loss or the size of the data volume to be sent, and the like.
  • a random access preamble sequence is selected in the random access preamble sequence group to be sent on the first PRACH resource.
  • the terminal device determines that the random access preamble sequence is currently transmitted, and then selects a corresponding random access preamble sequence from the access network device configured multiple random access preamble sequence groups. And selecting a random access preamble sequence from the random access preamble sequence group to send on the first PRACH resource.
  • the access network device detects a random access preamble sequence on the first PRACH resource in the second time period.
  • the method for the access network device to detect the random access preamble sequence on the first PRACH resource in the second time period comprises: the access network device randomly selecting the candidate under the cell served by the access network device The preamble sequence correlates with the received signal and determines the peak value. If the peak value exceeds the preset threshold, the access network device determines that the random access preamble sequence corresponding to the peak is a random access preamble sequence sent by the terminal device.
  • the method further includes: the access network device sends a random sequence access response to the terminal device.
  • the sequence identifier of the random access preamble sequence sent by the terminal device is an access network device. It is indicated by signaling.
  • the method for detecting, by the access network device, the random access preamble sequence on the first PRACH resource in the second time period includes: the access network device detects the random access preamble sequence sent to the terminal device and the received signal Determine the peak. If the peak value exceeds the preset threshold, the access network device determines that the random access preamble sequence sent by the terminal device is successfully received.
  • the method further includes: the access network device sends a random sequence access response to the terminal device, to indicate that the terminal device successfully accesses the random access.
  • the access network device sends the indication signaling to the specific network device in the cell according to the scheduling, that is, the first terminal device in the embodiment of the present invention.
  • the second indication signaling in the embodiment of the present invention is used to indicate that the specific terminal device is based on the PRACH resource indicated by the indication signaling sent by the access network device (that is, may be corresponding to the second PRACH sent in the embodiment of the present invention.
  • the method for transmitting the PRACH in the embodiment of the present invention may further include the steps 105 to 108 shown in FIG. 3 .
  • the access network device sends the second indication signaling to the first terminal device.
  • the first terminal device is one of the terminal devices in the cell served by the access network device
  • the second indication signaling is terminal device dedicated signaling
  • the second indication signaling includes the second PRACH resource. Instructing information, wherein the second PRACH resource indication information includes at least one of the following information:
  • the second PRACH resource is different from the first PRACH resource, and the second PRACH resource is used by the first terminal device to perform random access.
  • the first terminal device may correspond to the terminal device #B in FIG. 3.
  • the terminal device is a specific terminal device (ie, the first terminal device) under the cell served by the access network device.
  • the first terminal device receives the second indication signaling sent by the access network device.
  • the first terminal device determines, according to the second indication signaling, information about the second PRACH resource, the sequence identifier of the random access preamble sequence carried on the second PRACH resource, and the format of the random access preamble sequence carried on the second PRACH resource. At least one.
  • the first terminal device sends a random access preamble sequence on the second PRACH resource.
  • the second PRACH resource is different from the first PRACH resource.
  • the first terminal device selects a corresponding random access preamble sequence according to the signaling indication of the access network device, and sends the data on the second PRACH resource.
  • the access network device detects a random access preamble sequence on the second PRACH resource.
  • the access network device performs correlation detection on the random access preamble sequence sent to the first terminal device and the received signal, and determines a peak value. If the peak value exceeds the preset threshold, the access network device determines that the random access preamble sequence sent by the first terminal device is successfully received.
  • the method further includes: the access network device sends a random sequence access response to the first terminal device, to indicate that the terminal device is successfully accessed randomly.
  • the terminal device (ie, the first terminal device corresponding to the embodiment of the present invention) initiates a random access procedure based on the scheduling of the access network device. Therefore, after receiving the second indication signaling, the terminal device determines, according to the second PRACH resource indication information carried in the second indication signaling, the PRACH resource specified by the access network device for performing random access (ie, the corresponding The second PRACH resource in the embodiment of the invention). Next, the terminal device initiates a random access procedure to the access network device on the second PRACH resource.
  • a method of transmitting a PRACH according to an embodiment of the present invention is described in detail above with reference to FIGS. 1 through 4b.
  • An access network device and a terminal device for transmitting a PRACH according to an embodiment of the present invention are described below with reference to FIG. 5 to FIG. 7.
  • FIG. 5 shows a schematic block diagram of an access network device in accordance with an embodiment of the present invention.
  • the access network device 300 includes a sending unit and a processing unit, where
  • the sending unit 310 is configured to send the first indication signaling in the first time period, where the first indication signaling includes a first PRACH resource indication information, where the first PRACH resource indication information is used to indicate the first The time domain location information of the PRACH resource in the second time period, the first PRACH resource is configured for the terminal device in the cell served by the access network device, and the first indication signaling is physical layer signaling
  • the processing unit 320 is configured to detect a random access preamble sequence on the first PRACH resource in the second time period.
  • the sending unit is specifically configured to:
  • the offset value of the initial subframe and the last subframe in the downlink burst where the subframe n is located is a fixed value
  • the offset value of the starting subframe and the subframe n is a fixed value
  • the initial subframe is a first uplink subframe after the subframe n+k, and the uplink subframe is a subframe in which at least one symbol is not used for uplink transmission, k ⁇ 1;
  • the initial subframe is the first uplink complete subframe after the subframe n+k
  • the uplink complete subframe is an uplink subframe in which all symbols in one subframe are used for uplink transmission, and k ⁇ 1.
  • the sending unit sends the first indication signaling in the first time period, including at least one of the following manners:
  • the time domain location information includes at least one of the following information: whether the first PRACH resource exists in the second time period; the first PRACH resource is in The location information of the subframe in the second time period; the location information of the symbol where the first PRACH resource is located in the second time period.
  • the time domain location information implicitly indicates format information of a random access preamble sequence carried on the first PRACH resource.
  • the first PRACH resource indication information includes a configuration index of the first PRACH resource in the second time period, where the time domain location information is indicated by the configuration index.
  • the configuration index is further configured to indicate a format of a random access preamble sequence carried on the first PRACH resource, a frequency domain location of the first PRACH resource, a zero correlation zone configuration parameter, a root sequence generation parameter, and a random connection.
  • the first indication signaling further includes at least one of the following information:
  • a generation parameter of the root sequence used to generate a root sequence of the random access preamble sequence
  • the random access wireless network temporary identity RA-RNTI The random access wireless network temporary identity RA-RNTI.
  • the first PRACH resource includes a first resource block RB and a second RB, where a frequency domain interval between the first RB and the second RB is greater than or equal to a preset. Frequency domain interval.
  • the sending unit is further configured to:
  • the second indication signaling includes a second PRACH resource indication information, where the second PRACH resource indication information includes at least one of the following information:
  • the second PRACH resource is different from the first PRACH resource, and the second PRACH resource is used by the first terminal device to perform random access.
  • An access network device that transmits a PRACH according to an embodiment of the present invention may correspond to an access network device in a method for transmitting a PRACH according to an embodiment of the present invention.
  • the various units included in the access network device and the other operations and/or functions described above are respectively implemented in order to implement the various steps performed by the access network device in FIG. For the sake of brevity, it will not be repeated here.
  • the access network device for transmitting information according to an embodiment of the present invention is described in detail above with reference to FIG.
  • a terminal device according to an embodiment of the present invention will be described below with reference to FIG.
  • FIG. 6 shows a schematic block diagram of a terminal device that transmits a PRACH according to an embodiment of the present invention.
  • the terminal device includes a receiving unit 610 and a sending unit 620, where
  • the receiving unit 410 is configured to receive the first indication signaling in the first time period, where the first indication signaling includes a first PRACH resource indication information, where the first PRACH resource indication information is used to indicate the first The time domain location information of the PRACH resource in the second time period, where the first PRACH resource is configured by the access network device for the terminal device in the cell served by the access network device, where the first indication signaling is Physical layer signaling;
  • the sending unit 420 is configured to send a random access preamble sequence on the first PRACH resource in the second time period.
  • the receiving unit is specifically configured to:
  • n is an integer greater than or equal to 0, wherein the subframe n and a starter in the second time period
  • the frame satisfies at least one of the following conditions:
  • the offset value of the initial subframe and the last subframe in the downlink burst where the subframe n is located is a fixed value
  • the offset value of the starting subframe and the subframe n is a fixed value
  • the initial subframe is a first uplink subframe after the subframe n+k, and the uplink subframe is a subframe in which at least one symbol is not used for uplink transmission, k ⁇ 1;
  • the initial subframe is the first uplink complete subframe after the subframe n+k
  • the uplink complete subframe is an uplink subframe in which all symbols in one subframe are used for uplink transmission, and k ⁇ 1.
  • the receiving unit receives the first indication signaling in the first time period, including at least one of the following manners:
  • the time domain location information includes at least one of the following situations:
  • the time domain location information implicitly indicates format information of a random access preamble sequence carried on the first PRACH resource.
  • the first PRACH resource indication information includes a configuration index of the first PRACH resource in the second time period, where the time domain location information is indicated by the configuration index.
  • the configuration index is further used to indicate that the first PRACH resource carries At least one of a format of a random access preamble sequence, a frequency domain location of the first PRACH resource, a zero correlation zone configuration parameter, a root sequence generation parameter, and a random access radio network temporary identifier RA-RNTI, where The generation parameters of the root sequence are used to generate a root sequence of the random access preamble sequence.
  • the first indication signaling further includes at least one of the following information:
  • a generation parameter of the root sequence used to generate a root sequence of the random access preamble sequence
  • the random access wireless network temporary identity RA-RNTI The random access wireless network temporary identity RA-RNTI.
  • the first PRACH resource includes a first resource block RB and a second RB, where a frequency domain interval between the first RB and the second RB is greater than or equal to a preset. Frequency domain interval.
  • a terminal device may correspond to a terminal device in a method for transmitting a PRACH according to an embodiment of the present invention.
  • the respective units included in the terminal device and the other operations and/or functions described above are respectively for implementing the respective steps performed by the terminal device in FIG. For the sake of brevity, it will not be repeated here.
  • FIG. 7 shows a schematic block diagram of a terminal device according to an embodiment of the present invention.
  • the terminal device includes a receiving unit 510.
  • the receiving unit 510 is configured to receive the first indication signaling in the first time period, where the first indication signaling includes a first PRACH resource indication information, where the first PRACH resource indication information is used to indicate the first The time domain location information of the PRACH resource in the second time period, where the first PRACH resource is configured by the access network device for the terminal device in the cell served by the access network device, where the first indication signaling is Physical layer signaling.
  • the receiving unit is specifically configured to:
  • n is an integer greater than or equal to 0, wherein the subframe n and a starter in the second time period
  • the frame satisfies at least one of the following conditions:
  • the offset value of the start subframe and the last subframe in the downlink burst where the subframe n is located is a fixed value; the offset value of the start subframe and the subframe n is a fixed value. ;
  • the initial subframe is a first uplink subframe after the subframe n+k, and the uplink subframe is a subframe in which at least one symbol is not used for uplink transmission, k ⁇ 1;
  • the initial subframe is the first uplink complete subframe after the subframe n+k
  • the uplink complete subframe is an uplink subframe in which all symbols in one subframe are used for uplink transmission, and k ⁇ 1.
  • the receiving unit receives the first indication signaling in the first time period, including at least one of the following manners:
  • the receiving unit is specifically configured to:
  • the second indication signaling includes a second PRACH resource indication information, where the second PRACH resource indication information includes at least one of the following information: a sequence identifier of a random access preamble carried on the second PRACH resource;
  • the second PRACH resource is different from the first PRACH resource.
  • terminal device further includes:
  • a sending unit configured to send a third random access preamble sequence on the second PRACH resource.
  • the time domain location information includes at least one of the following situations:
  • the time domain location information implicitly indicates format information of a random access preamble sequence carried on the first PRACH resource.
  • the first PRACH resource indication information includes a configuration index of the first PRACH resource in the second time period, where the time domain location information is indicated by the configuration index.
  • the configuration index is further configured to indicate a format of a random access preamble sequence carried on the first PRACH resource, a frequency domain location of the first PRACH resource, a zero correlation zone configuration parameter, a root sequence generation parameter, and a random connection.
  • the first indication signaling further includes at least one of the following information:
  • a generation parameter of the root sequence used to generate a root sequence of the random access preamble sequence
  • the random access wireless network temporary identity RA-RNTI The random access wireless network temporary identity RA-RNTI.
  • the first PRACH resource includes a first resource block RB and a second RB, where a frequency domain interval between the first RB and the second RB is greater than or equal to a preset. Frequency domain interval.
  • a terminal device may correspond to a first terminal device in a method for transmitting a PRACH according to an embodiment of the present invention.
  • the respective units included in the terminal device and the above-described other operations and/or functions respectively implement the respective steps performed by the first terminal device in FIG. For the sake of brevity, it will not be repeated here.
  • the access network device and the terminal device for transmitting the PRACH according to the embodiment of the present invention are described in detail above with reference to FIG. 5 to FIG. 7.
  • An access network device and a terminal device according to an embodiment of the present invention are described below with reference to FIGS. 8 through 10.
  • FIG. 8 shows a schematic structural diagram of an access network device 600 according to an embodiment of the present invention.
  • the access network device 600 includes a processor 610, a transceiver 620, and a memory 630.
  • the device 600 further includes a bus system 640, wherein the processor 610, the transceiver 620, and the memory 630 can be connected by a bus system 640.
  • the memory 630 can be used to store instructions, the processor 610 is configured to execute instructions stored in the memory 630, and the transceiver 620 is configured to,
  • the first indication signaling includes the first PRACH resource indication information, where the first PRACH resource indication information is used to indicate the first The time domain location information of the PRACH resource in the second time period, the first PRACH resource is configured for the terminal device in the cell served by the access network device, and the first indication signaling is physical layer signaling ;
  • the processor 610 is configured to detect a random access preamble sequence on the first PRACH resource in the second time period.
  • the transceiver 620 is specifically configured to:
  • the offset value of the initial subframe and the last subframe in the downlink burst where the subframe n is located is a fixed value
  • the offset value of the starting subframe and the subframe n is a fixed value
  • the initial subframe is a first uplink subframe after the subframe n+k, and the uplink subframe is a subframe in which at least one symbol is not used for uplink transmission, k ⁇ 1;
  • the initial subframe is the first uplink complete subframe after the subframe n+k
  • the uplink complete subframe is an uplink subframe in which all symbols in one subframe are used for uplink transmission, and k ⁇ 1.
  • the transceiver 620 sends the first indication signaling in the first time period, and specifically includes at least one of the following manners:
  • the time domain location information includes at least one of the following information: whether the first PRACH resource exists in the second time period; the first PRACH resource is in The location information of the subframe in the second time period; the location information of the symbol where the first PRACH resource is located in the second time period.
  • the time domain location information implicitly indicates format information of a random access preamble sequence carried on the first PRACH resource.
  • the first PRACH resource indication information includes the a configuration index of the first PRACH resource in the second time period, where the time domain location information is indicated by the configuration index, where the configuration index is further used to indicate a random access preamble carried on the first PRACH resource.
  • the first indication signaling further includes at least one of the following information:
  • a generation parameter of the root sequence used to generate a root sequence of the random access preamble sequence
  • the random access wireless network temporary identity RA-RNTI The random access wireless network temporary identity RA-RNTI.
  • the first PRACH resource includes a first resource block RB and a second RB, where a frequency domain interval between the first RB and the second RB is greater than or equal to a preset. Frequency domain interval.
  • the transceiver 620 is specifically configured to:
  • the second indication signaling includes a second PRACH resource indication information, where the second PRACH resource indication information includes at least one of the following information:
  • the second PRACH resource is different from the first PRACH resource, and the second PRACH resource is used by the first terminal device to perform random access.
  • the processor 610 may be a central processing unit (CPU), and the processor 610 may also be other general-purpose processors, digital signal processors (DSPs), and application specific integrated circuits (ASICs). ), off-the-shelf programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and the like.
  • CPU central processing unit
  • DSP digital signal processors
  • ASICs application specific integrated circuits
  • FPGAs off-the-shelf programmable gate arrays
  • the processor can be a microprocessor or the processor can be any conventional processor or the like.
  • Memory 630 can include read only memory and random access memory and provides instructions and data to processor 610.
  • a portion of processor 610 may also include a non-volatile random access memory.
  • the processor 610 can also store information of the device type.
  • the bus system 640 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 640 in the figure.
  • each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 610 or an instruction in a form of software.
  • the steps of the method for transmitting the PRACH disclosed in the embodiment of the present invention may be directly implemented by the hardware processor, or may be performed by using a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 630, and the processor 610 reads the information in the memory 630 and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • the access network device 600 may correspond to an access network device in a method for transmitting a random access preamble sequence according to an embodiment of the present invention.
  • the various units in device 600 and the other operations and/or functions described above are respectively implemented to implement the various steps performed by the access network device in the figures. For the sake of brevity, it will not be repeated here.
  • FIG. 9 shows a schematic structural diagram of a terminal device 700 according to another embodiment of the present invention.
  • the terminal device 700 includes a processor 710, a transceiver 720, and a memory 730.
  • the device 700 further includes a bus system 740, wherein the processor 710, the transceiver 720, and the memory 730 can be connected by a bus system 740, the memory 730 can be used to store instructions, and the processor 710 is configured to execute the memory 730 storage. instruction,
  • the transceiver 720 is configured to receive the first indication signaling in a first time period, where the first indication signaling includes a first PRACH resource indication information, where the first PRACH resource indication information is used to indicate the first PRACH The time domain location information of the resource in the second time period, where the first PRACH resource is configured by the access network device for the terminal device in the cell served by the access network device, where the first indication signaling is physical Layer signaling
  • a sending unit configured to send a random access preamble sequence on the first PRACH resource in the second time period.
  • the transceiver 720 is specifically configured to:
  • n is an integer greater than or equal to 0, wherein the subframe n and a starter in the second time period
  • the frame satisfies at least one of the following conditions:
  • the offset value of the initial subframe and the last subframe in the downlink burst where the subframe n is located is a fixed value
  • the offset value of the starting subframe and the subframe n is a fixed value
  • the initial subframe is a first uplink subframe after the subframe n+k, and the uplink subframe is a subframe in which at least one symbol is not used for uplink transmission, k ⁇ 1;
  • the initial subframe is the first uplink complete subframe after the subframe n+k
  • the uplink complete subframe is an uplink subframe in which all symbols in one subframe are used for uplink transmission, and k ⁇ 1.
  • the transceiver 720 receives the first indication signaling in the first time period, and specifically includes at least one of the following manners:
  • the time domain location information includes at least one of the following situations:
  • the time domain location information implicitly indicates format information of a random access preamble sequence carried on the first PRACH resource.
  • the first PRACH resource indication information includes a configuration index of the first PRACH resource in the second time period, where the time domain location information is indicated by the configuration index.
  • the configuration index is further configured to indicate a format of a random access preamble sequence carried on the first PRACH resource, a frequency domain location of the first PRACH resource, a zero correlation zone configuration parameter, a root sequence generation parameter, and a random connection.
  • the generation parameter of the root sequence is used to generate a root sequence of the random access preamble sequence.
  • the first indication signaling further includes at least one of the following information:
  • a generation parameter of the root sequence used to generate a root sequence of the random access preamble sequence
  • the random access wireless network temporary identity RA-RNTI The random access wireless network temporary identity RA-RNTI.
  • the first PRACH resource includes a first resource block RB and a second RB, where a frequency domain interval between the first RB and the second RB is greater than or equal to a preset. Frequency domain interval.
  • the processor 710 may be a central processing unit (CPU), and the processor 710 may also be other general-purpose processors, digital signal processors (DSPs), and application specific integrated circuits (ASICs). ), off-the-shelf programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and the like.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • Memory 730 can include read only memory and random access memory and provides instructions and data to processor 710.
  • a portion of the processor 710 can also include a non-volatile random access memory.
  • the processor 710 can also store information of the device type.
  • the bus system 740 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 740 in the figure.
  • each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 710 or an instruction in a form of software.
  • the steps of the method for transmitting a random access preamble sequence disclosed in the embodiments of the present invention may be directly implemented as completion of the hardware processor, or may be performed by using a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in memory 730, and processor 710 reads the information in memory 730 and, in conjunction with its hardware, performs the steps of the above method. To avoid repetition, it will not be described in detail here.
  • a terminal device may correspond to a terminal device in a method for transmitting a PRACH according to an embodiment of the present invention.
  • the respective units included in the terminal device and the other operations and/or functions described above are respectively implemented in order to implement the steps performed by the terminal device in FIG. For the sake of brevity, it will not be repeated here.
  • FIG. 10 is a block diagram showing a schematic structure of a terminal device 800 according to another embodiment of the present invention.
  • device 800 includes a processor 810, a transceiver 820, and a memory 830.
  • the device 1000 further includes a bus system 840, wherein the processor 810, the transceiver 820, and the memory 830 can be connected by a bus system 1040, the memory 830 can be used to store instructions, and the processor 810 is configured to execute the memory 830 storage. instruction,
  • the transceiver 820 is configured to receive the first indication signaling in the first time period, where the first indication signaling includes a first PRACH resource indication information, where the first PRACH resource indication information is used to indicate the first The time domain location information of the PRACH resource in the second time period, where the first PRACH resource is configured by the access network device for the terminal device in the cell served by the access network device, where the first indication signaling is Physical layer signaling.
  • the transceiver 820 is specifically configured to:
  • n is an integer greater than or equal to 0, wherein the subframe n and a starter in the second time period
  • the frame satisfies at least one of the following conditions:
  • the offset value of the start subframe and the last subframe in the downlink burst where the subframe n is located is a fixed value; the offset value of the start subframe and the subframe n is a fixed value. ;
  • the initial subframe is a first uplink subframe after the subframe n+k, and the uplink subframe is a subframe in which at least one symbol is not used for uplink transmission, k ⁇ 1;
  • the initial subframe is the first uplink complete subframe after the subframe n+k
  • the uplink complete subframe is an uplink subframe in which all symbols in one subframe are used for uplink transmission, and k ⁇ 1.
  • the transceiver 820 receives the first indication signaling in the first time period, and specifically includes at least one of the following manners:
  • the transceiver 820 is specifically configured to:
  • the second indication signaling includes a second PRACH resource indication information, where the second PRACH resource indication information includes at least one of the following information: a sequence identifier of a random access preamble carried on the second PRACH resource;
  • the second PRACH resource is different from the first PRACH resource.
  • the transceiver 820 is further configured to send a third random access preamble sequence on the second PRACH resource.
  • the time domain location information includes at least one of the following situations:
  • the time domain location information implicitly indicates format information of a random access preamble sequence carried on the first PRACH resource.
  • the first PRACH resource indication information includes a configuration index of the first PRACH resource in the second time period, where the time domain location information is indicated by the configuration index.
  • the configuration index is further configured to indicate a format of a random access preamble sequence carried on the first PRACH resource, a frequency domain location of the first PRACH resource, a zero correlation zone configuration parameter, a root sequence generation parameter, and a random connection.
  • the first indication signaling further includes at least one of the following information:
  • a generation parameter of the root sequence used to generate a root sequence of the random access preamble sequence
  • the random access wireless network temporary identity RA-RNTI The random access wireless network temporary identity RA-RNTI.
  • the first PRACH resource includes a first resource block RB and a second RB, where a frequency domain interval between the first RB and the second RB is greater than or equal to a preset. Frequency domain interval.
  • the processor 810 may be a central processing unit (CPU), and the processor 810 may also be other general-purpose processors, digital signal processors (DSPs), and application specific integrated circuits (ASICs). ), off-the-shelf programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and the like.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • Memory 830 can include read only memory and random access memory and provides instructions and data to processor 810.
  • a portion of the processor 810 can also include a non-volatile random access memory.
  • the processor 810 can also store information of the device type.
  • the bus system 840 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 840 in the figure.
  • each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 810 or an instruction in a form of software.
  • the steps of the method for transmitting a random access preamble sequence disclosed in the embodiments of the present invention may be directly implemented as completion of the hardware processor, or may be performed by using a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in memory 830, and processor 810 reads the information in memory 830 and, in conjunction with its hardware, performs the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the terminal device may correspond to the first terminal device in the method for transmitting the PRACH according to the embodiment of the present invention. And, the respective units included in the terminal device and the other operations and/or functions described above are respectively implemented in order to implement the steps performed by the first terminal device in FIG. For the sake of brevity, it will not be repeated here.
  • the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be The implementation process of the embodiments of the present invention constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual 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 in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, 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 purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (RAM), a random access memory (ROM), a magnetic disk, or an optical disk.

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

Abstract

L'invention concerne un procédé, un dispositif et un système pour effectuer une transmission sur un PRACH, qui assurent une mise en oeuvre de la transmission sur le PRACH sur une porteuse d'une ressource de spectre de fréquence. Le procédé comprend les étapes suivantes : un dispositif de réseau d'accès envoie une première signalisation d'indication dans une première période, la première signalisation d'indication comprenant des premières informations d'indication de ressource de PRACH, les premières informations d'indication de ressource de PRACH étant utilisées pour indiquer des informations de position de domaine temporel concernant une première ressource de PRACH dans une seconde période, la première ressource de PRACH étant configurée pour des équipements terminaux sous une cellule desservie par le dispositif de réseau d'accès, et la première signalisation d'indication étant une signalisation de couche physique; et le dispositif de réseau d'accès détecte une séquence de préambule d'accès aléatoire sur la première ressource de PRACH dans la seconde période.
PCT/CN2016/078226 2016-03-31 2016-03-31 Procédé, dispositif et système pour effectuer une transmission sur un canal d'accès aléatoire physique (prach) WO2017166255A1 (fr)

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CN201680084047.8A CN108886811B (zh) 2016-03-31 2016-03-31 发送物理随机接入信道prach的方法、设备及系统

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