WO2018121376A1 - Procédé d'accès aléatoire, extrémité d'envoi, et extrémité de réception - Google Patents

Procédé d'accès aléatoire, extrémité d'envoi, et extrémité de réception Download PDF

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Publication number
WO2018121376A1
WO2018121376A1 PCT/CN2017/117466 CN2017117466W WO2018121376A1 WO 2018121376 A1 WO2018121376 A1 WO 2018121376A1 CN 2017117466 W CN2017117466 W CN 2017117466W WO 2018121376 A1 WO2018121376 A1 WO 2018121376A1
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Prior art keywords
sequence
additional information
offset
transmitting end
prach
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PCT/CN2017/117466
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English (en)
Chinese (zh)
Inventor
沈晓冬
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维沃移动通信有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to a random access method, a transmitting end, and a receiving end.
  • the physical random access channel (PRACH) designed by the physical layer of the fourth-generation mobile communication technology in the related art is mainly used for the terminal side to initiate an uplink random access request, so that The base station side further determines the subsequent response according to its request.
  • the main four steps of the random access procedure in the related art are as follows: Step 1: Preamble (ie, PRACH sequence) transmission; Step 2: Random access response; Step 3: Layer 2/Layer 3 message; Step 4: Contention resolution Message.
  • step 1 the sequence generated by the preamble code of the physical layer is mapped to the time-frequency resource of the physical layer, and the LTE currently hosts five formats, wherein the format 4 is equivalent to one of LTE. Symbol length.
  • the ZC (Zaddoff Chu) sequence used by LTE is as follows:
  • N ZC is the sequence length
  • n is the nth sample point of the sequence.
  • the maximum number of PRACH sequences that a UE can use in a cell is 64.
  • the 64 different types of PRACH sequences are generated as follows:
  • SIB System Information Block
  • the cyclic shift interval is also configured by the network side.
  • the order of 64 different PRACHs is as follows.
  • PRACH preamble sequence [0] base sequence
  • PRACH preamble sequence [1] base sequence for 1 ⁇ 26 sample points cyclic shift
  • PRACH preamble sequence [2] base sequence for 2 ⁇ 26 sample points cyclic shift
  • PRACH preamble sequence [31] base sequence for 31 ⁇ 26 sample points cyclic shift
  • PRACH preamble sequence [32] base sequence for 1 sample point cyclic shift
  • PRACH preamble sequence [33] base sequence for 1+1 ⁇ 26 sample points cyclic shift
  • PRACH preamble sequence [34] base sequence for 1 + 2 ⁇ 26 sample points cyclic shift
  • PRACH preamble sequence [63] base sequence for 1 + 31 ⁇ 26 sample points cyclic shift
  • the random access process of the fifth generation mobile communication technology (5G) new air interface (NR) requires carrying as much useful information as possible in the process of transmitting the PRACH sequence by the transmitting end, such as terminal identification.
  • the current PRACH sequence carries limited information and cannot carry more useful information within limited resources.
  • the embodiments of the present disclosure provide a random access method, a transmitting end, and a receiving end, to solve the problem that the information carried by the PRACH sequence is limited and cannot carry more useful information within the limited resources.
  • an embodiment of the present disclosure provides a random access method, which is applied to a sending end, and the method includes:
  • the PRACH sequence includes: a basic sequence carrying identifier information of the transmitting end; and an extended sequence carrying additional information of the transmitting end;
  • an embodiment of the present disclosure further provides a sending end, where the sending end includes:
  • An acquiring module configured to obtain a physical random access channel PRACH sequence, where the PRACH sequence includes: a basic sequence carrying identifier information of the transmitting end; and an extended sequence carrying additional information of the transmitting end;
  • a first sending module configured to send a PRACH sequence to the receiving end
  • the first receiving module is configured to receive a response message sent by the receiving end.
  • an embodiment of the present disclosure further provides a random access method, which is applied to a receiving end, where the method includes:
  • the PRACH sequence includes: a basic sequence carrying the identifier information of the transmitting end; and an extended sequence carrying additional information of the transmitting end;
  • a response message is sent to the sender.
  • an embodiment of the present disclosure further provides a receiving end, where the receiving end includes:
  • a second receiving module configured to receive a physical random access channel PRACH sequence sent by the sending end, where the PRACH sequence includes: a basic sequence carrying the identifier information of the sending end, and an extended sequence carrying additional information of the sending end;
  • the second sending module is configured to send a response message to the sending end according to the PRACH sequence.
  • an embodiment of the present disclosure further provides a transmitting end, including: a memory, a processor, and a computer program stored on the memory and operable on the processor, the processor executing the The steps in the random access method described above are implemented in a computer program.
  • an embodiment of the present disclosure further provides a receiving end, including: a memory, a processor, and a computer program stored on the memory and operable on the processor, the processor executing the The steps in the random access method described above are implemented in a computer program.
  • an embodiment of the present disclosure further provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, where the computer program is executed by a processor to implement the random access method A step of.
  • an embodiment of the present disclosure further provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, where the computer program is executed by a processor to implement the random access method A step of.
  • the basic sequence carrying the identification information of the transmitting end and the PRACH sequence carrying the extended sequence of the additional information of the transmitting end are sent to the receiving end in the random access process, and received by the receiving end.
  • the response message causes the PRACH sequence sent by the sender in the random access procedure to carry more useful information.
  • FIG. 1 is a flowchart of a random access method in some embodiments of the present disclosure
  • 3A is a schematic diagram of generating a PRACH sequence in some embodiments of the present disclosure.
  • 3B is a second schematic diagram of generating a PRACH sequence in some embodiments of the present disclosure.
  • 3C is a third schematic diagram of generating a PRACH sequence in some embodiments of the present disclosure.
  • 3D is a schematic diagram of transmitting a PRACH sequence in some embodiments of the present disclosure.
  • 3E is a second schematic diagram of transmitting a PRACH sequence in some embodiments of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a transmitting end in some embodiments of the present disclosure.
  • FIG. 5 is a second schematic structural diagram of a transmitting end according to some embodiments of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a terminal in some embodiments of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a network device according to some embodiments of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a receiving end in some embodiments of the present disclosure.
  • FIG. 10 is a second schematic structural diagram of a receiving end according to some embodiments of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a network device according to some embodiments of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a terminal in some embodiments of the present disclosure.
  • some embodiments of the present disclosure provide a random access method, which is applied to a transmitting end, and the method includes:
  • Step 101 Obtain a physical random access channel PRACH sequence.
  • the foregoing PRACH sequence includes: a basic sequence carrying identifier information of the sender and an extended sequence carrying additional information of the sender.
  • the additional information of the sending end may include other identifier information of the sending end, beam information of the transmitting end, and the like. It should be noted that the other identifier information in the additional information is different from the identifier information carried in the base sequence, but it can be used to identify the sender.
  • the PRACH sequence including the base sequence and the extended sequence is obtained by means of code superposition. Because the physical layer process of sharing a resource for multiple users such as random access (such as uplink random access), the code domain superposition method can fully utilize the characteristics of the system "soft capacity", and realize carrying more in limited resources. The purpose of useful information.
  • Step 102 Send the PRACH sequence to the receiving end.
  • the transmitting end sends a PRACH sequence including the foregoing basic sequence and the extended sequence to the receiving end, so that the receiving end can respond according to more useful information, that is, the identification information of the transmitting end and the additional information.
  • Step 103 Receive a response message sent by the receiving end.
  • the foregoing response message includes information for indicating whether to agree to the sender access, and the like. It should be noted that the response message may be the same as the random access response in the random access procedure of the 4G LTE, and this is common knowledge to those skilled in the art, and thus will not be described in detail herein.
  • the sending end may be a terminal, such as a smart phone, a tablet computer, or the like, or may be a network device, such as a base station, a core network control node, or the like.
  • the sending end is a terminal
  • the receiving end is a network device
  • the transmitting end is a network device
  • the receiving end is a terminal.
  • the basic sequence carrying the identification information of the transmitting end and the PRACH sequence of the extended sequence carrying the additional information of the transmitting end are received and received.
  • the response message sent by the terminal enables the PRACH sequence sent by the sender in the random access process to carry more useful information.
  • some embodiments of the present disclosure provide a random access method, which is applied to a sending end, and the method includes:
  • Step 201 Generate a base sequence according to the ZC sequence.
  • the foregoing basic sequence carries the identifier information of the sending end, so that the receiving end can distinguish different sending ends according to the basic sequence.
  • the ZC sequence described above Indicates the ZC sequence, u denotes the number of the root sequence, N ZC denotes the sequence length, n denotes the nth sample point of the sequence, j denotes an imaginary unit, and both u and N ZC are configured according to the sequence information previously delivered by the receiving end.
  • sequence information sent by the receiving end refers to various information that is used by the transmitting end to obtain the PRACH sequence, and specifically includes related parameters of the ZC sequence (such as the number of the root sequence, the length of the sequence, etc.), and the basis of the generation.
  • the sequence of the root sequence involved in the sequence and the extended sequence the number of bits of the cyclic shift, the number of subsequences included in the extended sequence, the modulation order of Quadrature Amplitude Modulation (QAM), and the correlation matrix ( For example, a K ⁇ K matrix), a plurality of ZC sequences, a plurality of weight values, and the like.
  • QAM Quadrature Amplitude Modulation
  • the correlation matrix For example, a K ⁇ K matrix
  • a plurality of ZC sequences a plurality of weight values, and the like.
  • a formula can be adopted Generate a base sequence.
  • S 1 represents a base sequence
  • ⁇ represents a first preset weight value.
  • the offset bits of the x u (n) sequence indicating the root sequence numbered u 0 are cyclically shifted, and u 0 and offset are both configured according to the sequence information. Further, ⁇ can also be configured according to the sequence information.
  • Step 202 Generate an extended sequence according to the ZC sequence.
  • the additional information of the sending end of the extended sequence is such that the receiving end can obtain additional information carried by the random access according to the extended sequence, for example, other identification information of the transmitting end and beam information of the transmitting end, so that the receiving end can access the random access. Respond.
  • the extended sequence may be generated by mapping additional information of the transmitting end to at least two ZC sequences; or, by mapping additional information of the transmitting end to one ZC sequence, the extended sequence is generated.
  • Step 203 Superimpose the extended sequence to the base sequence to generate a PRACH sequence.
  • the base sequence and the extended sequence both perform amplitude and phase adjustment by respective weight values in the process of generating the base sequence and the extended sequence, the base sequence and the extended sequence are superimposed (ie, phase The obtained PRACH sequence has better receiving performance.
  • Step 204 Send the PRACH sequence to the receiving end.
  • the PRACH sequence may be transmitted to the receiving end by means of time division multiplexing or frequency division multiplexing.
  • Step 205 Receive a response message sent by the receiving end.
  • the foregoing response message includes information for indicating whether to agree to the sender access, and the like.
  • the sending end may be a terminal, such as a smart phone, a tablet computer, or the like, or may be a network device, such as a base station, a core network control node, or the like.
  • the sending end is a terminal
  • the receiving end is a network device
  • the transmitting end is a network device
  • the receiving end is a terminal.
  • the extended sequence is generated by mapping the additional information of the transmitting end to the at least two ZC sequences, that is, the extended sequence is generated by a bitmap mapping manner, then the additional information by the transmitting end is used.
  • the specific implementation manner of mapping to at least two ZC sequences and generating an extended sequence may be: Generate an extension sequence.
  • S 2 represents a spreading sequence
  • K represents the number of subsequences included in the spreading sequence
  • K N/Q
  • N represents the number of bits of additional information
  • Q represents the modulation order of QAM modulation
  • k represents the number of the subsequence
  • ⁇ k represents the second preset weight value of the kth subsequence
  • An offset k -bit cyclic shift representing a sequence of x u (n) of the root sequence numbered w 0 (k)
  • a 0 (m) represents additional information of the transmitting end carried by the mth sub-sequence
  • W km represents a K ⁇ K matrix
  • K, Q, offset k and W km are all configured according to sequence information, and further, ⁇ k can also be based on The sequence information is configured.
  • a 0 (m) is transformed into B 0 (k) and then modulated onto the ZC sequence.
  • One possible transform may be a Walsh sequence transform, and the main purpose is to make the information bit bearer more robust. Fight against possible interference.
  • the process of generating the foregoing PRACH sequence is as shown in FIG. 3A, where:
  • BLOCK 1 Determine a (u 0 , offset, Nzc), and use the ZC sequence with the identification information of the transmitting end as the basic sequence of the PRACH;
  • BLOCK 4 Modulating each ZC sequence carrying additional information with B 0 (k);
  • BLOCK 5 The individual branches are multiplied by the weight values ⁇ , ⁇ k to adjust.
  • BLOCK 6 Adds two parts of the signal in BLOCK 5 (base sequence and extended sequence).
  • the specific implementation manner of generating the extended sequence by mapping the additional information of the transmitting end to one ZC sequence is two.
  • S 3 represents a spreading sequence
  • y k (n) represents a kth ZC sequence in K ZC sequences
  • y k (n, offset k ) represents an offset k -bit cyclic shift of y k (n)
  • N represents the number of bits of additional information at the transmitting end
  • the K ZC sequences, offset k , and ⁇ k are all configured according to the sequence information.
  • the correspondence between the format of the pre-stored extra information and the number of the ZC sequence can be as shown in Table 2, wherein a 0 , a 1 , a 2 , ... a n in Table 2 respectively represent additional information.
  • the process of generating the foregoing PRACH sequence is as shown in FIG. 3B, where:
  • BLOCK 1 Determine a (u 0 , offset, Nzc), and use the ZC sequence with the identification information of the transmitting end as the basic sequence of the PRACH;
  • BLOCK 2 The additional information carried is mapped to a ZC sequence, numbered k;
  • BLOCK 3 According to the sequence numbered k, the extension sequence is determined to be y k (n, offset k );
  • BLOCK 5 Adds two parts of the signal in BLOCK 4 (base sequence and extended sequence).
  • the second implementation manner of generating the extended sequence is a hybrid manner of the sequence selection mapping and the QAM modulation mapping by mapping the additional information of the transmitting end to a ZC sequence.
  • the method specifically includes the following steps: first, according to the pre-stored additional information.
  • S 4 represents a spreading sequence
  • y k (n) represents the kth ZC sequence in the K ZC sequences
  • y k (n, offset k ) represents an offset k -bit cyclic shift of y k (n)
  • N 1 represents the number of bits of the first partial additional information
  • ⁇ k represents the fourth preset weight value
  • K ZC sequences, offset k , ⁇ k are all configured according to the sequence information. It should be noted that N 1 is smaller than the total number of bits of additional information.
  • j represents the imaginary unit
  • j sqrt(-1)
  • sqrt(*) represents the square root of a number.
  • sequence selection mapping is combined with the QAM modulation mapping, that is, the N 1 bit corresponding to the additional information adopts a sequence selection mapping manner, and the remaining N 2 bits in the additional information are mapped according to the N 2 order QAM.
  • N 2 is the number of bits of the additional information
  • the additional part other than the first additional information is information of the second portion, the signal constellation of modulated symbols corresponding to constellation points in FIG.
  • the process of generating the foregoing PRACH sequence is as shown in FIG. 3C, where:
  • BLOCK 1 Determine a (u 0 , offset, Nzc), and use the ZC sequence with the identification information of the transmitting end as the basic sequence of the PRACH;
  • BLOCK 2 The N 1 bit in the additional information carried is mapped to a ZC sequence, numbered k;
  • BLOCK 3 According to the sequence numbered k, the extension sequence is determined to be y k (n, offset k );
  • BLOCK 4 The remaining N 2 bits in the additional information to be carried generate a constellation symbol s 2 multiplied by s 2 ⁇ y k (n, offset k ) according to the N 2 order QAM mapping;
  • BLOCK 6 Adds two parts of the signal in BLOCK 5 (base sequence and extended sequence).
  • the foregoing step 204 includes three specific implementation manners.
  • the first specific implementation manner is: directly transmitting a PRACH sequence generated after the extension sequence is superimposed to the base sequence.
  • the second specific implementation manner is a time division multiplexing manner, where the method specifically includes the following steps: sending a basic sequence at a first preset time; and transmitting an extended sequence at a second preset time. That is, the basic sequence and the extended sequence are transmitted in different time slots.
  • the third specific implementation manner is frequency division multiplexing.
  • the method is specifically: sending a basic sequence in a first preset frequency domain subband, and simultaneously transmitting an extended sequence in a second preset time. That is, the base sequence and the extended sequence are at the same time, but are transmitted in different frequency domain subbands.
  • the manner of generating the PRACH sequence in FIG. 3C is taken as an example to further explain the manner of transmitting the PRACH sequence.
  • the process of transmitting the base sequence and the extended sequence is as shown in FIG. 3D.
  • the base sequence and the extended sequence are transmitted by frequency division multiplexing, the base sequence and the extension are transmitted.
  • the sequence of the process is shown in Figure 3E.
  • the abscissa in the simple coordinates in FIGS. 3D and 3E represents time, and the ordinate represents frequency.
  • the base sequence carrying the identifier information of the sender and the extension sequence carrying the additional information of the sender are generated according to the ZC sequence, and the extension sequence is superimposed to the base sequence to generate the PRACH sequence, so that The PRACH sequence sent to the receiving end during the random access process can carry more useful information within the limited resources.
  • some embodiments of the present disclosure provide a transmitting end, where the sending end 400 includes:
  • the obtaining module 401 is configured to obtain a physical random access channel PRACH sequence, where the PRACH sequence includes: a basic sequence carrying identifier information of the transmitting end; and an extended sequence carrying additional information of the transmitting end;
  • the first sending module 402 is configured to send the PRACH sequence to the receiving end;
  • the first receiving module 403 is configured to receive a response message sent by the receiving end.
  • the sending end 400 may be a terminal, such as a smart phone or a tablet computer, or may be a network device, such as a base station, a core network control node, or the like.
  • a terminal such as a smart phone or a tablet computer
  • a network device such as a base station, a core network control node, or the like.
  • the sending end is a terminal
  • the receiving end is a network device
  • the transmitting end is a network device
  • the receiving end is a terminal.
  • the obtaining module 401 includes:
  • a first generating submodule 4011 configured to generate a base sequence according to the ZC sequence
  • a second generation submodule 4012 configured to generate an extended sequence according to the ZC sequence
  • the superposition sub-module 4013 is configured to superimpose the extended sequence to the base sequence to generate a PRACH sequence.
  • ZC sequence x u (n) represents the ZC sequence
  • u represents the number of the root sequence
  • N ZC represents the sequence length
  • n represents the nth sample point of the sequence
  • j represents the imaginary unit
  • both u and N ZC are pre-issued according to the receiving end.
  • the sequence information is configured.
  • the first generating submodule 4011 is specifically configured to pass the formula Generating a base sequence
  • S 1 represents a base sequence
  • ⁇ represents a first preset weight value.
  • the offset bits representing the x u (n) sequence of the root sequence numbered u 0 are cyclically shifted, and u 0 and offset are both configured according to the sequence information.
  • the second generating submodule 4012 includes:
  • a first generating unit 40121 configured to generate a spreading sequence by mapping additional information of the transmitting end to at least two ZC sequences;
  • the second generating unit 40122 is configured to generate an extended sequence by mapping additional information of the transmitting end to a ZC sequence.
  • the first generating unit 40121 is specifically configured to adopt a formula Generating an extended sequence
  • S 2 represents a spreading sequence
  • K represents the number of subsequences included in the spreading sequence
  • K N/Q
  • N represents the number of bits of additional information
  • Q represents the modulation order of QAM modulation
  • k represents the number of the subsequence
  • ⁇ k represents the second preset weight value of the kth subsequence
  • An offset k -bit cyclic shift representing a sequence of x u (n) of the root sequence numbered w 0 (k)
  • a 0 (m) represents additional information of the transmitting end carried by the mth subsequence
  • W km represents a K ⁇ K matrix
  • K, Q, offset k and W km are all configured according to the sequence information.
  • the second generating unit 40122 includes:
  • a first determining subunit 401221 configured to determine, according to a correspondence between a format of the pre-stored additional information and a number of the ZC sequence, a number k of the ZC sequence corresponding to the format of the additional information of the transmitting end;
  • S 3 represents a spreading sequence
  • y k (n) represents a kth ZC sequence in K ZC sequences
  • y k (n, offset k ) represents an offset k -bit cyclic shift of y k (n)
  • the second generating unit 40122 includes:
  • a second determining subunit 401223, configured to determine, according to a correspondence between a format of the pre-stored additional information and a number of the ZC sequence, a number k of the ZC sequence corresponding to the format of the first part of the additional information of the additional information of the transmitting end;
  • a third determining subunit 401224 configured to determine, according to a correspondence between a format of the pre-stored additional information and a constellation symbol, a constellation symbol s 2 corresponding to a format of the second partial additional information except the first partial additional information in the additional information of the transmitting end ;
  • S 4 represents a spreading sequence
  • y k (n) represents the kth ZC sequence in the K ZC sequences
  • y k (n, offset k ) represents an offset k -bit cyclic shift of y k (n)
  • N 1 represents the number of bits of the first partial additional information
  • ⁇ k represents the fourth preset weight value
  • K ZC sequences, offset k , ⁇ k are all configured according to the sequence information.
  • the first sending module 402 includes:
  • the first sending submodule 4021 is configured to send a basic sequence at a first preset time
  • the second sending submodule 4022 is configured to send the extended sequence at the second preset time.
  • the first sending module 402 is configured to send the basic sequence in the first preset frequency domain subband, and simultaneously send the extended sequence in the second preset time.
  • the transmitting end sends the basic sequence carrying the identification information of the transmitting end and the PRACH sequence of the extended sequence carrying the additional information of the transmitting end, and is sent to the receiving end by transmitting to the receiving end in the random access process.
  • the response message causes the PRACH sequence sent by the sender during the random access procedure to carry more useful information.
  • the sending end is a terminal, in order to better achieve the above purpose, as shown in FIG. 6, some embodiments of the present disclosure provide a terminal, where the terminal 600 includes: at least one processor 601, a memory 602, and at least one network interface. 604 and user interface 603.
  • the various components in terminal 600 are coupled together by a bus system 605.
  • the bus system 605 is used to implement connection communication between these components.
  • the bus system 605 includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • various buses are labeled as bus system 605 in FIG.
  • the user interface 603 may include a display, a keyboard, or a pointing device (eg, a mouse, a trackball, a touchpad, or a touch screen, etc.).
  • a pointing device eg, a mouse, a trackball, a touchpad, or a touch screen, etc.
  • the memory 602 in an embodiment of the present disclosure may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), or an electric Erase programmable read only memory (EEPROM) or flash memory.
  • the volatile memory can be a Random Access Memory (RAM) that acts as an external cache.
  • RAM Random Access Memory
  • many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (Synchronous DRAM).
  • SDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • DDRSDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • ESDRAM Enhanced Synchronous Dynamic Random Access Memory
  • SDRAM Synchronous Connection Dynamic Random Access Memory
  • DRRAM direct memory bus random access memory
  • memory 602 stores elements, executable modules or data structures, or a subset thereof, or their set of extensions: operating system 6021 and application 6022.
  • the operating system 6021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, for implementing various basic services and processing hardware-based tasks.
  • the application 6022 includes various applications, such as a media player (Media Player), a browser, and the like, for implementing various application services. Programs that implement the methods of some embodiments of the present disclosure may be included in the application 6022.
  • the processor 601 is configured to acquire a physical random access channel PRACH sequence; wherein, the PRACH The sequence includes: a basic sequence carrying the identifier information of the sender and an extended sequence carrying the additional information of the sender; sending the PRACH sequence to the receiver; and receiving the response message sent by the receiver.
  • Processor 601 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 601 or an instruction in a form of software.
  • the processor 601 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), or the like. Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA Field Programmable Gate Array
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in connection with some embodiments of the present disclosure may be directly embodied by the hardware decoding processor, or by a combination of hardware and software modules in the decoding 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 602, and the processor 601 reads the information in the memory 602 and completes the steps of the above method in combination with its hardware.
  • the embodiments described herein can be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof.
  • the processing unit can be implemented in one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processing (DSP), Digital Signal Processing Equipment (DSP Device, DSPD), programmable Programmable Logic Device (PLD), Field-Programmable Gate Array (FPGA), general purpose processor, controller, microcontroller, microprocessor, other for performing the functions described herein In an electronic unit or a combination thereof.
  • ASICs Application Specific Integrated Circuits
  • DSP Digital Signal Processing
  • DSP Device Digital Signal Processing Equipment
  • PLD programmable Programmable Logic Device
  • FPGA Field-Programmable Gate Array
  • the techniques described herein can be implemented by modules (eg, procedures, functions, and so on) that perform the functions described herein.
  • the software code can be stored in memory and executed by the processor.
  • the memory can be implemented in the processor or external to the processor.
  • the processor 601 is further configured to: generate a base sequence according to the ZC sequence; generate a spread sequence according to the ZC sequence; and superimpose the extended sequence to the base sequence to generate a PRACH sequence.
  • the ZC sequence x u (n) represents the ZC sequence
  • u represents the number of the root sequence
  • N ZC represents the sequence length
  • n represents the nth sample point of the sequence
  • j represents the imaginary unit
  • both u and N ZC are pre-issued according to the receiving end.
  • the sequence information is configured.
  • the processor 601 is further configured to: pass a formula Generating a base sequence; wherein S 1 represents a base sequence and ⁇ represents a first preset weight value, The offset bits representing the x u (n) sequence of the root sequence numbered u 0 are cyclically shifted, and u 0 and offset are both configured according to the sequence information.
  • the processor 601 is further configured to: generate an extended sequence by mapping additional information of the transmitting end to at least two ZC sequences; or generate an extended sequence by mapping additional information of the transmitting end to one ZC sequence.
  • the processor 601 is further configured to: send the basic sequence at the first preset time; and send the extended sequence at the second preset time.
  • the processor 601 is further configured to: send the basic sequence in the first preset frequency domain subband, and simultaneously send the extended sequence in the second preset time.
  • the terminal 600 can implement various processes implemented by the sender in some embodiments of the present disclosure. To avoid repetition, details are not described herein again.
  • the terminal sends the basic sequence carrying the identification information of the transmitting end and the PRACH sequence of the extended sequence carrying the additional information of the transmitting end to the receiving end, and receives the PRACH sequence of the extended sequence carrying the additional information of the transmitting end.
  • the response message causes the PRACH sequence sent by the sender in the random access procedure to carry more useful information.
  • some embodiments of the present disclosure provide a network device, where the network device includes: a processor 700; and the processing through the bus interface a memory 720 coupled to the processor 700, and a transceiver 710 coupled to the processor 700 via a bus interface; the memory 720 for storing programs and data used by the processor in performing operations; The 710 sends the data information or the pilot, and the uplink control channel is also received by the transceiver 710.
  • the processor 700 invokes and executes the program and data stored in the memory 720, the method is specifically used to obtain the physical random access channel PRACH sequence.
  • the PRACH sequence includes: a base sequence carrying the identifier information of the sender and an extended sequence carrying the additional information of the sender; sending the PRACH sequence to the receiver; and receiving the response message sent by the receiver.
  • the processor 700 is further configured to: generate a base sequence according to the ZC sequence; generate a spread sequence according to the ZC sequence; and superimpose the extended sequence to the base sequence to generate a PRACH sequence.
  • the ZC sequence x u (n) represents the ZC sequence
  • u represents the number of the root sequence
  • N ZC represents the sequence length
  • n represents the nth sample point of the sequence
  • j represents the imaginary unit
  • both u and N ZC are pre-issued according to the receiving end.
  • the sequence information is configured.
  • the processor 700 is further configured to: pass a formula Generating a base sequence; wherein S 1 represents a base sequence and ⁇ represents a first preset weight value, The offset bits representing the x u (n) sequence of the root sequence numbered u 0 are cyclically shifted, and u 0 and offset are both configured according to the sequence information.
  • the processor 700 is further configured to: generate an extended sequence by mapping additional information of the transmitting end to at least two ZC sequences; or generate an extended sequence by mapping additional information of the transmitting end to one ZC sequence.
  • the processor 700 is further configured to: send the basic sequence at the first preset time; and send the extended sequence at the second preset time.
  • the processor 700 is further configured to: send the basic sequence in the first preset frequency domain subband, and simultaneously send the extended sequence in the second preset time.
  • the transceiver 710 is configured to receive and transmit data under the control of the processor 700.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 700 and various circuits of memory represented by memory 720.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 710 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 can store data used by the processor 700 in performing operations.
  • the network device sends the basic sequence of the identification information of the transmitting end and the PRACH sequence of the extended sequence carrying the additional information of the transmitting end, and receives the response message sent by the receiving end, so that the transmitting end is sent to the receiving end.
  • the PRACH sequence transmitted during the random access procedure carries more useful information.
  • some embodiments of the present disclosure provide a random access method, which is applied to a receiving end, and the method includes:
  • Step 801 Receive a physical random access channel PRACH sequence sent by the sending end.
  • the foregoing PRACH sequence includes: a basic sequence carrying identifier information of the transmitting end, and a spreading sequence carrying additional information of the transmitting end, where the additional information of the transmitting end may include other identifier information of the transmitting end and beam information of the transmitting end, etc., so that the receiving end is When the PRACH sequence is received, more useful information related to the sender can be obtained, so as to facilitate subsequent response to the PRACH sequence. It should be noted that the other identifier information in the additional information is different from the identifier information carried in the base sequence, but it can be used to identify the sender.
  • the receiving end may be a terminal, such as a smart phone, a tablet computer, or the like, or may be a network device, such as a base station, a core network control node, or the like.
  • the transmitting end is a network device; and if the receiving end is a network device, then the transmitting end is a terminal.
  • Step 802 Send a response message to the sending end according to the PRACH sequence.
  • the foregoing response message includes information for indicating whether to agree to the sender access, and the like. It should be noted that the response message may be the same as the random access response in the random access procedure of the 4G LTE, and this is common knowledge to those skilled in the art, and thus will not be described in detail herein.
  • the first specific implementation manner is: directly receiving a PRACH sequence in which the extended sequence and the base sequence are superposed.
  • the second specific implementation manner is a time division multiplexing manner, where the method specifically includes the following steps: first, receiving a basic sequence at a first preset time; then performing channel estimation according to the basic sequence to obtain a channel estimation result; The channel estimation result receives the extended sequence at the second preset time.
  • the first preset time and the second preset time are pre-negotiated between the receiving end and the sending end.
  • the third specific implementation manner is frequency division multiplexing.
  • the method includes the following steps: first, receiving a basic sequence in a first preset frequency domain subband; and then performing channel estimation according to the basic sequence to obtain a channel estimation result; And according to the obtained channel estimation result, the extended sequence is received in the second preset frequency domain subband.
  • the first preset frequency domain subband and the second preset frequency domain subband are pre-negotiated between the receiving end and the sending end.
  • the base end sequence including the identifier information carrying the sender and the PRACH sequence of the extended sequence carrying the additional information of the sender are received, and the response message is sent to the sender according to the PRACH sequence, so that the sender Successfully implementing the PRACH sequence transmitted during the random access process carries more useful information.
  • some embodiments of the present disclosure provide a receiving end, where the receiving end 900 includes:
  • the second receiving module 901 is configured to receive a physical random access channel PRACH sequence sent by the sending end, where the PRACH sequence includes: a basic sequence carrying the identifier information of the sending end, and an extended sequence carrying the additional information of the sending end;
  • the second sending module 902 is configured to send a response message to the sending end according to the PRACH sequence.
  • the receiving end 900 may be a terminal, such as a smart phone, a tablet computer, or the like, or may be a network device, such as a base station, a core network control node, or the like.
  • a terminal such as a smart phone, a tablet computer, or the like
  • a network device such as a base station, a core network control node, or the like.
  • the transmitting end is a network device; and if the receiving end is a network device, then the transmitting end is a terminal.
  • the second receiving module 901 includes:
  • the first receiving submodule 9011 is configured to receive the basic sequence at the first preset time
  • a first estimation sub-module 9012 configured to perform channel estimation according to the basic sequence, to obtain a channel estimation result
  • the second receiving sub-module 9013 is configured to receive the extended sequence at the second preset time according to the obtained channel estimation result.
  • the second receiving module 901 includes:
  • the third receiving submodule 9014 is configured to receive the basic sequence in the first preset frequency domain subband
  • a second estimation sub-module 9015 configured to perform channel estimation according to the basic sequence, to obtain a channel estimation result
  • the fourth receiving submodule 9016 is configured to receive the extended sequence in the second preset frequency domain subband according to the obtained channel estimation result.
  • the receiving end receives the PRACH sequence including the basic sequence carrying the identification information of the transmitting end and the extended sequence carrying the additional information of the transmitting end, and sends a response message to the transmitting end according to the PRACH sequence, so that the transmitting end Successfully implementing the PRACH sequence transmitted during the random access process carries more useful information.
  • the receiving end is a network device, in order to better achieve the above purpose, as shown in FIG. 11 , some embodiments of the present disclosure provide a network device, where the network device 1100 includes: a processor 1101, a transceiver 1102, and a memory 1103. , user interface 1104 and bus interface, wherein:
  • the processor 1101 is configured to read a program in the memory 1103 and perform the following process:
  • the PRACH sequence includes: a basic sequence carrying the identifier information of the transmitting end and an extended sequence carrying the additional information of the transmitting end; and sending a response message to the transmitting end according to the PRACH sequence.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1101 and various circuits of memory represented by memory 1103.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • the transceiver 1102 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 1104 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 1101 is responsible for managing the bus architecture and general processing, and the memory 1103 can store data used by the processor 1101 when performing operations.
  • the processor 1101 is further configured to: receive a basic sequence at a first preset time; perform channel estimation according to the basic sequence, obtain a channel estimation result; and receive the extended sequence at the second preset time according to the obtained channel estimation result.
  • the processor 1101 is further configured to: receive a basic sequence in the first preset frequency domain subband; perform channel estimation according to the basic sequence, obtain a channel estimation result; and obtain a second preset frequency according to the obtained channel estimation result.
  • the domain subband receives the extended sequence.
  • the network device of some embodiments of the present disclosure by receiving a basic sequence including the identification information of the transmitting end and a PRACH sequence of the extended sequence carrying the additional information of the transmitting end, and sending a response message to the transmitting end according to the PRACH sequence, so that the transmitting end succeeds in realizing
  • the PRACH sequence sent during the random access process carries more useful information.
  • a terminal which may be a mobile phone, a tablet computer, or a personal digital assistant (Personal Digital Assistant, PDA), or car computer, etc.
  • PDA Personal Digital Assistant
  • the terminal 1200 in FIG. 12 includes a radio frequency (RF) circuit 1210, a memory 1220, an input unit 1230, a display unit 1240, a processor 1260, an audio circuit 1270, a WiFi (Wireless Fidelity) module 1280, and a power supply 1290.
  • RF radio frequency
  • the input unit 1230 can be configured to receive numeric or character information input by the user, and generate signal input related to user setting and function control of the terminal 1200.
  • the input unit 1230 may include a touch panel 1231.
  • the touch panel 1231 also referred to as a touch screen, can collect touch operations on or near the user (such as the operation of the user using any suitable object or accessory such as a finger or a stylus on the touch panel 1231), and according to the preset The programmed program drives the corresponding connection device.
  • the touch panel 1231 may include two parts: a touch detection device and a touch controller.
  • the touch detection device detects the touch orientation of the user, and detects a signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts the touch information into contact coordinates, and sends the touch information.
  • the processor 1260 is provided and can receive commands from the processor 1260 and execute them.
  • the touch panel 1231 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves.
  • the input unit 1230 may further include other input devices 1232.
  • the other input devices 1232 may include, but are not limited to, a physical keyboard, function keys (such as a volume control button, a switch button, etc.), a trackball, a mouse, a joystick, and the like. One or more of them.
  • the display unit 1240 can be used to display information input by the user or information provided to the user and various menu interfaces of the terminal 1200.
  • the display unit 1240 can include a display panel 1241.
  • the display panel 1241 can be configured in the form of an LCD or an Organic Light-Emitting Diode (OLED).
  • the touch panel 1231 may cover the display panel 1241 to form a touch display screen, and when the touch display screen detects a touch operation on or near it, it is transmitted to the processor 1260 to determine the type of the touch event, and then the processor The 1260 provides a corresponding visual output on the touch display depending on the type of touch event.
  • the touch display includes an application interface display area and a common control display area.
  • the arrangement manner of the application interface display area and the display area of the common control is not limited, and the arrangement manner of the two display areas can be distinguished by up-and-down arrangement, left-right arrangement, and the like.
  • the application interface display area can be used to display the interface of the application. Each interface can contain interface elements such as at least one application's icon and/or widget desktop control.
  • the application interface display area can also be an empty interface that does not contain any content.
  • the common control display area is used to display controls with high usage, such as setting buttons, interface numbers, scroll bars, phone book icons, and the like.
  • the processor 1260 is a control center of the terminal 1200, and connects various parts of the entire mobile phone by using various interfaces and lines, by running or executing software programs and/or modules stored in the first memory 1221, and calling the second memory.
  • the data in 1222 performs various functions and processing data of the terminal 1200, thereby performing overall monitoring on the terminal 1200.
  • the processor 1260 can include one or more processing units.
  • the processor 1260 is configured to receive physical random access sent by the sender by calling a software program and/or module stored in the first memory 1221 and/or data in the second memory 1222.
  • a channel PRACH sequence where the PRACH sequence includes: a base sequence carrying identifier information of the sender and an extension sequence carrying additional information of the sender; and transmitting a response message to the sender according to the PRACH sequence.
  • the processor 1260 is further configured to: receive the basic sequence at the first preset time; perform channel estimation according to the basic sequence, obtain a channel estimation result; and receive the extended sequence at the second preset time according to the obtained channel estimation result.
  • the processor 1260 is further configured to: receive a basic sequence in the first preset frequency domain subband; perform channel estimation according to the basic sequence, obtain a channel estimation result; and obtain a second preset frequency according to the obtained channel estimation result.
  • the domain subband receives the extended sequence.
  • the terminal receives the PRACH sequence including the base sequence carrying the identifier information of the sender and the extended sequence carrying the additional information of the sender, and sends a response message to the sender according to the PRACH sequence, so that the terminal sends the response message to the sender.
  • the terminal successfully implements the PRACH sequence transmitted during the random access procedure to carry more useful information.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner 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 various embodiments of the present disclosure 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. Based on such understanding, a portion of the technical solution of the present disclosure that contributes in essence or to the related art or a part of the technical solution may be embodied in the form of a software product stored in a storage medium, including several The instructions are for causing 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 disclosure.
  • the foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, 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

Des modes de réalisation de la présente invention concernent un procédé d'accès aléatoire, une extrémité d'envoi, et une extrémité de réception. Le procédé consiste à : obtenir une séquence de canal d'accès aléatoire physique (PRACH), la séquence de PRACH comprenant une séquence de base contenant des informations d'identification d'une extrémité d'envoi et une séquence étendue contenant des informations supplémentaires de l'extrémité d'envoi ; envoyer la séquence de PRACH à une extrémité de réception ; et recevoir un message de réponse envoyé par l'extrémité de réception.
PCT/CN2017/117466 2016-12-30 2017-12-20 Procédé d'accès aléatoire, extrémité d'envoi, et extrémité de réception WO2018121376A1 (fr)

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