WO2018019071A1 - 前导序列的配置方法、用户设备及接入网设备 - Google Patents

前导序列的配置方法、用户设备及接入网设备 Download PDF

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Publication number
WO2018019071A1
WO2018019071A1 PCT/CN2017/090323 CN2017090323W WO2018019071A1 WO 2018019071 A1 WO2018019071 A1 WO 2018019071A1 CN 2017090323 W CN2017090323 W CN 2017090323W WO 2018019071 A1 WO2018019071 A1 WO 2018019071A1
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Prior art keywords
preamble sequence
information
access network
network device
user equipment
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PCT/CN2017/090323
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English (en)
French (fr)
Inventor
王桂杰
王坚
林美新
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华为技术有限公司
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Priority to EP17833374.6A priority Critical patent/EP3481094B1/en
Publication of WO2018019071A1 publication Critical patent/WO2018019071A1/zh
Priority to US16/258,097 priority patent/US10873974B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0215—Traffic management, e.g. flow control or congestion control based on user or device properties, e.g. MTC-capable devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0061—Error detection codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0466—Wireless resource allocation based on the type of the allocated resource the resource being a scrambling code
    • 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
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/022—Selective call receivers
    • H04W88/023—Selective call receivers with message or information receiving capability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0016—Time-frequency-code

Definitions

  • the embodiments of the present invention relate to the field of communications technologies, and in particular, to a method for configuring a preamble sequence, a user equipment, and an access network device.
  • an access resource refers to a user equipment (UE) randomly selecting a preamble (Preamble) during an access procedure before starting communication with the network. Since the UE randomly selects the preamble sequence, there is a possibility that multiple UEs simultaneously transmit the same preamble sequence, which may result in random access (RA) collision.
  • UE user equipment
  • Preamble preamble
  • the contention-based RA process is as shown in FIG. 1.
  • the UE sends Msg1 to the access network device on the physical random access channel (PRACH) designated by the communication network system, and Msg1 is used as the preamble sequence of the RA.
  • PRACH physical random access channel
  • Msg1 is used as the preamble sequence of the RA.
  • Step 2 The access network device sends Msg2 according to the received detection result of the preamble sequence, and Msg2 is a random access response (RAR); in step 3, the UE without RA conflicts accesses the access network device.
  • RAR random access response
  • the exact Msg3 is transmitted, the Msg3 is the RA process message, for example, the tracking area update or the scheduling request, etc.); in the fourth step, the access network device resolves the competition between the multiple UEs, and feeds back the Msg4 to the UE.
  • the preamble sequence can distinguish different UEs on the same PRACH time-frequency resource. If more than one UE transmits the same preamble sequence on the same PRACH time-frequency resource, a random access collision occurs, resulting in random access failure.
  • the application provides a configuration method of a preamble sequence, a user equipment, and an access network device, so that the user equipment can randomly access the communication network system, thereby reducing the probability of random access failure.
  • a first aspect of the present application provides a method for configuring a preamble sequence, including:
  • the access network device determines preamble sequence information, the preamble sequence information including a message indicating a quantity of the preamble sequence;
  • the access network device sends the preamble sequence information to the user equipment, where the preamble sequence information is used for random access by the user equipment.
  • the user equipment needs to select among the specified number of preamble sequences of the access network equipment.
  • a preamble sequence is selected and sent to the access network device.
  • the access network device determines the preamble sequence information according to the preamble sequence space configuration parameter, where the preamble sequence information includes a message indicating the number of preamble sequences, and the preamble sequence information is sent.
  • the user equipment is enabled to enable the user equipment to perform random access according to the preamble sequence information, so that the user equipment can smoothly access the communication network system smoothly, thereby reducing the probability of random access failure.
  • the preamble sequence information further includes spatial level information, where the spatial level information is used to indicate a code domain space layer of the preamble sequence space.
  • the optional preamble sequence space has a multi-layer code domain space on the code domain, and therefore, the preamble sequence information determined by the access network device is included in addition to In addition to the message indicating the number of preamble sequences, spatial level information for indicating the number of code domain spatial layers of the preamble sequence space is also included.
  • the access network device sends the preamble sequence information to the user equipment, including:
  • the access network device generates a CRC code according to the spatial level information
  • the access network device performs verification processing on the MIB according to the CRC code
  • the access network device sends the MIB after the verification process through the PBCH.
  • the system information is divided into a main information block (MIB) and a plurality of SIBs, and a cyclic redundancy school is generated according to the spatial level information.
  • the (Cyclic Redundancy Check, CRC) code is used to check the MIB.
  • CRC Cyclic Redundancy Check
  • the access network device generates a CRC code according to the spatial level information, including:
  • the access network device determines a corresponding CRC design rule according to the spatial level information, and generates a CRC code according to the CRC design rule, where the correspondence between the spatial level information and the CRC design rule is the
  • the network access device and the user equipment are well known.
  • the communication system presets the correspondence between the spatial level information well known by the user equipment and the access network device and the CRC design rule, so that when the spatial level information is different, different CRC design rules are selected.
  • the CRC code is generated, and when the user equipment obtains the MIB by blind detection, the CRC design rule can be determined according to the removed CRC code, thereby accurately obtaining the spatial level information corresponding to the CRC design rule.
  • the access network device sends the preamble sequence information to the user equipment, including:
  • the access network device generates a scrambling code sequence according to the spatial level information
  • the access network device performs scrambling processing on the MIB according to the scrambling code sequence
  • the access network device sends the scrambled MIB through the PBCH.
  • the scrambling code sequence is generated according to the spatial level information, and the MIB is scrambled according to the scrambling code sequence, and when the user equipment obtains the MIB by blindly checking the PBCH, the decoding sequence can be accurately determined according to the used decoding sequence.
  • the process of descrambling code processing can realize the transmission of spatial level information and reduce the signaling overhead.
  • the access network device generates a scrambling code sequence according to the spatial level information, including:
  • Determining, by the access network device, a corresponding descrambling code design rule according to the spatial level information, and generating a scrambling code sequence according to the descrambling code design rule, the spatial level information and the descrambling code design rule The corresponding relationship is known to the access network device and the user equipment.
  • the communication system presets the correspondence between the spatial level information shared by the user equipment and the access network device and the descrambling code design rule, so that when the spatial level information is different, different solutions are selected.
  • the scrambling code design rule generates a scrambling code sequence to scramble the MIB.
  • the user equipment obtains the MIB by blind detection, the user can determine the descrambling code design rule according to the decoding sequence used, so as to accurately obtain the corresponding descrambling code design rule. Spatial level information.
  • the access network device sends the preamble sequence information to the user equipment, including:
  • the access network device carries the spatial level information in the preamble sequence information in an SIB;
  • the access network device sends the SIB through a PDSCH.
  • the system information is divided into the MIB and the multiple SIBs in the system message sent by the access network device to the user equipment.
  • the SIB is divided into multiple types, and the general time-frequency resource information is indicated by the field in the SIB2. Therefore, the spatial level information in the preamble sequence information can also be indicated by the field in the SIB2, so that the SIB2 carries the spatial level information, and the SIB2 is sent to the user equipment through the PDSCH, so that the user equipment can receive the SIB2. After that, the spatial level information is obtained by parsing the fields in SIB2.
  • the preamble sequence information further includes time-frequency resource information, where the time-frequency resource information is used to indicate a time-frequency resource occupied by the preamble sequence space in the PRACH.
  • the access network device sends the preamble sequence information to the user equipment, and further includes:
  • the access network device carries the time-frequency resource information in the preamble sequence information in an SIB;
  • the access network device sends the SIB through a PDSCH.
  • the system information is divided into MIBs and multiple SIBs in the system message sent by the access network device to the user equipment.
  • the SIB is divided into multiple types, because the general time-frequency resource information is from the field in the SIB2. Indication, therefore, in order not to add extra workload, the time-frequency resource information is still carried in SIB2.
  • the method further includes:
  • the access network device obtains a preamble sequence space configuration parameter, where the preamble sequence space configuration parameter includes a network load, a system parameter, and a number of user equipments.
  • the preamble sequence space configuration parameters include network load, system parameters, and number of user equipments.
  • the system parameters include user sequence length, collision probability tolerance value, and missed detection probability tolerance. Value, timing estimation error, channel estimation error, bit error rate, available time-frequency resource size, At least one of a computing resource size, a received signal power, and a signal to noise ratio may be used, such that the access network device may determine the preamble sequence information according to the preamble sequence space configuration parameter.
  • the second aspect of the present application provides a method for configuring a preamble sequence, including:
  • the user equipment acquires preamble sequence information sent by the access network device, where the preamble sequence information includes a message for indicating the number of preamble sequences;
  • the user equipment performs random access according to the preamble sequence information.
  • the user equipment needs to select a preamble sequence from the specified number of preamble sequences of the access network device to send to the access network device. Before that, the user equipment acquires the preamble sent by the access network device.
  • the sequence information, the preamble sequence information includes a message for indicating the number of preamble sequences, and the user equipment performs random access according to the received preamble sequence information, so that the user equipment can smoothly access the communication network system smoothly, and the random access failure is reduced. The probability.
  • the preamble sequence information further includes spatial level information, where the spatial level information is used to indicate a code domain space layer of the preamble sequence space.
  • the optional preamble sequence space has a multi-layer code domain space on the code domain, and therefore, the preamble sequence information determined by the access network device is included in addition to In addition to the message indicating the number of preamble sequences, spatial level information for indicating the number of code domain spatial layers of the preamble sequence space is also included.
  • the acquiring, by the user equipment, the preamble sequence information sent by the access network device includes:
  • the user equipment performs blind detection on the PBCH to obtain the MIB, and determines the spatial level information according to the CRC code removed by the blind detection.
  • the access network device Since the access network device generates different CRC codes to check the MIB when the spatial level information is different, and the user equipment obtains the MIB by blindly detecting the PBCH, the spatial level can be accurately obtained according to the removed CRC code. Information, through the verification process can achieve the transmission of spatial level information, reducing signaling overhead.
  • the user equipment performs blind detection on the PBCH to obtain the MIB, and determines the spatial level information according to the CRC code removed by the blind detection, including:
  • the user equipment performs blind detection on the PBCH to obtain the MIB, and determines a CRC design rule according to the CRC code removed by the blind detection, and obtains corresponding spatial level information according to the CRC design rule, the spatial level information and the CRC design rule.
  • the correspondence is known to the access network device and the user equipment.
  • the communication system presets the correspondence between the spatial level information of the user equipment and the access network equipment and the CRC design rule, so that when the spatial level information is different, different CRC design rules are selected.
  • the CRC code is generated, and when the user equipment obtains the MIB by blind detection, the CRC design rule can be determined according to the removed CRC code, thereby accurately obtaining the spatial level information corresponding to the CRC design rule.
  • the acquiring, by the user equipment, the preamble sequence information sent by the access network device includes:
  • the user equipment blindly checks the PBCH to obtain the MIB, and determines the spatial level information according to the decoding sequence used by the blind detection.
  • the user equipment can obtain the space accurately according to the decoding sequence used when the user equipment obtains the MIB by blind detection of the PBCH.
  • the series information can realize the transmission of spatial level information through the process of descrambling code processing, and reduce the signaling overhead.
  • the user equipment performs blind detection on the PBCH to obtain the MIB, and determines the spatial level information according to the decoding sequence used by the blind detection, including:
  • the user equipment performs blind detection on the PBCH to obtain the MIB, and determines a descrambling code design rule according to the decoding sequence used in the blind detection, and obtains corresponding spatial level information according to the descrambling code design rule, the spatial level information and the
  • the correspondence between the descrambling code design rules is well known to the access network device and the user equipment.
  • the communication system presets the correspondence between the spatial level information shared by the user equipment and the access network device and the descrambling code design rule, so that when the spatial level information is different, different solutions are selected.
  • the scrambling code design rule generates a scrambling code sequence to scramble the MIB.
  • the user equipment obtains the MIB by blind detection, the user can determine the descrambling code design rule according to the decoding sequence used, so as to accurately obtain the corresponding descrambling code design rule. Spatial level information.
  • the acquiring, by the user equipment, the preamble sequence information sent by the access network device includes:
  • the user equipment receives the SIB sent by the access network device by using the PDSCH, where the SIB carries the spatial level information in the preamble sequence information;
  • the user equipment parses the SIB to obtain the spatial level information.
  • the system information is divided into the MIB and the multiple SIBs in the system message sent by the access network device to the user equipment.
  • the SIB is divided into multiple types, and the general time-frequency resource information is indicated by the field in the SIB2. Therefore, the spatial level information in the preamble sequence information may also be indicated by the field in the SIB2, so that the SIB2 carries the preamble sequence information, and the user equipment receives the SIB2 sent by the access network device through the PDSCH, and passes through the SIB2 from the SIB2. Analyze the spatial level information.
  • the preamble sequence information further includes time-frequency resource information, where the time-frequency resource information is used to indicate a time-frequency resource occupied by the preamble sequence space in the PRACH.
  • the acquiring, by the user equipment, the preamble sequence information sent by the access network device further includes:
  • the user equipment receives the SIB sent by the access network device by using the PDSCH, where the SIB carries the time-frequency resource information in the preamble sequence information;
  • the user equipment parses the SIB to obtain the time-frequency resource information.
  • the system information is divided into the MIB and the multiple SIBs in the system message sent by the access network device to the user equipment.
  • the SIB is divided into multiple types, because the general time-frequency resource information is indicated by the field in the SIB2. Therefore, in order not to add extra workload, the time-frequency resource information is still carried in SIB2.
  • a third aspect of the present application provides an access network device, including: a processor and a transmitter, where the processor and the transmitter are connected;
  • the processor is configured to determine preamble sequence information, where the preamble sequence information includes a message indicating a quantity of a preamble sequence;
  • the transmitter is configured to send the preamble sequence information to a user equipment, where the preamble sequence information is used for random access by a user equipment.
  • the user equipment needs to select among the specified number of preamble sequences of the access network equipment. Selecting a preamble sequence to send to the access network device, before the processor determines the preamble sequence information according to the preamble sequence space configuration parameter, the preamble sequence information includes a message for indicating the number of preamble sequences, and the transmitter sends the preamble sequence information
  • the user equipment can perform random access according to the preamble sequence information, so that the user equipment can smoothly access the communication network system smoothly, and the probability of random access failure is reduced.
  • the preamble sequence information further includes spatial level information, where the spatial level information is used to indicate a code domain space layer of the preamble sequence space,
  • the processor is further configured to generate a CRC code according to the spatial level information
  • the processor is further configured to perform verification processing on the MIB according to the CRC code
  • the transmitter is configured to send the MIB after the verification process by using a PBCH.
  • the preamble sequence information includes spatial level information, and presets a correspondence between spatial level information well known by the user equipment and the access network device and a CRC design rule, so that when the spatial level information is different, the processor generates different CRC codes.
  • the verification process is performed on the MIB, and the transmitter transmits the MIB after the verification processing through the PBCH.
  • the user equipment obtains the MIB through the blind detection of the PBCH, the spatial level information can be accurately obtained according to the removed CRC code, and the verification process is obtained.
  • the transmission of spatial level information can be realized, and the signaling overhead is reduced.
  • the preamble sequence information further includes spatial level information, where the spatial level information is used to indicate a code domain space layer of the preamble sequence space,
  • the processor is further configured to generate a scrambling code sequence according to the spatial level information
  • the processor is further configured to perform scrambling processing on the MIB according to the scrambling code sequence
  • the transmitter is configured to send the scrambled MIB by using a PBCH.
  • the preamble sequence information includes spatial level information, and presets a correspondence between spatial level information well known by the user equipment and the access network device and a descrambling code design rule, so that when the spatial level information is different, the processor generates different
  • the scrambling code sequence scrambles the MIB, and the transmitter transmits the MIB after the verification processing through the PBCH.
  • the spatial level information can be accurately obtained according to the decoding sequence used.
  • the process of descrambling code processing can realize the transmission of spatial level information and reduce the signaling overhead.
  • the preamble sequence information further includes spatial level information, where the spatial level information is used to indicate a code domain space layer of the preamble sequence space,
  • the transmitter is configured to carry the spatial level information in the preamble sequence information in an SIB;
  • the transmitter is configured to send the SIB by using a PDSCH.
  • the system information is divided into MIBs and multiple SIBs in the system message sent by the access network device to the user equipment before the user equipment is randomly accessed.
  • the SIB is divided into multiple types.
  • the time-frequency resource information is used in the SIB2.
  • the field is indicated by the field. Therefore, the transmitter can indicate that the spatial level information in the preamble sequence information is also indicated by the field in the SIB2, so that the SIB2 carries the spatial level information, and the SIB2 is sent to the user equipment through the PDSCH, so that the user equipment After receiving the SIB2, the spatial level information can be obtained by parsing the fields in the SIB2.
  • the preamble sequence information further includes time-frequency resource information,
  • the time-frequency resource information is used to indicate a time-frequency resource occupied by the preamble sequence space in the PRACH.
  • the processor is further configured to carry the time-frequency resource information in the preamble sequence information in an SIB;
  • the transmitter is further configured to send the SIB by using a PDSCH.
  • the system information is divided into MIBs and multiple SIBs in the system message sent by the access network device to the user equipment before the user equipment is randomly accessed.
  • the SIB is divided into multiple types, because the time-frequency resource information in the prior art is from the SIB2.
  • the field is indicated, therefore, in order not to add extra workload, the processor still carries the time-frequency resource information in SIB2, and the transmitter transmits SIB2 through the PDSCH.
  • the access network device further includes: a receiver;
  • the receiver is specifically configured to obtain a preamble sequence space configuration parameter, where the preamble sequence space configuration parameter includes a network load, a system parameter, and a number of user equipments.
  • the receiver Before the processor determines the preamble sequence information, the receiver needs to obtain the preamble sequence space configuration parameter, where the preamble sequence space configuration parameters include the network load, the system parameter, and the number of user equipments, and the system parameters include the user sequence length, the collision probability tolerance value, and the missed detection probability. At least one of a tolerance value, a timing estimation error, a channel estimation error, a bit error rate, an available time-frequency resource size, an available computing resource size, a received signal power, and a signal-to-noise ratio, so that the receiver can determine the spatial configuration parameter according to the preamble sequence. Lead sequence information.
  • a fourth aspect of the present application provides a user equipment, including: a receiver and a processor, where the receiver is connected to the processor;
  • the receiver is configured to acquire preamble sequence information sent by an access network device, where the preamble sequence information includes a message for indicating a quantity of a preamble sequence;
  • the processor is configured to perform random access according to the preamble sequence information.
  • the user equipment needs to select a preamble sequence from the specified number of preamble sequences of the access network device to send to the access network device. Before this, the receiver obtains the preamble sent by the access network device.
  • the sequence information is obtained by the processor according to the preamble sequence information, so that the user equipment can smoothly access the communication network system smoothly, and the probability of random access failure is reduced.
  • the preamble sequence information further includes spatial level information, where the spatial level information is used to indicate a code domain space layer of the preamble sequence space,
  • the receiver is specifically configured to perform blind detection on the PBCH to obtain a main system information block MIB, and determine spatial level information according to the CRC code removed by the blind detection.
  • the preamble sequence information further includes spatial level information, and presets a correspondence between the spatial level information shared by the user equipment and the access network device and the CRC design rule, so that when the spatial level information is different, different CRC code pairs are generated.
  • the MIB performs verification processing. When the receiver obtains the MIB by blindly checking the PBCH, the spatial level information can be accurately obtained according to the removed CRC code, and the spatial level information can be transmitted through the verification process, and the signaling is reduced. Overhead.
  • the preamble sequence information further includes spatial level information, where the spatial level information is used to indicate a code domain space layer of the preamble sequence space,
  • the receiver is specifically configured to perform blind detection on the PBCH to obtain an MIB, and determine spatial level information according to a decoding sequence used by the blind detection.
  • the preamble sequence information also includes spatial level information, and presets the number of spatial levels known to the user equipment and the access network equipment.
  • the correspondence between the information and the descrambling code design rule is such that when the spatial level information is different, different scrambling code sequences are generated to perform scrambling processing on the MIB, and the user equipment obtains the MIB by blindly checking the PBCH, according to the decoding sequence used.
  • the spatial level information can be accurately obtained, and the spatial level information can be transmitted through the process of descrambling code processing, thereby reducing signaling overhead.
  • the preamble sequence information further includes spatial level information, where the spatial level information is used to indicate a code domain space layer of the preamble sequence space,
  • the receiver is configured to receive, by using a physical downlink shared channel (PDSCH), a system information block (SIB) sent by an access network device, where the SIB carries spatial level information in the preamble sequence information;
  • PDSCH physical downlink shared channel
  • SIB system information block
  • the receiver is further configured to parse the SIB to obtain the spatial level information.
  • the system information is divided into the MIB and the multiple SIBs in the system message sent by the access network device to the user equipment.
  • the SIB is divided into multiple types, and the general time-frequency resource information is indicated by the field in the SIB2. Therefore, the spatial level information in the preamble sequence information can also be indicated by the field in the SIB2, so that the SIB2 carries the preamble sequence information, and the receiver receives the SIB2 sent by the access network device through the PDSCH, and passes through the SIB2 from the SIB2. Analyze the spatial level information.
  • the preamble sequence information further includes time-frequency resource information,
  • the time-frequency resource information is used to indicate a time-frequency resource occupied by the preamble sequence space in the PRACH.
  • the receiver is further configured to receive, by using a PDSCH, an SIB sent by an access network device, where the SIB carries time-frequency resource information in the preamble sequence information;
  • the receiver is further configured to parse the SIB to obtain the time-frequency resource information.
  • the system information is divided into the MIB and the multiple SIBs in the system message sent by the access network device to the user equipment.
  • the SIB is divided into multiple types, and the general time-frequency resource information is indicated by the field in the SIB2. Therefore, in order not to add extra workload, the time-frequency resource information is still carried in the SIB2, and the receiver receives the SIB2 sent by the access network device through the PDSCH, and the time-frequency resource information can be obtained by parsing the SIB2.
  • FIG. 1 is a schematic diagram of a signaling flow of random access of a user equipment
  • FIG. 2 is a schematic diagram of an application scenario or a framework provided by the present application.
  • FIG. 3 is a schematic flowchart diagram of an embodiment of a method for configuring a preamble sequence provided by the present application
  • FIG. 4 is a schematic flowchart diagram of another embodiment of a method for configuring a preamble sequence provided by the present application.
  • FIG. 5 is a schematic flowchart of a MIB process
  • FIG. 6 is a schematic flowchart diagram of still another embodiment of a method for configuring a preamble sequence provided by the present application.
  • FIG. 7 is a schematic diagram of a PBCH CRC code design rule
  • FIG. 8 is a schematic flowchart diagram of still another embodiment of a method for configuring a preamble sequence provided by the present application.
  • FIG. 9 is a schematic structural diagram of an embodiment of an access network device according to the present application.
  • FIG. 10 is a schematic structural diagram of another embodiment of an access network device according to the present application.
  • FIG. 11 is a schematic structural diagram of an embodiment of a user equipment according to the present application.
  • FIG. 12 is a schematic structural diagram of another embodiment of a user equipment according to the present application.
  • the present application provides a configuration method of a preamble sequence, a user equipment, and an access network device, which are used to determine preamble sequence information and notify a user equipment by using an access network device, and the user equipment determines an optional preamble sequence space according to the preamble sequence information, so that the user equipment
  • the communication network system can be randomly accessed.
  • the present application is applied to a wireless communication network system, and can be applied to an LTE system.
  • N user equipments access the core network through an access network device, and the user equipment can be wirelessly connected to the access network device.
  • the access network device may be a network device of a cell, and may be a base station in a cell level sense or a network device having a function similar to a base station, such as a wireless router and an access point (AP).
  • the access network device may be a network device that provides wireless access and communication services for mobile devices that are mobile or fixed in the cell. All user equipments served by the access network device include user equipments that access the access network equipment and user equipments that reside on the network provided by the access network equipment.
  • the RA Before the user equipment UE communicates with the access network device, the RA needs to be performed first, and before the RA, the LTE system needs to specify an optional preamble sequence space on the PRACH, so that the UE selects the bearer preamble from the optional preamble sequence space in the RA process.
  • the preamble sequence space of the sequence so that the preamble sequence can be smoothly transmitted to the eNB, and the preamble sequence is across the time domain, the frequency domain and the code domain, and the optional preamble sequence space has a time-frequency resource and a code domain space.
  • a resource for resolving an RA collision between multiple UEs is composed of a PRACH time-frequency resource and a preamble sequence.
  • the PRACH and the Physical Uplink Shared Channel (PUSCH) and the Physical Uplink Control Channel (PUCCH) are multiplexed in the time-frequency domain, and the time-frequency resources of the PRACH are semi-statically distributed on the PUSCH. Within the range, and the cycle is repeated.
  • the resource configuration of the PRACH determines the resource allocation for RA and data transmission. The more time-frequency resources allocated to the PRACH, the less time-frequency resources are used for data transmission.
  • the preamble sequence can distinguish different UEs on the same PRACH time-frequency resource.
  • the preamble sequence of LTE is obtained by cyclic shift of the ZC sequence.
  • An LTE cell has 64 preamble sequences, partially used for non-contention RA, and there are fewer than 64 preamble sequences for competing RA.
  • the base of the UE is very large. It is assumed that all the preamble sequences are used to compete for RA, but the number of 64 preamble sequences relative to the UE is still very small, so the RA conflicts. The probability will increase.
  • the case where the preamble sequence is originally allocated by the time-frequency resource can increase the code without increasing the occupancy rate of the time-frequency resource.
  • the division on the domain that is, the new preamble sequence is across time domain, frequency domain and code domain, assuming that the number of preamble sequences per layer is 64, and when the code domain space is 1 layer, the number of preamble sequences 64; when the code domain space is 2 layers, the number of preamble sequences can be 128; when the code domain space is 4 layers, the number of preamble sequences is 256. For each additional number of layers in the code domain space, the number of available preamble sequences is increased by 64.
  • the system information acquired by the UE through the SIB2 includes: the RA channel parameter, the preamble sequence format of the cell, the number and sequence number of the ZC (Zadoff-Chu) root sequence, the preamble sequence and the recessive information, and the correspondence between the recessive information. Relationship, power incremental compensation (greater than or equal to 0dB) and the maximum number of retransmissions of the preamble sequence.
  • the UE obtains preamble sequence information by receiving the system information block SIB2.
  • the PRACH time-frequency resources available to the cell corresponding to the access network device are determined by the prach-ConfigIndex and the prach-FrequencyOffset field of the SIB2. Once these two fields are determined, the format of the preamble sequence and the optional PRACH resources are fixed for all UEs accessing the cell.
  • the PRACH configuration information in SIB2 is as follows:
  • radioResourceConfigCommon prach-Config
  • rootSequenceIndex 0x7% is used to generate a logical Za-doff sequence index of Signature, each logical index corresponding to a physical ZC sequence. This value is generally set according to the network plan configuration. The current parameter is set to 7, and the corresponding physical ZC sequence is 629.
  • prach-ConfigIndex 0x6% This value is used together with the preamble sequence format to determine the preamble frequency/time domain resources.
  • the current parameter is set to 6, corresponding to the preamble sequence format 0, which can occupy the first or sixth subframe resources of any system frame.
  • HighSpeedFlag FALSE% high speed mobile cell indication. That is, whether the high-speed moving scene is covered, and the current parameter is set to False, indicating that the high-speed moving scene is not covered.
  • zeroCorrelationZoneConfig 0x2% zero autocorrelation zone configuration index.
  • the random access preamble sequence is generated by a ZC sequence with constant amplitude zero autocorrelation (CAZAC).
  • CAZAC constant amplitude zero autocorrelation
  • the physical root sequence is obtained by a logical root sequence, and then the physical root sequence is cyclically shifted.
  • the zero autocorrelation zone configuration index is directly related to the selection of Ncs. The value ranges from 0 to 15.
  • prach-FreqOffset offset value of the starting position of the frequency domain resource occupied by each PRACH of the 0x6% Frequency Division Duplexing (FDD) cell.
  • SIB2 mainly has three parts, including public radio resource configuration information, timers and constants, and frequency information. In addition to this, the cell access prohibition related information is also included.
  • the existing SIB2RACH configuration information is as follows:
  • radioResourceConfigCommon rach-ConfigCommon
  • n52% reserves the number of RA preamble sequences used for the contention mode.
  • the PRACH preamble sequence has 64.
  • the current parameter setting 52 indicates that 52 preamble sequences are used for the contention mode RA.
  • sizeofRA-PreamblesGroupA Number of RA preamble sequences in the n28%A group.
  • the RA preamble sequence based on the competition mode is divided into two groups, group A and group B.
  • messageSizeGroupA Determines the threshold/bit of the size of Msg3 when the UE selects the A group preamble sequence during the random access procedure. When the current parameter is set to 56, that is, when Msg3 is less than 56 bits, group A is selected.
  • messagePowerOffsetGroupB dB10% is used for the selection of the UERA preamble sequence B group. The default is 10dB.
  • preambleInitialReceivedTargetPower dBm-104% preamble sequence initial received power target.
  • the target power level desired by the eNB when the preamble detection performance is satisfied.
  • the current parameter setting -104 dBm, the expected power value is used to calculate the initial transmit power of the preamble sequence.
  • preambleTransMax The maximum number of retransmissions of the n10%RA preamble sequence.
  • the current parameter setting is 10, that is, the maximum retransmission is 10 times.
  • ra-ResponseWindowSize sf10% randomly responds to the receive window. If the RAR is not received in the window period, the uplink synchronization fails, and the current parameter sets sf10, that is, 10 subframe lengths.
  • mac-ContensionResolutionTimer The effective duration that the UE waits to receive Msg4 during sf64%RA. Start when the UE first transmits or retransmits Msg3. The UE receives the NACK feedback of Msg4 or Msg3 before the timeout, and the timer stops. If the timer expires, the RA fails and the UE re-routes the RA.
  • the current parameter setting is sf64, which is 64 subframe lengths.
  • maxHARQ-Msg3Tx Hybrid Automatic Repeat reQuest (HARQ) maximum transmission times of 0x5%Msg3.
  • the current parameter setting is 5, which is 5 times.
  • the UE obtains the preamble sequence information by receiving the system information block SIB2, and the available PRACH time-frequency resources (ie, the optional preamble sequence space) of the cell corresponding to the eNB are the prach-ConfigIndex and the prach-FrequencyOffset in the SIB2.
  • the LTE system has no means to inform the UE of the preamble sequence information, and therefore, the UE cannot transmit the preamble sequence across the time domain, the frequency domain, and the code domain.
  • a method for configuring a preamble sequence of interaction between an access network device and a user equipment in the above system architecture or scenario will be described below by way of an embodiment.
  • an embodiment of the present application provides a method for configuring a preamble sequence, including:
  • the access network device determines preamble sequence information.
  • the access network device determines the preamble sequence information according to the preamble sequence space configuration parameter, where the preamble sequence information is used to indicate the preamble sequence. The number of messages.
  • the access network device sends the preamble sequence information to the user equipment, where the user equipment receives the preamble sequence information.
  • the access network device after determining the preamble sequence information, the access network device does not know the preamble sequence information.
  • the preamble sequence cannot be sent in the RA process. Therefore, the access network device needs to send the preamble sequence information to the user equipment through a channel such as PBCH or PDSCH.
  • the user equipment obtains the preamble sequence information sent by the access network device through a channel such as PBCH or PDSCH. .
  • the user equipment performs random access according to the preamble sequence information.
  • the user equipment may select one preamble sequence from the specified number of preamble sequences to send to the access network device for random access according to the received preamble sequence information.
  • the user equipment in the random access process of the user equipment, the user equipment needs to select a preamble sequence from the specified number of preamble sequences of the access network device to be sent to the access network device, and before that, the access network device
  • the preamble sequence information is determined according to the preamble sequence space configuration parameter, and the preamble sequence information includes a message for indicating the number of the preamble sequence, and the preamble sequence information is sent to the user equipment, so that the user equipment can perform random access according to the preamble sequence information, so that the user equipment A smooth random access communication network system can reduce the probability of random access failure.
  • the preamble sequence information includes a message indicating the number of preamble sequences.
  • the preamble sequence information also includes spatial level information, and the spatial level information is used to indicate the number of code domain space layers of the preamble sequence space.
  • the time-frequency resource information in the preamble sequence information in the prior art is transmitted through the SIB2, and then the spatial level information may be explicitly sent to the SIB2.
  • the user equipment can also inform the user equipment in an implicit manner, which is not limited.
  • the explicit mode can be used to add signaling in the SIB2.
  • the embodiment of the present application provides a method for configuring a preamble sequence, including:
  • the access network device obtains a preamble sequence space configuration parameter.
  • the access network device before determining the preamble space, the access network device needs to know the size of the preamble sequence space, that is, the number of preamble sequences in the preamble sequence space, and then the preamble sequence space configuration parameter needs to be obtained.
  • the access network device may collect the preamble sequence space configuration parameters in a certain period, where the preamble sequence space configuration parameters include network load, system parameters, and number of user equipments, and may also include the number of access users, system performance parameters, and preamble sequences. Parameters such as length.
  • the period may be a broadcast period.
  • the access network device determines preamble sequence information.
  • step 301 in which the preamble sequence information further includes spatial level information.
  • the access network device carries the spatial level information in the preamble sequence information in the SIB.
  • the access network device determines the preamble sequence information
  • the user equipment does not know the preamble sequence information, and the preamble sequence cannot be sent in the RA process. Therefore, the access network device needs to notify the user equipment of the preamble sequence information.
  • the time-frequency resource information of the preamble sequence space is indicated by the prach-ConfigIndex and the prach-FrequencyOffset field in the SIB2. Therefore, the time-frequency resource information is used in the prach-ConfigIndex and the prach-FrequencyOffset field in the SIB2. It is shown that a field is added to the SIB2 to indicate the spatial level information (that is, the code domain space layer).
  • the SIB2RACH configuration information in this embodiment is as follows:
  • radioResourceConfigCommon rach-ConfigCommon
  • n52% reserves the number of random access preamble sequences used by the contention mode.
  • the PRACH preamble sequence has 64.
  • sizeofRA-PreamblesGroupA n28% of group A random access preamble sequences.
  • messageSizeGroupA The threshold/bit of the msg3 size is determined by the UE when the UE selects the A group preamble during the random access procedure.
  • messagePowerOffsetGroupB dB10% is used for the UE to randomly select the Preamble B group.
  • preambleInitialReceivedTargetPower dBm-104% preamble sequence initial received power target.
  • preambleTransMax The maximum number of retransmissions of the n10% random access preamble sequence.
  • ra-ResponseWindowSize sf10% randomly responds to the receive window.
  • mac-ContensionResolutionTimer The effective duration that the UE waits to receive Msg4 during sf64%RA.
  • maxHARQ-Msg3Tx The maximum number of HARQ transmissions of 0x5%Msg3.
  • the current parameter is set to 5, that is, 5 times.
  • the third line "numberofRA-PreamblesCode:nxx" is used to indicate the number of code domain space layers, n is a decimal number, and xx is a specific spatial layer number.
  • the space level is expressed in decimal notation, and no coding is involved when indicated.
  • the optional preamble sequence corresponding to 00 is 64.
  • the binary representation 01
  • the access network device sends the SIB through the PDSCH, and the user equipment receives the SIB through the PDSCH.
  • the user equipment transmits the SIB2 through the PDSCH, and the user equipment receives the SIB sent by the access network device through the PDSCH, and obtains the SIB2 from the SIB.
  • the user equipment parses the SIB to obtain spatial level information.
  • the user equipment parses the field in the SIB2 to obtain the preamble sequence information.
  • the user equipment performs random access according to the preamble sequence information.
  • step 303 For details, please refer to step 303.
  • the access network device may indicate that the spatial level information in the preamble sequence information is indicated by the field in the SIB2, so that the SIB2 carries the preamble sequence information, and sends the SIB2 to the user equipment through the PDSCH, so that the user equipment can After receiving the SIB2 in the SIB, the preamble sequence information is obtained simply and quickly by parsing the fields in the SIB2.
  • the access network device notifies the user equipment by carrying the spatial level information in the SIB. Although the user equipment can obtain the spatial level information simply and quickly, the signaling overhead is increased because the SIB2 is in the SIB2. A field is added to represent the spatial level information. If you want to transmit the spatial level information without increasing the signaling overhead, you can only consider the information transfer in the MIB processing process in the system information, as shown in Figure 5.
  • the processing steps before sending the MIB to the access network device are as follows:
  • Step 501 In the LTE system, the access network device transmits the basic information required by the system to the user equipment through the PBCH, and the basic information is included in the MIB, so the access network device needs to generate the MIB, because it is a prior art. Without too much explanation, the MIB includes a limited number of the most important and most commonly used transmission parameters;
  • Step 502 Perform verification processing on the MIB by using a preset CRC code, that is, adding a CRC code after the MIB, to ensure that the data of the MIB during transmission is correct, and the user equipment must accurately remove the CRC during blind detection. Code to get MIB;
  • Step 503 In the LTE system, the MIB is generally processed in a 1:3 convolution manner, that is, the number of bits before encoding/the number of bits after encoding is 1/3, in order to increase redundant bits and improve verification performance;
  • Step 504 According to the bearer capability of the PBCH in the actual situation, the transmission rate of the MIB must be adjusted to match the bearer capability of the PBCH.
  • Step 505 The MIB is scrambled by using a preset scrambling code sequence to perform encryption, and the user equipment can obtain the MIB through the corresponding decoding sequence.
  • Step 506 Perform digital modulation on the MIB by using a Quadrature Phase Shift Keyin (QPSK) modulation method;
  • QPSK Quadrature Phase Shift Keyin
  • Step 507 The MIB after QPSK modulation is placed in a corresponding time-frequency resource location in the PBCH.
  • Step 508 Finally, Orthogonal Frequency Division Multiplexing (OFDM) is formed, that is, the MIB is included and transmitted in the OFDM symbol.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the spatial level information is transmitted using the CRC code and the descrambling code sequence, respectively, and will be described in detail below.
  • an embodiment of the present application provides a method for configuring a preamble sequence, including:
  • the access network device obtains a preamble sequence space configuration parameter.
  • the access network device determines preamble sequence information.
  • step 402 where the preamble sequence information further includes time-frequency resource information.
  • the access network device carries the time-frequency resource information in the preamble sequence information in the SIB.
  • the time-frequency resource information of the preamble sequence space is indicated by the prach-ConfigIndex and the prach-FrequencyOffset field in the SIB2 in the prior art. Therefore, the time-frequency resource information is used in the prach-ConfigIndex in the SIB2. And the prach-FrequencyOffset field indicates that the extra workload of the access network device can be reduced according to the existing method.
  • the access network device generates a CRC code according to the spatial level information.
  • the existing CRC codes are as shown in FIG. 7, and there are mainly three types, which correspond to 1, 2, and 4 antenna ports respectively.
  • the CRC code is preferably 16 bits. Helps to follow the channel coding And the rate matching operation, but not limited to 16 bits, the CRC design rule and the spatial level information must have a corresponding relationship, and the corresponding relationship is well known to the user equipment and the access network device. For example, the number of code domain space layers indicated by the spatial series information is 4 layers, and the CRC code generated corresponding to the CRC design rule is (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0).
  • the code domain space layer is 3 layers, and the corresponding CRC code is (0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ,0 , 0, 1, 0).
  • the specific form of the CRC code can have multiple variations.
  • the 16-bit CRC code has all kinds of possibilities. Therefore, the CRC design rule can be selected from the mode, and the access network device determines the correspondence according to the spatial level information.
  • the CRC design rules and generates a CRC code based on the CRC design rules.
  • the access network device performs verification processing on the MIB according to the CRC code.
  • the access network device performs verification processing on the MIB, and adds the CRC code to the back of the MIB.
  • the access network device sends the MIB after the verification process through the PBCH, and the user equipment performs blind detection on the PBCH to obtain the MIB.
  • the access network device performs the foregoing steps 503 to 508 on the MIB after the check processing, and the MIB is included in the OFDM symbol, and the OFDM symbol is sent through the PBCH, and the user equipment blinds the OFDM symbol in the PBCH. Check the MIB.
  • the user equipment determines spatial level information according to the CRC code removed by the blind detection.
  • the user equipment since the CRC design rule and the spatial level information must have a corresponding relationship, and the corresponding relationship is common to the user equipment and the access network device, the user equipment performs blind detection on the OFDM symbol in the PBCH to obtain the MIB.
  • the corresponding CRC design rule can be determined according to the removed CRC code, and the spatial level information can be obtained according to the correspondence between the CRC design rule and the spatial level information.
  • the access network device sends the SIB through the PDSCH, and the user equipment receives the SIB sent by the access network device by using the PDSCH.
  • the access network device sends the SIB through the PDSCH, and the SIB includes the SIB2, and the user equipment receives the SIB sent by the access network device through the PDSCH.
  • the user equipment parses the SIB to obtain time-frequency resource information.
  • the user equipment after receiving the SIB, parses the SIB2 in the SIB to obtain time-frequency resource information.
  • the user equipment performs random access according to the preamble sequence information.
  • step 303 For details, please refer to step 303.
  • the time-frequency resource information in the prior art is indicated by the field in the SIB2
  • the time-frequency resource information is still carried in the SIB2
  • the user equipment and the access network device are preset.
  • the known spatial series information and the CRC design rule when the spatial level information is different, different CRC codes are generated to perform verification processing on the MIB, and when the user equipment obtains the MIB through blind detection of the PBCH, according to the removed
  • the CRC code can accurately obtain the spatial level information, and the spatial level information can be transmitted through the verification process, thereby reducing the signaling overhead.
  • step 606 and 608 are not limited, but step 607 must be after step 606, and step 609 must be after step 608.
  • a method for configuring a preamble sequence in the embodiment of the present application includes:
  • the access network device obtains a preamble sequence space configuration parameter.
  • the access network device determines preamble sequence information.
  • the access network device carries the time-frequency resource information in the preamble sequence information in the SIB.
  • the access network device generates a scrambling code sequence according to the spatial level information.
  • the scrambling code is a Gold code whose order is 31 steps according to the cell ID, and a sequence with different code phases is used as the scrambling code sequence, and the code phase has 4 types (0, 1, 2 and 3), corresponding to 4 segments in 40ms, the original 4 code phases correspond to the 0th-level code domain space.
  • the code phase of the generated scrambling code sequence is not only used.
  • the correspondence between the code phase design scheme and the spatial level information is as shown in Table 1.
  • the initial code phase scheme indicates that the initial code phase of the prior art scrambling sequence has four types (0, 1, 2, and 3) corresponding to the spatial level information having the 0th level space (ie, only 1).
  • the code phase space layer); the code phase design 1 indicates that the code phase of the scrambling code sequence of the present application has four kinds (4, 5, 6, and 7), and the spatial level information corresponding to the four code phases is With 0th and 1st level space (that is, with 2 code domain space layers), the same reason, code phase design 2 and 3 are to represent spatial series information as having 3 and 4 code domain spatial layers, code
  • the phase design scheme is the descrambling code design rule;
  • Table 2 it is another way of designing the code phase.
  • the commonality with the way of code phase design in Table 1 is that it is designed to have 4 different codes in a transmission period of 40 ms in one PBCH. a sequence of scrambling codes of the phase to represent different spatial level information;
  • the access network device determines a corresponding code phase design scheme according to the code domain spatial layer indicated by the spatial level information, and the code phase design scheme is a descrambling code design rule, and generates a disturbance with four different code phases according to the descrambling code design rule.
  • the code sequence, and the descrambling code design rules are well known to the user equipment and the access network equipment.
  • the access network device performs scrambling processing on the MIB according to the scrambling code sequence.
  • the access network device performs scrambling processing on the MIB according to the generated scrambling code sequence, and the process of performing scrambling code processing according to the scrambling code sequence is the same as the prior art, and is not specifically described herein.
  • the access network device sends the scrambling code processed MIB through the PBCH, and the user equipment performs blind detection on the PBCH to obtain the MIB.
  • the access network device performs the processing of step 506 to step 508 on the scrambled MIB, and the scrambled MIB is included in the OFDM symbol, and the OFDM symbol is sent through the PBCH, and the user equipment is in the PBCH.
  • the OFDM symbol is blindly checked to obtain the MIB.
  • the user equipment determines spatial level information according to a decoding sequence used by the blind detection.
  • the user equipment since the descrambling code design rule and the spatial level information must have a corresponding relationship, and the corresponding relationship is common to the user equipment and the access network device, the user equipment performs blind detection on the OFDM symbol in the PBCH.
  • the corresponding descrambling code design rule can be determined, according to the correspondence between the descrambling code design rule and the spatial level information. Can get spatial level information.
  • the access network device sends the SIB through the PDSCH, and the user equipment receives the SIB sent by the access network device by using the PDSCH.
  • the user equipment parses the SIB to obtain time-frequency resource information.
  • the user equipment performs random access according to the preamble sequence information.
  • step 303 For details, please refer to step 303.
  • the time-frequency resource information in the prior art is indicated by the field in the SIB2
  • the time-frequency resource information is still carried in the SIB2
  • the user equipment and the access network device are preset.
  • Corresponding relationship between the known spatial series information and the descrambling code design rule so that when the spatial level information is different, different scrambling code sequences are generated to scramble the MIB, and when the user equipment obtains the MIB through blind detection of the PBCH, According to the decoding sequence used by the blind detection, the spatial level information can be accurately obtained, and the spatial level information can be transmitted through the descrambling code process, thereby reducing the signaling overhead.
  • step 707 must be after step 806, and step 809 must be after step 808.
  • the CRC code and the descrambling code sequence are respectively used to transmit the spatial level information, and in the specific implementation process, the CRC code and the solution/scrambling code sequence may also be used for transmission.
  • the spatial series information that is, the CRC design rule and the descrambling code design rule have a corresponding relationship with the spatial series information.
  • the spatial series information has the 0th, 1st and 2nd level spaces (3 layers), and the generated CRC code is ( 1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1), the four code phases of the scrambling sequence are (0,1,3,5 ), when the user terminal is blindly checked, it can be based on the removed CRC code and decoding sequence. Get the corresponding spatial level information.
  • the foregoing embodiment describes a method for configuring a preamble sequence.
  • the following embodiments respectively describe an access network device and a user equipment.
  • an embodiment of the present application provides an access network device, including:
  • the processor 901 is configured to determine preamble sequence information, where the preamble sequence information includes a message for indicating a quantity of the preamble sequence;
  • the transmitter 902 is configured to send the preamble sequence information to the user equipment, where the preamble sequence information is used for random access by the user equipment.
  • the processor 901 determines the preamble sequence information according to the preamble sequence space configuration parameter, where the preamble sequence information includes a message for indicating the number of preamble sequences, and the transmitter 902 sends the preamble sequence information to the user equipment, so that the user equipment can The random access is performed according to the preamble sequence information, so that the user equipment can smoothly access the communication network system smoothly, and the probability of random access failure is reduced.
  • the preamble sequence information further includes spatial level information, where the spatial level information is used to indicate a code domain space layer of the preamble sequence space.
  • the processor 901 is further configured to generate a CRC code according to the spatial level information.
  • the processor 901 is further configured to perform verification processing on the MIB according to the CRC code.
  • the transmitter 902 is configured to send the check processed MIB through the PBCH.
  • the preamble sequence information includes spatial level information, and the correspondence between the spatial level information well-known by the user equipment and the access network device and the CRC design rule is preset, so that when the spatial level information is different, the processing is performed.
  • the 901 generates a different CRC code to perform verification processing on the MIB, and the transmitter 902 transmits the MIB after the verification processing through the PBCH, and when the user equipment obtains the MIB by blindly detecting the PBCH, the space can be accurately obtained according to the removed CRC code.
  • the series information can realize the transmission of spatial level information through the verification process, which reduces the signaling overhead.
  • the preamble sequence information further includes spatial level information, where the spatial level information is used to indicate a code domain space layer of the preamble sequence space.
  • the processor 901 is further configured to generate a scrambling code sequence according to the spatial level information.
  • the processor 901 is further configured to perform scrambling processing on the MIB according to the scrambling code sequence
  • the transmitter 902 is configured to send the scrambled MIB through the PBCH.
  • the preamble sequence information includes spatial level information, and the correspondence between the spatial level information well known by the user equipment and the access network device and the descrambling code design rule is preset, so that when the spatial level information is different
  • the processor 901 generates different scrambling code sequences to perform scrambling processing on the MIB, and the transmitter 902 transmits the MIB after the verification processing through the PBCH, and the user equipment can obtain the MIB by blindly checking the PBCH, according to the decoding sequence used. Accurately obtain the spatial level information, and the process of descrambling code processing can realize the transmission of spatial level information and reduce the signaling overhead.
  • the preamble sequence information further includes spatial level information, where the spatial level information is used to indicate a code domain space layer of the preamble sequence space.
  • a transmitter 902 configured to carry the spatial level information in the preamble sequence information in the SIB;
  • the transmitter 902 is configured to send the SIB through the PDSCH.
  • the system information is divided into the MIB and the multiple SIBs, and the SIB is divided into multiple types.
  • the time-frequency resource information is Indicated by the field in the SIB2, therefore, the transmitter 902 can also indicate the spatial level information in the preamble sequence information through the field in the SIB2, thereby implementing the spatial level information in the SIB2, and sending the SIB2 to the user through the PDSCH.
  • the device enables the user equipment to obtain spatial level information by parsing the fields in the SIB2 after receiving the SIB2.
  • the preamble sequence information includes time-frequency resource information, where the time-frequency resource information is used to indicate a time-frequency resource occupied by the preamble sequence space in the PRACH.
  • the processor 901 is configured to carry time-frequency resource information in the preamble sequence information in the SIB.
  • the transmitter 902 is configured to send the SIB through the PDSCH.
  • the system information is divided into the MIB and the multiple SIBs, and the SIB is divided into multiple types, because the time-frequency resource information in the prior art It is indicated by the field in SIB2. Therefore, in order not to add extra workload, the processor 901 still carries the time-frequency resource information in the SIB2, and the transmitter 902 transmits the SIB2 through the PDSCH.
  • the access network device further includes: a receiver 903;
  • the receiver 903 is specifically configured to obtain a preamble sequence space configuration parameter, where the preamble sequence space configuration parameter includes a network load, a system parameter, and a number of user equipments.
  • the access network device 1000 may include a processor 1001, a transmitter 1002, a receiver 1003, and a memory 1004.
  • the memory 1004 can be used to store code and the like executed by the processor 1001.
  • the various components in the access network device 1000 are coupled together by a bus system 1005, which in addition to the data bus includes a power bus, a control bus, and a status signal bus.
  • the access network device 900 shown in FIG. 9 or the access network device 1000 shown in FIG. 10 can implement the processes on the access network device side implemented in the embodiment of the foregoing preamble sequence configuration method. Let me repeat.
  • the above method embodiments of the present application may be applied to a processor or implemented by a processor.
  • the processor may be an integrated circuit chip with signal processing capabilities.
  • each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the above processor 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.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • Programming logic devices, discrete gates or transistor logic devices, discrete hardware components The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • 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 the embodiments of the present application may be directly implemented by the hardware decoding processor, or may be performed 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, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method.
  • the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be a read-only memory (ROM), a programmable read only memory (ROMM), an erasable programmable read only Memory (erasable PROM, EPROM), electrically erasable 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
  • DDR SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronously connected dynamic random access memory
  • DR RAM direct memory bus random access memory
  • an embodiment of the present application provides a user equipment, including:
  • the receiver 1101 is configured to acquire preamble sequence information sent by the access network device, where the preamble sequence information includes a message for indicating a quantity of the preamble sequence;
  • the processor 1102 is configured to perform random access according to the preamble sequence information.
  • the receiver 1101 acquires preamble sequence information sent by the access network device, where the preamble sequence information includes a message for indicating the number of preamble sequences, and the processor 1102 performs the preamble sequence information according to the preamble sequence information. Random access enables the user equipment to smoothly access the communication network system smoothly, reducing the probability of random access failure.
  • the preamble sequence information further includes spatial level information, where the spatial level information is used to indicate a code domain space layer of the preamble sequence space.
  • the receiver 1101 is specifically configured to perform blind detection on the PBCH to obtain an MIB, and determine spatial level information according to the CRC code removed by the blind detection.
  • the preamble sequence information further includes spatial level information, and preset correspondence between spatial level information and CRC design rules shared by the user equipment and the access network device, so that when the spatial level information is different, A different CRC code is generated to perform verification processing on the MIB.
  • the receiver 1101 obtains the MIB by blindly checking the PBCH, the spatial level information can be accurately obtained according to the removed CRC code, and the spatial level information can be realized through the verification process. Transmission reduces signaling overhead.
  • the preamble sequence information further includes spatial level information, where the spatial level information is used to indicate a code domain space layer of the preamble sequence space.
  • the receiver 1101 is specifically configured to perform blind detection on the PBCH to obtain an MIB, and determine spatial level information according to a decoding sequence used by the blind detection.
  • the preamble sequence information further includes spatial level information, and presets a correspondence between spatial level information well known by the user equipment and the access network device and a descrambling code design rule, so that the spatial level information is different.
  • the MIB is scrambled.
  • the receiver 1101 obtains the MIB by blindly checking the PBCH, the spatial level information can be accurately obtained according to the decoding sequence used, and the descrambling code is processed. The process can realize the transmission of spatial level information and reduce the signaling overhead.
  • the preamble sequence information includes spatial level information, and the spatial level information is used to indicate a code domain space layer of the preamble sequence space.
  • a receiver 1101 configured to receive, by using a PDSCH, an SIB sent by an access network device, where the SIB carries spatial level information in the preamble sequence information;
  • the receiver 1101 is further configured to parse the SIB to obtain spatial level information.
  • the system information is divided into the MIB and the multiple SIBs, and the SIB is divided into multiple types.
  • the time-frequency resource information is It is indicated by the field in the SIB2. Therefore, the spatial level information in the preamble sequence information can also be indicated by the field in the SIB2, so that the preamble sequence information is carried in the SIB2, and the receiver 1101 receives the access network device through the PDSCH.
  • the transmitted SIB2 can obtain the preamble sequence information simply and quickly by parsing the spatial level information and the time-frequency resource information from the SIB2.
  • the preamble sequence information further includes time-frequency resource information, where the time-frequency resource information is used to indicate a time-frequency resource occupied by the preamble space in the PRACH.
  • the receiver 1101 is configured to receive, by using a PDSCH, an SIB sent by an access network device, where the SIB carries time-frequency resource information in the preamble sequence information.
  • the receiver 1101 is further configured to parse the SIB to obtain time-frequency resource information.
  • the system information is divided into the MIB and the multiple SIBs, and the SIB is divided into multiple types, because the time-frequency resource information in the prior art It is indicated by the field in the SIB2. Therefore, the time-frequency resource information is still carried in the SIB2 without adding an extra workload.
  • the receiver 1101 receives the SIB2 sent by the access network device through the PDSCH, and the analysis can be obtained. Frequency resource information.
  • the user equipment 1200 may include a processor 1202, a receiver 1201, a memory 1203, a display 1204, a speaker 1205, a transmitter 1206, an input device 1207, and the like.
  • the memory 1203 can be used to store code and the like executed by the processor 1202.
  • bus system 1208 which in addition to the data bus includes a power bus, a control bus, and a status signal bus.
  • the access network device 1100 shown in FIG. 11 or the access network device 1200 shown in FIG. 12 can implement various processes on the user equipment side implemented in the foregoing embodiment of the preamble sequence space configuration method. To avoid repetition, details are not described herein again. .
  • the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application.
  • the implementation process constitutes any limitation.

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Abstract

本申请提供了前导序列的配置方法、用户设备及接入网设备，使得用户设备可以随机接入通信网络系统，减少随机接入失败的概率。本申请实施例方法包括：接入网设备确定前导序列信息，前导序列信息包括用于指示前导序列的数量的消息；接入网设备将前导序列信息发送给用户设备，前导序列信息用于供用户设备进行随机接入。

Description

前导序列的配置方法、用户设备及接入网设备
本申请要求于2016年7月26日提交中国专利局、申请号为201610594750.5、申请名称为“前导序列的配置方法、用户设备及接入网设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及通信技术领域，尤其涉及前导序列的配置方法、用户设备及接入网设备。
背景技术
现今通信系统面临大规模连接、低时延及高可靠性传输等方面的挑战。例如，在物联网(Internet of things，IoT)中，主要服务场景是海量和/或高可靠机器类型通信(Machine-Type Communications，MTC)。海量MTC的主要特点有：海量连接、小数据包及低代价等。因此，IoT对于接入资源提出了更高要求。在蜂窝移动通信系统中，接入资源是指用户设备(User Equipment，UE)在开始与网络通信之前的接入过程中随机地选择前导序列(Preamble)。由于UE是随机选取前导序列的，那么存在多个UE同时传输相同前导序列的可能性，会导致随机接入(Random Access，RA)冲突。
基于竞争的RA过程如图1所示，第1步、UE在通信网络系统指定的物理RA信道(Physical Random Access Channel，PRACH)上向接入网设备发送Msg1，Msg1即用于RA的前导序列；第2步、接入网设备根据接收到的前导序列的检测结果，发送Msg2，Msg2即随机接入响应(Random Access Response，RAR)；第3步、没有RA冲突的UE向接入网设备传送确切的Msg3，Msg3即RA过程消息，例如，跟踪区域更新或调度请求等)；第4步、接入网设备解决多个UE之间的竞争，向UE反馈Msg4。
前导序列可以区分同一PRACH时频资源上的不同UE。如果存在多于1个UE在同一PRACH时频资源上传输相同的前导序列，则会发生随机接入冲突，导致随机接入失败。
发明内容
本申请提供了前导序列的配置方法、用户设备及接入网设备，使得用户设备可以随机接入通信网络系统，减少随机接入失败的概率。
本申请第一方面提供一种前导序列的配置方法，包括：
接入网设备确定前导序列信息，所述前导序列信息包括用于指示前导序列的数量的消息；
所述接入网设备将所述前导序列信息发送给用户设备，所述前导序列信息用于供用户设备进行随机接入。
在用户设备的随机接入过程中，用户设备需要在接入网设备指定数量的前导序列中选 择出一个前导序列发送至接入网设备，在此之前，接入网设备根据前导序列空间配置参数确定前导序列信息，前导序列信息包括用于指示前导序列的数量的消息，将前导序列信息发送给用户设备，使得用户设备能够根据前导序列信息进行随机接入，使得用户设备可以顺利的随机接入通信网络系统，减少了随机接入失败的概率。
结合本申请第一方面，本申请第一方面第一实施方式中，所述前导序列信息还包括空间级数信息，所述空间级数信息用于指示前导序列空间的码域空间层数。
因为前导序列是跨时域、频域和码域的，那么可选前导序列空间在码域上是具有多层码域空间的，因此，接入网设备确定的前导序列信息中除了包括用于指示前导序列的数量的消息之外，还包括用于指示前导序列空间的码域空间层数的空间级数信息。
结合本申请第一方面第一实施方式，本申请第一方面第二实施方式中，所述接入网设备将所述前导序列信息发送给用户设备，包括：
所述接入网设备根据所述空间级数信息生成CRC码；
所述接入网设备根据所述CRC码对MIB进行校验处理；
所述接入网设备通过PBCH发送校验处理后的所述MIB。
在用户设备随机接入之前，接入网设备向用户设备发送的系统消息中，系统信息分成主系统信息块(Master Information Block，MIB)和多个SIB，根据空间级数信息生成循环冗余校验(Cyclic Redundancy Check,CRC)码，对MIB进行校验处理，而用户设备通过对PBCH盲检得到MIB时，根据去除的CRC码就能准确的得到空间级数信息，通过校验过程就能实现空间级数信息的传输，减少了信令开销。
结合本申请第一方面第二实施方式，本申请第一方面第三实施方式中，所述接入网设备根据所述空间级数信息生成CRC码，包括：
所述接入网设备根据所述空间级数信息确定对应的CRC设计规则，并根据所述CRC设计规则生成CRC码，所述空间级数信息与所述CRC设计规则的对应关系为所述接入网设备和所述用户设备所共知。
在用户设备随机接入之前，通信系统预设了用户设备和接入网设备所共知的空间级数信息与CRC设计规则的对应关系，使得空间级数信息不同时，选择不同的CRC设计规则生成CRC码，用户设备在盲检得到MIB时，根据去除的CRC码就能确定CRC设计规则，从而准确的得到与CRC设计规则对应的空间级数信息。
结合本申请第一方面第一实施方式，本申请第一方面第四实施方式中，所述接入网设备将所述前导序列信息发送给用户设备，包括：
所述接入网设备根据所述空间级数信息生成扰码序列；
所述接入网设备根据所述扰码序列对MIB进行加扰处理；
所述接入网设备通过PBCH发送加扰处理后的所述MIB。
在用户设备随机接入之前，根据空间级数信息生成扰码序列，根据扰码序列对MIB进行扰码处理，而用户设备通过对PBCH盲检得到MIB时，根据所使用的解码序列就能准确的得到空间级数信息，通过解扰码处理的过程就能实现空间级数信息的传输，减少了信令开销。
结合本申请第一方面第四实施方式，本申请第一方面第五实施方式中，所述接入网设备根据所述空间级数信息生成扰码序列，包括：
所述接入网设备根据所述空间级数信息确定对应的解扰码设计规则，并根据所述解扰码设计规则生成扰码序列，所述空间级数信息和所述解扰码设计规则的对应关系为所述接入网设备和所述用户设备所共知。
在用户设备随机接入之前，通信系统预设用户设备和接入网设备所共知的空间级数信息与解扰码设计规则的对应关系，使得空间级数信息不同的时，选择不同的解扰码设计规则生成扰码序列对MIB进行扰码处理，用户设备在盲检得到MIB时，根据所使用的解码序列就能确定解扰码设计规则，从而准确的得到与解扰码设计规则对应的空间级数信息。
结合本申请第一方面第一实施方式，本申请第一方面第六实施方式中，所述接入网设备将所述前导序列信息发送给用户设备，包括：
所述接入网设备将所述前导序列信息中的所述空间级数信息携带于SIB中；
所述接入网设备通过PDSCH发送所述SIB。
在用户设备随机接入之前，接入网设备向用户设备发送的系统消息中，系统信息分成MIB和多个SIB，SIB分为多种类型，一般时频资源信息是由SIB2中的字段来指示的，因此，可以将前导序列信息中的空间级数信息也通过SIB2中的字段来指示，从而实现SIB2中携带空间级数信息，通过PDSCH发送SIB2到用户设备，使得用户设备可以在收到SIB2后，通过对SIB2中字段的解析得到空间级数信息。
结合本申请第一方面第一实施方式、第一方面第二实施方式、第一方面第三实施方式、第一方面第四实施方式、第一方面第五实施方式或第一方面第六实施方式，本申请第一方面第七实施方式中，所述前导序列信息还包括时频资源信息，所述时频资源信息用于指示前导序列空间在PRACH所占用的时频资源，
所述接入网设备将所述前导序列信息发送给用户设备，还包括：
所述接入网设备将所述前导序列信息中的所述时频资源信息携带于SIB中；
所述接入网设备通过PDSCH发送所述SIB。
在用户设备随机接入之前，接入网设备向用户设备发送的系统消息中，系统信息分成MIB和多个SIB，SIB分为多种类型，由于一般时频资源信息是由SIB2中的字段来指示的，因此，为了不增加额外的工作量，将时频资源信息依然携带于SIB2中。
结合本申请第一方面、第一方面第一实施方式、第一方面第二实施方式、第一方面第三实施方式、第一方面第四实施方式、第一方面第五实施方式、第一方面第六实施方式或第一方面第七实施方式，本申请第一方面第八实施方式中，所述接入网设备确定前导序列信息之前，所述方法还包括：
所述接入网设备获取前导序列空间配置参数，所述前导序列空间配置参数包括网络负载、系统参数及用户设备数量。
接入网设备确定前导序列信息之前，需要获取前导序列空间配置参数，前导序列空间配置参数包括网络负载、系统参数及用户设备数量，系统参数包括用户序列长度、碰撞概率容忍值、漏检概率容忍值、定时估计误差、信道估计误差、误码率、可用时频资源大小、 可用计算资源大小、接收信号功率和信噪比中的至少一种，使得接入网设备可以根据前导序列空间配置参数确定前导序列信息。
本申请第二方面提供一种前导序列的配置方法，包括：
用户设备获取接入网设备发送的前导序列信息，所述前导序列信息包括用于指示前导序列的数量的消息；
所述用户设备根据所述前导序列信息进行随机接入。
在用户设备的随机接入过程中，用户设备需要在接入网设备指定数量的前导序列中选择出一个前导序列发送至接入网设备，在此之前，用户设备获取接入网设备发送的前导序列信息，前导序列信息包括用于指示前导序列的数量的消息，用户设备根据接收到的前导序列信息进行随机接入，使得用户设备可以顺利的随机接入通信网络系统，减少了随机接入失败的概率。
结合本申请第二方面，本申请第二方面第一实施方式中，所述前导序列信息还包括空间级数信息，所述空间级数信息用于指示前导序列空间的码域空间层数。
因为前导序列是跨时域、频域和码域的，那么可选前导序列空间在码域上是具有多层码域空间的，因此，接入网设备确定的前导序列信息中除了包括用于指示前导序列的数量的消息之外，还包括用于指示前导序列空间的码域空间层数的空间级数信息。
结合本申请第二方面第一实施方式，本申请第二方面第二实施方式中，所述用户设备获取接入网设备发送的前导序列信息，包括：
用户设备对PBCH进行盲检得到MIB，并根据盲检去除的CRC码确定空间级数信息。
由于接入网设备在空间级数信息不同的时候，产生不同的CRC码对MIB进行校验处理，用户设备通过对PBCH盲检得到MIB时，根据去除的CRC码就能准确的得到空间级数信息，通过校验过程就能实现空间级数信息的传输，减少了信令开销。
结合本申请第二方面第二实施方式，本申请第二方面第三实施方式中，所述用户设备对PBCH进行盲检得到MIB，并根据盲检去除的CRC码确定空间级数信息，包括：
用户设备对PBCH进行盲检得到MIB，并根据盲检去除的CRC码确定CRC设计规则，根据所述CRC设计规则得到对应的空间级数信息，所述空间级数信息和所述CRC设计规则的对应关系为所述接入网设备和所述用户设备所共知。
在用户设备随机接入之前，通信系统预设用户设备和接入网设备所共知的空间级数信息与CRC设计规则的对应关系，使得空间级数信息不同的时，选择不同的CRC设计规则生成CRC码，用户设备在盲检得到MIB时，根据去除的CRC码就能确定CRC设计规则，从而准确的得到与CRC设计规则对应的空间级数信息。
结合本申请第二方面第一实施方式，本申请第二方面第四实施方式中，所述用户设备获取接入网设备发送的前导序列信息，包括：
用户设备对PBCH进行盲检得到MIB，并根据盲检采用的解码序列确定空间级数信息。
由于接入网设备在空间级数信息不同的时候，产生不同的扰码序列对MIB进行扰码处理，用户设备通过对PBCH盲检得到MIB时，根据所使用的解码序列就能准确的得到空间级数信息，通过解扰码处理的过程就能实现空间级数信息的传输，减少了信令开销。
结合本申请第二方面第四实施方式，本申请第二方面第五实施方式中，所述用户设备对PBCH进行盲检得到MIB，并根据盲检采用的解码序列确定空间级数信息，包括：
用户设备对PBCH进行盲检得到MIB，并根据盲检采用的解码序列确定解扰码设计规则，根据所述解扰码设计规则得到对应的空间级数信息，所述空间级数信息和所述解扰码设计规则的对应关系为所述接入网设备和所述用户设备所共知。
在用户设备随机接入之前，通信系统预设用户设备和接入网设备所共知的空间级数信息与解扰码设计规则的对应关系，使得空间级数信息不同的时，选择不同的解扰码设计规则生成扰码序列对MIB进行扰码处理，用户设备在盲检得到MIB时，根据所使用的解码序列就能确定解扰码设计规则，从而准确的得到与解扰码设计规则对应的空间级数信息。
结合本申请第二方面第一实施方式，本申请第二方面第六实施方式中，所述用户设备获取接入网设备发送的前导序列信息，包括：
用户设备通过PDSCH接收接入网设备发送的SIB，所述SIB中携带前导序列信息中的空间级数信息；
所述用户设备解析所述SIB得到所述空间级数信息。
在用户设备随机接入之前，接入网设备向用户设备发送的系统消息中，系统信息分成MIB和多个SIB，SIB分为多种类型，一般时频资源信息是由SIB2中的字段来指示的，因此，可以将前导序列信息中的空间级数信息也通过SIB2中的字段来指示，从而实现SIB2中携带前导序列信息，用户设备通过PDSCH接收接入网设备发送的SIB2，通过从SIB2中解析得到空间级数信息。
结合本申请第二方面第一实施方式、第二方面第二实施方式、第二方面第三实施方式、第二方面第四实施方式、第二方面第五实施方式或第二方面第六实施方式，本申请第二方面第七实施方式中，所述前导序列信息还包括时频资源信息，所述时频资源信息用于指示前导序列空间在PRACH所占用的时频资源，
所述用户设备获取接入网设备发送的前导序列信息，还包括：
用户设备通过PDSCH接收接入网设备发送的SIB，所述SIB中携带前导序列信息中的时频资源信息；
所述用户设备解析所述SIB得到所述时频资源信息。
在用户设备RA之前，接入网设备向用户设备发送的系统消息中，系统信息分成MIB和多个SIB，SIB分为多种类型，由于一般时频资源信息是由SIB2中的字段来指示的，因此，为了不增加额外的工作量，将时频资源信息依然携带于SIB2中。
本申请第三方面提供一种接入网设备，包括：处理器和发射器，所述处理器和所述发射器相连接；
所述处理器，用于确定前导序列信息，所述前导序列信息包括用于指示前导序列的数量的消息；
所述发射器，用于将所述前导序列信息发送给用户设备，所述前导序列信息用于供用户设备进行随机接入。
在用户设备的随机接入过程中，用户设备需要在接入网设备指定数量的前导序列中选 择出一个前导序列发送至接入网设备，在此之前，处理器根据前导序列空间配置参数确定前导序列信息，前导序列信息包括用于指示前导序列的数量的消息，发射器将前导序列信息发送给用户设备，用户设备能够根据前导序列信息进行随机接入，使得用户设备可以顺利的随机接入通信网络系统，减少了随机接入失败的概率。
结合本申请第三方面，本申请第三方面第一实施方式中，所述前导序列信息还包括空间级数信息，所述空间级数信息用于指示前导序列空间的码域空间层数，
所述处理器，还用于根据所述空间级数信息生成CRC码；
所述处理器，还用于根据所述CRC码对MIB进行校验处理；
所述发射器，用于通过PBCH发送校验处理后的所述MIB。
前导序列信息包括空间级数信息，预设用户设备和接入网设备所共知的空间级数信息与CRC设计规则的对应关系，使得空间级数信息不同的时候，处理器产生不同的CRC码对MIB进行校验处理，发射器通过PBCH发送校验处理后的MIB，而用户设备通过对PBCH盲检得到MIB时，根据去除的CRC码就能准确的得到空间级数信息，通过校验过程就能实现空间级数信息的传输，减少了信令开销。
结合本申请第三方面，本申请第三方面第二实施方式中，所述前导序列信息还包括空间级数信息，所述空间级数信息用于指示前导序列空间的码域空间层数，
所述处理器，还用于根据所述空间级数信息生成扰码序列；
所述处理器，还用于根据所述扰码序列对MIB进行加扰处理；
所述发射器，用于通过PBCH发送加扰处理后的所述MIB。
前导序列信息包括空间级数信息，预设用户设备和接入网设备所共知的空间级数信息与解扰码设计规则的对应关系，使得空间级数信息不同的时候，处理器产生不同的扰码序列对MIB进行扰码处理，发射器通过PBCH发送校验处理后的MIB，而用户设备通过对PBCH盲检得到MIB时，根据所使用的解码序列就能准确的得到空间级数信息，通过解扰码处理的过程就能实现空间级数信息的传输，减少了信令开销。
结合本申请第三方面，本申请第三方面第三实施方式中，所述前导序列信息还包括空间级数信息，所述空间级数信息用于指示前导序列空间的码域空间层数，
所述发射器，用于将所述前导序列信息中的所述空间级数信息携带于SIB中；
所述发射器，用于通过PDSCH发送所述SIB。
在用户设备随机接入之前，接入网设备向用户设备发送的系统消息中，系统信息分成MIB和多个SIB，SIB分为多种类型，现有技术中时频资源信息是由SIB2中的字段来指示的，因此，发射器可以将前导序列信息中的空间级数信息也通过SIB2中的字段来指示，从而实现SIB2中携带空间级数信息，通过PDSCH发送SIB2到用户设备，使得用户设备可以在收到SIB2后，通过对SIB2中字段的解析得到空间级数信息。
结合本申请第三方面第一实施方式、第三方面第二实施方式或第三方面第三实施方式，本申请第三方面第四实施方式中，所述前导序列信息还包括时频资源信息，所述时频资源信息用于指示前导序列空间在PRACH所占用的时频资源，
所述处理器，还用于将所述前导序列信息中的所述时频资源信息携带于SIB中；
所述发射器，还用于通过PDSCH发送所述SIB。
在用户设备随机接入之前，接入网设备向用户设备发送的系统消息中，系统信息分成MIB和多个SIB，SIB分为多种类型，由于现有技术中时频资源信息是由SIB2中的字段来指示的，因此，为了不增加额外的工作量，处理器依然将时频资源信息依然携带于SIB2中，发射器通过PDSCH发送SIB2。
结合本申请第三方面、第三方面第一实施方式、第三方面第二实施方式、第三方面第三实施方式或第三方面第四实施方式，本申请第三方面第五实施方式中，所述接入网设备还包括：接收器；
所述接收器，具体用于获取前导序列空间配置参数，所述前导序列空间配置参数包括网络负载、系统参数及用户设备数量。
在处理器确定前导序列信息之前，接收器需要获取前导序列空间配置参数，前导序列空间配置参数包括网络负载、系统参数及用户设备数量，系统参数包括用户序列长度、碰撞概率容忍值、漏检概率容忍值、定时估计误差、信道估计误差、误码率、可用时频资源大小、可用计算资源大小、接收信号功率和信噪比中的至少一种，使得接收器可以根据前导序列空间配置参数确定前导序列信息。
本申请第四方面提供一种用户设备，包括：接收器及处理器，所述接收器和所述处理器相连接；
所述接收器，用于获取接入网设备发送的前导序列信息，所述前导序列信息包括用于指示前导序列的数量的消息；
所述处理器，用于根据所述前导序列信息进行随机接入。
在用户设备的随机接入过程中，用户设备需要在接入网设备指定数量的前导序列中选择出一个前导序列发送至接入网设备，在此之前，接收器获取接入网设备发送的前导序列信息，处理器根据前导序列信息进行随机接入，使得用户设备可以顺利的随机接入通信网络系统，减少了随机接入失败的概率。
结合本申请第四方面，本申请第四方面第一实施方式中，所述前导序列信息还包括空间级数信息，所述空间级数信息用于指示前导序列空间的码域空间层数，
所述接收器，具体用于对PBCH进行盲检得到主系统信息块MIB，并根据盲检去除的CRC码确定空间级数信息。
前导序列信息还包括空间级数信息，预设用户设备和接入网设备所共知的空间级数信息与CRC设计规则的对应关系，使得空间级数信息不同的时候，产生不同的CRC码对MIB进行校验处理，接收器通过对PBCH盲检得到MIB时，根据去除的CRC码就能准确的得到空间级数信息，通过校验过程就能实现空间级数信息的传输，减少了信令开销。
结合本申请第四方面，本申请第四方面第二实施方式中，所述前导序列信息还包括空间级数信息，所述空间级数信息用于指示前导序列空间的码域空间层数，
所述接收器，具体用于对PBCH进行盲检得到MIB，并根据盲检采用的解码序列确定空间级数信息。
前导序列信息还包括空间级数信息，预设了用户设备和接入网设备所共知的空间级数 信息与解扰码设计规则的对应关系，使得空间级数信息不同的时候，产生不同的扰码序列对MIB进行扰码处理，用户设备通过对PBCH盲检得到MIB时，根据所使用的解码序列就能准确的得到空间级数信息，通过解扰码处理的过程就能实现空间级数信息的传输，减少了信令开销。
结合本申请第四方面，本申请第四方面第三实施方式中，所述前导序列信息还包括空间级数信息，所述空间级数信息用于指示前导序列空间的码域空间层数，
所述接收器，用于通过物理下行共享信道PDSCH接收接入网设备发送的系统信息块SIB，所述SIB中携带前导序列信息中的空间级数信息；
所述接收器，还用于解析所述SIB得到所述空间级数信息。
在用户设备随机接入之前，接入网设备向用户设备发送的系统消息中，系统信息分成MIB和多个SIB，SIB分为多种类型，一般时频资源信息是由SIB2中的字段来指示的，因此，可以将前导序列信息中的空间级数信息也通过SIB2中的字段来指示，从而实现SIB2中携带前导序列信息，接收器通过PDSCH接收接入网设备发送的SIB2，通过从SIB2中解析得到空间级数信息。
结合本申请第四方面第一实施方式、第四方面第二实施方式或第四方面第三实施方式，本申请第四方面第四实施方式中，所述前导序列信息还包括时频资源信息，所述时频资源信息用于指示前导序列空间在PRACH所占用的时频资源，
所述接收器，还用于通过PDSCH接收接入网设备发送的SIB，所述SIB中携带前导序列信息中的时频资源信息；
所述接收器，还用于解析所述SIB得到所述时频资源信息。
在用户设备随机接入之前，接入网设备向用户设备发送的系统消息中，系统信息分成MIB和多个SIB，SIB分为多种类型，一般时频资源信息是由SIB2中的字段来指示的，因此，为了不增加额外的工作量，将时频资源信息依然携带于SIB2中，接收器通过PDSCH接收接入网设备发送的SIB2，解析SIB2就可以得到时频资源信息。
附图说明
为了更清楚地说明本申请实施例技术方案，下面将对实施例和现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1为一种用户设备随机接入的信令流程示意图；
图2为本申请提供的应用场景或构架示意图；
图3为本申请提供的前导序列的配置方法的一个实施例的流程示意图；
图4为本申请提供的前导序列的配置方法的另一个实施例的流程示意图；
图5为一种MIB处理的流程示意图；
图6为本申请提供的前导序列的配置方法的又一个实施例的流程示意图；
图7为一种PBCH CRC码设计规则的示意图；
图8为本申请提供的前导序列的配置方法的又一个实施例的流程示意图；
图9为本申请接入网设备的一个实施例的结构示意图；
图10为本申请接入网设备的另一个实施例的结构示意图；
图11为本申请用户设备的一个实施例的结构示意图；
图12为本申请用户设备的另一个实施例的结构示意图。
具体实施方式
本申请提供了前导序列的配置方法、用户设备及接入网设备，用于通过接入网设备确定前导序列信息并通知用户设备，用户设备根据前导序列信息确定可选前导序列空间，使得用户设备可以随机接入通信网络系统。
下面将结合本申请中的附图，对本申请中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
首先简单介绍本申请应用的系统构架或场景。
本申请应用于无线通信网络系统，可以应用于LTE系统，如图2所示，N个用户设备通过接入网设备接入核心网，用户设备可以与接入网设备无线连接。接入网设备可以是小区的网络设备，可以是小区层面意义上的基站或者具有类似于基站的功能的网络设备，例如无线路由器和无线接入点(Access Point，AP)等。接入网设备可以是为小区内移动或固定不动的用户设备提供无线接入、通信服务的网络设备。接入网设备服务的所有用户设备包括接入了接入网设备的用户设备和驻留在接入网设备提供的网络的用户设备等。
在用户设备UE与接入网设备通信之前，需要先进行RA，并且RA之前，LTE系统需要指定PRACH上的可选前导序列空间，以供RA过程中UE从可选前导序列空间中选择承载前导序列的前导序列空间，从而能够顺利的向eNB发送前导序列，并且前导序列是跨时域、频域和码域的，可选前导序列空间具有时频资源和码域空间。
用于解决多个UE之间的RA冲突的资源由PRACH时频资源和前导序列共同构成。在LTE中，PRACH与物理上行分享信道(Physical Uplink Shared Channel，PUSCH)和物理上行控制信道(Physical Uplink Control Channel，PUCCH)在时频域上复用，PRACH的时频资源半静态地分布在PUSCH范围之内，且周期重复。PRACH的资源配置决定了用于RA和数据传输的资源分配。分配给PRACH的时频资源越多，则用于数据传输的时频资源就越少。前导序列可以区分同一PRACH时频资源上的不同UE。如果存在多于1个UE在同一PRACH时频资源上传输相同的前导序列，则会发生随机接入冲突，导致随机接入失败。LTE的前导序列由ZC序列的循环移位得到。一个LTE小区有64个前导序列，部分用于非竞争RA，用于竞争RA的前导序列将少于64个。当UE数量增多时，尤其是在IoT的海量MTC中，UE的基数非常大，假定所有前导序列皆用于竞争RA，但64个前导序列相对于UE的数量仍然是很少的，因此RA冲突的概率会增加。为了减小RA的冲突概率，原本由时频资源来划分前导序列的情形，可以在不增加时频资源占用率的基础上，增加码 域上的划分，即新的前导序列是跨时域、频域及码域的，假定每层的前导序列的个数为64个，当码域空间为1层的时候，前导序列的个数为64个；码域空间为2层时，前导序列的个数可以为128个；码域空间为4层时，前导序列的个数为256个。码域空间每增加1个层数，前导序列的可用个数就增加64个。
在现有的长期演进(Long Term Evolution，LTE)标准协议中，在UE发送前导序列之前，需要接入网设备在广播信道(Broadcast Channel，BCH)中发送的系统信息块(System Information Block，SIB)2，UE通过SIB2获取的系统信息包括：RA信道参数、小区的前导序列格式、ZC(Zadoff-Chu)根序列的数量和序列编号、前导序列和隐性信息、隐性信息之间的对应关系、功率递增的补偿(大于等于0dB)及前导序列的最大重传次数。
UE通过接收系统信息块SIB2来获得前导序列信息。接入网设备所对应的小区可用的PRACH时频资源是由SIB2的prach-ConfigIndex和prach-FrequencyOffset字段决定的。一旦这两个字段确定了，对接入该小区的所有UE而言，前导序列的格式(format)和可选的PRACH资源就固定了。SIB2中的PRACH配置信息如下所示：
radioResourceConfigCommon：prach-Config
rootSequenceIndex:0x7％用于生成Signature的逻辑Za-doff序列索引，每一个逻辑索引对应一个物理ZC序列。该值一般是按网络规划配置设置的。当前参数设置为7，对应物理ZC序列为629。
prach-ConfigInfo
prach-ConfigIndex:0x6％该值与前导序列格式一同确定前导序列频域/时域资源。当前参数设置为6，对应前导序列格式0，可占用任意系统帧的第1或6子帧资源。
highSpeedFlag:FALSE％高速移动小区指示。即是否是覆盖高速移动场景，当前参数设置为False，表示非覆盖高速移动场景。
zeroCorrelationZoneConfig:0x2％零自相关区配置索引。随机接入前导序列是由具有恒幅零自相关(CAZAC)的ZC序列生成的，通过逻辑根序列获取物理根序列，然后对物理根序列进行循环移位获得。零自相关区配置索引与Ncs的选择直接相关。取值范围0～15，当前参数设置为2，即对应Ncs＝15(无限集)或Ncs＝22(有限集)。
prach-FreqOffset:0x6％频分双工(Frequency Division Duplexing，FDD)小区的每个PRACH所占用的频域资源起始位置的偏置值。
UE发起随机接入时，根据可能的RA过程消息的大小以及路径损耗(pathloss)等，选择合适的前导序列。SIB2主要有三部分内容，包括公共无线资源配置信息、定时器与常量及频率信息。除此之外还包含小区接入禁止相关信息。现有SIB2RACH配置信息情况如下：
radioResourceConfigCommon:rach-ConfigCommon
preambleInfo
numberofRA-Preambles:n52％保留给竞争模式使用的RA前导序列个数，PRACH的前导序列共有64。当前参数设置52，表示52个前导序列用于竞争模式RA。
preambleGroupAConfig
sizeofRA-PreamblesGroupA:n28％A组RA前导序列个数。基于竞争模式的RA前导序列共分2组，A组和B组。当前参数设置28，A组中有28个前导序列，B组中52-28＝24个前导序列。
messageSizeGroupA:b56％随机接入过程中UE选择A组前导序列时，判断Msg3的大小的门限值/bit。当前参数设置56，即Msg3小于56bit时，选择A组。
messagePowerOffsetGroupB:dB10％用于UERA前导序列B组的选择。默认为10dB。
powerRampingParameters
powerRampingStep:dB2％RA过程前导序列功率攀升步长。当前参数设置dB2，即2dB。
preambleInitialReceivedTargetPower:dBm-104％前导序列初始接收功率目标。当PRACH前导格式为0时，在满足前导检测性能时，eNB所期望的目标功率水平。当前参数设置-104dBm，即期望的功率值，用于计算前导序列的初始发射功率。
ra-SupervisionInfo
preambleTransMax:n10％RA前导序列最大重发次数。当前参数设置10，即最大重发10次。
ra-ResponseWindowSize:sf10％随机响应接收窗口。若在窗口期未收到RAR，则上行同步失败，当前参数设置sf10，即10个子帧长度。
mac-ContensionResolutionTimer:sf64％RA过程中UE等待接收Msg4的有效时长。当UE初传或重传Msg3时启动。在超时前UE收到Msg4或Msg3的NACK反馈，则定时器停止。定时器超时，则RA失败，UE重新进行RA。当前参数设置sf64，即64个子帧长度。
maxHARQ-Msg3Tx:0x5％Msg3的混合自动重传请求(Hybrid Automatic Repeat reQuest，HARQ)最大传输次数。当前参数设置5，即5次。
由上可见，UE是通过接收系统信息块SIB2来获得前导序列信息的，eNB所对应的小区可用的PRACH时频资源(即可选前导序列空间)是由SIB2中的prach-ConfigIndex和prach-FrequencyOffset字段决定的，可知，LTE系统的还没有任何手段来告知UE前导序列信息，因此，UE也无法发送跨时域、频域和码域的前导序列。
下面通过实施例对在上述系统构架或场景中接入网设备和用户设备之间的交互的前导序列的配置方法进行说明。
请参阅图3，本申请实施例提供一种前导序列的配置方法，包括：
301、接入网设备确定前导序列信息。
本实施例中，在用户设备接入接入网设备之前，需要先进行RA，并且RA之前，接入网设备根据前导序列空间配置参数确定前导序列信息，前导序列信息包括用于指示前导序列的数量的消息。
302、接入网设备将前导序列信息发送给用户设备，用户设备接收前导序列信息。
本实施例中，接入网设备在确定前导序列信息之后，用户设备并不知道前导序列信息， 在RA过程中将无法发送前导序列，因此，接入网设备需要通过PBCH或PDSCH等信道将前导序列信息发送给用户设备，用户设备通过PBCH或PDSCH等信道获取接入网设备发送的前导序列信息。
303、用户设备根据前导序列信息进行随机接入。
本实施例中，用户设备根据接收到的前导序列信息，可以从指定数量的前导序列中选择一个前导序列发送至接入网设备进行随机接入。
本申请实施例中，在用户设备的随机接入过程中，用户设备需要在接入网设备指定数量的前导序列中选择出一个前导序列发送至接入网设备，在此之前，接入网设备根据前导序列空间配置参数确定前导序列信息，前导序列信息包括用于指示前导序列的数量的消息，将前导序列信息发送给用户设备，使得用户设备能够根据前导序列信息进行随机接入，使得用户设备可以顺利的随机接入通信网络系统，减少了随机接入失败的概率。
上述实施例中，前导序列信息中包含用于指示前导序列的数量的消息。前导序列信息还包含空间级数信息，空间级数信息用于指示前导序列空间的码域空间层数。而根据上述系统构架或场景中的介绍中可以得知，现有技术中的前导序列信息中的时频资源信息是通过SIB2传输的，那么，空间级数信息可以包含在SIB2中显式发送给用户设备，也可以通过隐式的方式告知用户设备，具体不做限定。
下面将通过实施例分别对空间级数信息的显式和隐式的传递进行说明。
在具体实施时，显式方式传递可以通过在SIB2中增加信令的方式，请参阅图4，本申请实施例提供一种前导序列的配置方法，包括：
401、接入网设备获取前导序列空间配置参数。
本实施例中，接入网设备在确定前导序列空间之前，需要知道前导序列空间的大小，即前导序列空间的前导序列的数量，那么就需要获取前导序列空间配置参数。具体的，接入网设备可以在一定的周期内统计前导序列空间配置参数，前导序列空间配置参数包括网络负载、系统参数及用户设备数量，还可以包括接入用户数量、系统性能参数和前导序列长度等参数。可选地，该周期可以为广播周期。
402、接入网设备确定前导序列信息。
详情可以参考步骤301，其中，前导序列信息中还包括空间级数信息。
403、接入网设备将前导序列信息中的空间级数信息携带于SIB中。
本实施例中，接入网设备在确定前导序列信息之后，用户设备并不知道前导序列信息，在RA过程中将无法发送前导序列，因此，接入网设备需要将前导序列信息告知用户设备，在现有的技术中前导序列空间的时频资源信息是由SIB2中的prach-ConfigIndex和prach-FrequencyOffset字段来指示的，因此，将时频资源信息用SIB2中的prach-ConfigIndex和prach-FrequencyOffset字段来表示，在SIB2中增加一个字段用来表示空间级数信息(即码域空间层数)，本实施例中SIB2RACH配置信息情况如下：
radioResourceConfigCommon:rach-ConfigCommon
preambleInfo
numberofRA-PreamblesCode:nxx％xx＝1,2,3,…，N码域空间层数
numberofRA-Preambles:n52％保留给竞争模式使用的随机接入前导序列个数，PRACH前导序列共有64。
preambleGroupAConfig
sizeofRA-PreamblesGroupA:n28％组A随机接入前导序列个数。
messageSizeGroupA:b56％随机接入过程中UE选择A组前导时判断msg3大小的门限值/bit。
messagePowerOffsetGroupB:dB10％用于UE随机接入Preamble B组的选择。
powerRampingParameters
powerRampingStep:dB2％随机接入过程前导序列功率攀升步长。当前参数设置dB2，即2dB。
preambleInitialReceivedTargetPower:dBm-104％前导序列初始接收功率目标。
ra-SupervisionInfo
preambleTransMax:n10％随机接入前导序列最大重发次数。
ra-ResponseWindowSize:sf10％随机响应接收窗口。
mac-ContensionResolutionTimer:sf64％RA过程中UE等待接收Msg4的有效时长。
maxHARQ-Msg3Tx:0x5％Msg3的HARQ最大传输次数，当前参数设置5，即5次。
其中，第三行“numberofRA-PreamblesCode:nxx”用于指示码域空间层数，n表示十进制，xx表示具体空间层数，该空间级数用十进制表示，在指示时不涉及编码。当xx＝1时，用二进制表示为00，对应的就是第0级空间，假定每级空间可选的前导序列为64个，那么00对应的可选前导序列为64个。当xx＝2时，二进制表示为01，对应的可选前导序列为64*2＝128个，以此类推，当xx＝4时，二进制表示为11，对应的可选前导序列为64*4＝256个。
需要说明的是，在SIB2中增加一个字段用来表示空间级数信息只是本申请的一种方案，也可以将前导序列信息携带于其他类型的SIB中，具体不做限定。
404、接入网设备通过PDSCH发送SIB，用户设备通过PDSCH接收SIB。
本实施例中，接入网设备将空间级数信息携带于SIB2中之后，通过PDSCH发送SIB2，用户设备通过PDSCH接收接入网设备发送的SIB，从SIB中得到SIB2。
405、用户设备解析SIB得到空间级数信息。
本实施例中，用户设备对SIB2中的字段进行解析，得到前导序列信息。
406、用户设备根据前导序列信息进行随机接入。
详情可以参考步骤303。
本申请实施例中，接入网设备可以将前导序列信息中的空间级数信息通过SIB2中的字段来指示，从而实现SIB2中携带前导序列信息，通过PDSCH发送SIB2到用户设备，使得用户设备可以在收到SIB中的SIB2后，通过对SIB2中字段的解析，简单快捷的得到前导序列信息。
上述实施例中，接入网设备通过在SIB中携带空间级数信息通知用户设备的方式，虽然使得用户设备可以简单快捷的得到空间级数信息，但是同时增加了信令开销，因为在SIB2 中增加了一条字段用来表示空间级数信息，如果想要在不增加信令开销的情况传输空间级数信息，就只能考虑在系统信息中的MIB处理过程中实现信息传递，如图5所示，为接入网设备发送MIB之前的处理步骤，具体的：
步骤501：在LTE系统中，接入网设备是通过PBCH向用户设备传输系统需要的基本信息，而这些基本信息是包含于MIB中的，因此接入网设备需要生成MIB，由于是现有技术，不做过多的说明，MIB包括有限个最重要、最常用的传输参数；
步骤502：采用预设的CRC码对MIB进行校验处理，即在MIB的后面添加CRC码，用于保证MIB在传输过程中的数据的正确，用户设备必须在盲检时准确的去除掉CRC码才能获得MIB；
步骤503：在LTE系统中，一般采用1:3卷积的方式对MIB进行处理，即编码前比特数/编码后比特数为1/3，目的是为了增加冗余比特，提高校验性能；
步骤504：根据实际情况中的PBCH的承载能力，必须对MIB的发送速率进行调节，使得与PBCH的承载能力向匹配；
步骤505：采用预设的扰码序列对MIB进行加扰处理，起到加密的作用，用户设备通过相应的解码序列才能得到MIB。
步骤506：采用正交相移键控(Quadrature Phase Shift Keyin，QPSK)调制方式对MIB进行数字调制；
步骤507、将QPSK调制之后的MIB放置于PBCH中对应的时频资源位置；
步骤508、最后形成正交频分复用符号(Orthogonal Frequency Division Multiplexing，OFDM)，即MIB是包含于OFDM符号中发送的。
分析以上的步骤可以看出，由于步骤502和步骤505中所使用的CRC码和解/扰码序列都是可以人为改变的，可以用于隐式的传输空间级数信息。
下面将分别对使用CRC码和解/扰码序列来传输空间级数信息，进行详细的说明。
(一)、使用CRC码传输空间级数信息；
请参阅图6，本申请实施例提供一种前导序列的配置方法，包括：
601、接入网设备获取前导序列空间配置参数。
详情可以参考步骤401。
602、接入网设备确定前导序列信息。
详情可以参考步骤402，其中，前导序列信息中还包括时频资源信息。
603、接入网设备将前导序列信息中的时频资源信息携带于SIB中。
本实施例中，在现有的技术中前导序列空间的时频资源信息是由SIB2中的prach-ConfigIndex和prach-FrequencyOffset字段来指示的，因此，将时频资源信息用SIB2中的prach-ConfigIndex和prach-FrequencyOffset字段来表示，按照现有方式可以减少接入网设备的额外工作量。
604、接入网设备根据空间级数信息生成CRC码。
本实施例中，现有的CRC码如图7所示，主要有三种，分别对应1、2和4个天线端口，在制定CRC设计规则的时候，CRC码最好仍然是16位的，这样有助于后面信道编码 及速率匹配操作，但是不限定于16位，CRC设计规则与空间级数信息必须是具有对应关系的，并且对应关系是用户设备和接入网设备共知的。例如，空间级数信息指示的码域空间层数为4层，对应CRC设计规则生成的CRC码是(0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1)；码域空间层数为3层，对应的CRC码是(0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0)。CRC码的具体表现形式可以有多种变异形式，16位的CRC码所有的可能性有种，因此在CRC设计规则可以从种方式中挑选，接入网设备根据空间级数信息确定对应关系的CRC设计规则，并根据CRC设计规则生成CRC码。
605、接入网设备根据CRC码对MIB进行校验处理。
本实施例中，接入网设备对MIB进行校验处理，将CRC码添加到MIB后面。
606、接入网设备通过PBCH发送校验处理后的MIB，用户设备对PBCH进行盲检得到MIB。
本实施例中，接入网设备对校验处理后的MIB进行上述步骤503到步骤508的处理，将MIB包含于OFDM符号中，通过PBCH发送OFDM符号，用户设备对PBCH中的OFDM符号进行盲检得到MIB。
607、用户设备根据盲检去除的CRC码确定空间级数信息。
本实施例中，由于CRC设计规则与空间级数信息必须是具有对应关系的，并且对应关系是用户设备和接入网设备共知的，那么用户设备对PBCH中的OFDM符号进行盲检得到MIB时，根据去除的CRC码可以确定对应的CRC设计规则，根据CRC设计规则和空间级数信息的对应关系，能够得到空间级数信息。
608、接入网设备通过PDSCH发送SIB，用户设备通过PDSCH接收接入网设备发送的SIB。
本实施例中，接入网设备通过PDSCH发送SIB，SIB中包含SIB2，用户设备通过PDSCH接收到接入网设备发送的SIB。
609、用户设备解析SIB得到时频资源信息。
本实施例中，用户设备接收到SIB之后，对SIB中的SIB2进行解析，得到时频资源信息。
610、用户设备根据前导序列信息进行随机接入。
详情可以参考步骤303。
本申请实施例中，由于现有技术中时频资源信息是由SIB2中的字段来指示的，因此，时频资源信息依然携带于SIB2中，并且预设了用户设备和接入网设备所共知的空间级数信息与CRC设计规则的对应关系，使得空间级数信息不同的时候，产生不同的CRC码对MIB进行校验处理，而用户设备通过对PBCH盲检得到MIB时，根据去除的CRC码就能准确的得到空间级数信息，通过校验过程就能实现空间级数信息的传输，减少了信令开销。
需要说明的是，步骤606与步骤608的先后顺序不做限定，但是步骤607必须处于步骤606之后，步骤609必须处于步骤608之后。
(二)、使用解/扰码序列传输空间级数信息。
请参阅图8，本申请实施例中一种前导序列的配置方法，包括：
801、接入网设备获取前导序列空间配置参数。
详情可以参考步骤601。
802、接入网设备确定前导序列信息。
详情可以参考步骤602。
803、接入网设备将前导序列信息中的时频资源信息携带于SIB中。
详情可以参考步骤603。
804、接入网设备根据空间级数信息生成扰码序列；
本实施例中，现有的LTE中，扰码是根据小区ID作为初始值生成阶数为31阶的Gold码，具有不同的码相位的序列作为扰码序列，码相位有4种(0、1、2和3)，对应40ms中的4段，原有的4种码相位对应的是第0级码域空间，在制定解扰码设计规则时，生成的扰码序列的码相位不仅用来对应40ms的PBCH发送周期，也对应空间级数信息，码相位设计方案与空间级数信息的对应关系如表1所示，
表1
初始码相位 0,1,2,3 第0级空间，可选前导序列个数64
码相位设计1 4,5,6,7 第0和1级空间，可选前导序列个数128
码相位设计2 8,9,10,11 第0、1和2级空间，可选前导序列个数192
码相位设计3 12,13,14,15 第0、1、2和3级空间，可选前导序列个数256
…… …… ……
其中初始码相位方案所表示的是，现有技术的扰码序列的初始码相位有4种(0、1、2和3)对应的空间级数信息是具有第0级空间(即只有1个码域空间层数)；码相位设计1所述表示的是，本申请扰码序列的码相位具有4种(4、5、6和7)，这4种码相位对应的空间级数信息是具有第0和1级空间(即具有2个码域空间层数)，同理，码相位设计2和3所要表示的是空间级数信息为具有3个和4个码域空间层数，码相位设计方案即是解扰码设计规则；
如表2所示，是另一种码相位设计的方式，与表1中的码相位设计的方式的共同点为：都是通过在一个PBCH的发送周期40ms中，设计具有4种不同的码相位的扰码序列，来表示不同的空间级数信息；
接入网设备根据空间级数信息指示的码域空间层数确定对应的码相位设计方案，码相位设计方案即解扰码设计规则，根据解扰码设计规则生成具有4种不同码相位的扰码序列，并且解扰码设计规则是用户设备和接入网设备所共知。
除了上述两种码相位设计的方式的解扰码设计规则之外，还可以使用其他码相位设计的方式，具体不做限定。
表2
初始码相位 0,1,2,3 第0级空间，可选前导序列个数64
码相位设计1 0,2,4,6 第0和1级空间，可选前导序列个数128
码相位设计2 0,3,6,9 第0、1和2级空间，可选前导序列个数192
码相位设计3 0,4,8,12 第0、1、2和3级空间，可选前导序列个数256
…… …… ……
805、接入网设备根据扰码序列对MIB进行扰码处理；
本实施例中，接入网设备根据生成的扰码序列对MIB进行扰码处理，根据扰码序列进行扰码处理的过程与现有技术相同，此处不做具体的说明。
806、接入网设备通过PBCH发送扰码处理后的MIB，用户设备对PBCH进行盲检得到MIB。
本实施例中，接入网设备对扰码处理后的MIB进行步骤506到步骤508的处理，将扰码处理后的MIB包含于OFDM符号中，通过PBCH发送OFDM符号，用户设备对PBCH中的OFDM符号进行盲检得到MIB。
807、用户设备根据盲检采用的解码序列确定空间级数信息。
本实施例中，由于解扰码设计规则与空间级数信息必须是具有对应关系的，并且对应关系是用户设备和接入网设备共知的，那么用户设备对PBCH中的OFDM符号进行盲检得到MIB时，根据盲检过程中采用的解码序列(与步骤804中的扰码序列对应)，可以确定对应的解扰码设计规则，根据解扰码设计规则和空间级数信息的对应关系，能够得到空间级数信息。
808、接入网设备通过PDSCH发送SIB，用户设备通过PDSCH接收接入网设备发送的SIB。
详情可以参考步骤608。
809、用户设备解析SIB得到时频资源信息；
详情可以参考步骤609。
810、用户设备根据前导序列信息进行随机接入。
详情可以参考步骤303。
本申请实施例中，由于现有技术中时频资源信息是由SIB2中的字段来指示的，因此，时频资源信息依然携带于SIB2中，并且预设了用户设备和接入网设备所共知的空间级数信息与解扰码设计规则的对应关系，使得空间级数信息不同的时候，产生不同的扰码序列对MIB进行扰码处理，而用户设备通过对PBCH盲检得到MIB时，根据盲检所使用的解码序列就能准确的得到空间级数信息，通过解扰码过程就能实现空间级数信息的传输，减少了信令开销。
需要说明的是，步骤806与步骤808的先后顺序不做限定，但是步骤707必须处于步骤806之后，步骤809必须处于步骤808之后。
需要说明的是，上述(1)和(2)中分别使用CRC码和解/扰码序列来传输空间级数信息，在具体实施的过程中，也可以同时使用CRC码和解/扰码序列来传输空间级数信息，即CRC设计规则和解扰码设计规则与空间级数信息具有对应关系，例如，空间级数信息为具有第0、1和2级空间(3层)，生成的CRC码是(1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1)，扰码序列的4种码相位为(0,1,3,5)，用户终端盲检的时候，根据去除的CRC码和解码序列就能 得到对应的空间级数信息。
上述实施例对前导序列的配置方法进行了说明，以下实施例对接入网设备和用户设备分别进行说明。
请参阅图9，本申请实施例提供一种接入网设备，包括：
处理器901，用于确定前导序列信息，前导序列信息包括用于指示前导序列的数量的消息；
发射器902，用于将前导序列信息发送给用户设备，前导序列信息用于供用户设备进行随机接入。
本申请实施例中，处理器901根据前导序列空间配置参数确定前导序列信息，前导序列信息包括用于指示前导序列的数量的消息，发射器902将前导序列信息发送给用户设备，使得用户设备能够根据前导序列信息进行随机接入，使得用户设备可以顺利的随机接入通信网络系统，减少了随机接入失败的概率。
可选的，本申请的一些实施例中，前导序列信息还包括空间级数信息，空间级数信息用于指示前导序列空间的码域空间层数，
处理器901，还用于根据空间级数信息生成CRC码；
处理器901，还用于根据CRC码对MIB进行校验处理；
发射器902，用于通过PBCH发送校验处理后的MIB。
本申请实施例中，前导序列信息包括空间级数信息，预设用户设备和接入网设备所共知的空间级数信息与CRC设计规则的对应关系，使得空间级数信息不同的时候，处理器901产生不同的CRC码对MIB进行校验处理，发射器902通过PBCH发送校验处理后的MIB，而用户设备通过对PBCH盲检得到MIB时，根据去除的CRC码就能准确的得到空间级数信息，通过校验过程就能实现空间级数信息的传输，减少了信令开销。
可选的，本申请的一些实施例中，前导序列信息还包括空间级数信息，空间级数信息用于指示前导序列空间的码域空间层数，
处理器901，还用于根据空间级数信息生成扰码序列；
处理器901，还用于根据扰码序列对MIB进行加扰处理；
发射器902，用于通过PBCH发送加扰处理后的MIB。
本申请实施例中，前导序列信息包括空间级数信息，预设用户设备和接入网设备所共知的空间级数信息与解扰码设计规则的对应关系，使得空间级数信息不同的时候，处理器901产生不同的扰码序列对MIB进行扰码处理，发射器902通过PBCH发送校验处理后的MIB，而用户设备通过对PBCH盲检得到MIB时，根据所使用的解码序列就能准确的得到空间级数信息，通过解扰码处理的过程就能实现空间级数信息的传输，减少了信令开销。
可选的，本申请的一些实施例中，前导序列信息还包括空间级数信息，空间级数信息用于指示前导序列空间的码域空间层数，
发射器902，用于将前导序列信息中的空间级数信息携带于SIB中；
发射器902，用于通过PDSCH发送SIB。
本申请实施例中，在用户设备RA之前，接入网设备向用户设备发送的系统消息中，系统信息分成MIB和多个SIB，SIB分为多种类型，现有技术中时频资源信息是由SIB2中的字段来指示的，因此，发射器902可以将前导序列信息中的空间级数信息也通过SIB2中的字段来指示，从而实现SIB2中携带空间级数信息，通过PDSCH发送SIB2到用户设备，使得用户设备可以在收到SIB2后，通过对SIB2中字段的解析得到空间级数信息。
可选的，本申请的一些实施例中，前导序列信息包括时频资源信息，时频资源信息用于指示前导序列空间在PRACH所占用的时频资源，
处理器901，用于将前导序列信息中的时频资源信息携带于SIB中；
发射器902，用于通过PDSCH发送SIB。
本申请实施例中，在用户设备RA之前，接入网设备向用户设备发送的系统消息中，系统信息分成MIB和多个SIB，SIB分为多种类型，由于现有技术中时频资源信息是由SIB2中的字段来指示的，因此，为了不增加额外的工作量，处理器901依然将时频资源信息依然携带于SIB2中，发射器902通过PDSCH发送SIB2。
可选的，本申请的一些实施例中，接入网设备还包括：接收器903；
接收器903，具体用于获取前导序列空间配置参数，前导序列空间配置参数包括网络负载、系统参数及用户设备数量。
应注意，如图10所示，接入网设备1000可以包括处理器1001、发射器1002、接收器1003及存储器1004。其中，存储器1004可以用于存储处理器1001执行的代码等。
接入网设备1000中的各个组件通过总线系统1005耦合在一起，其中总线系统1005除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。
图9所示的接入网设备900或图10所示的接入网设备1000能够实现前述前导序列的配置方法的实施例中所实现的接入网设备侧各个过程，为避免重复，这里不再赘述。
应注意，本申请上述方法实施例可以应用于处理器中，或者由处理器实现。处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读 存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(souble sata rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
请参阅图11，本申请实施例提供一种用户设备，包括：
接收器1101，用于获取接入网设备发送的前导序列信息，前导序列信息包括用于指示前导序列的数量的消息；
处理器1102，用于根据前导序列信息进行随机接入。
本申请实施例中，在用户设备随机接入之前，接收器1101获取接入网设备发送的前导序列信息，前导序列信息包括用于指示前导序列的数量的消息，处理器1102根据前导序列信息进行随机接入，使得用户设备可以顺利的随机接入通信网络系统，减少了随机接入失败的概率。
可选的，本申请的一些实施例中，前导序列信息还包括空间级数信息，空间级数信息用于指示前导序列空间的码域空间层数，
接收器1101，具体用于对PBCH进行盲检得到MIB，并根据盲检去除的CRC码确定空间级数信息。
本申请实施例中，前导序列信息还包括空间级数信息，预设用户设备和接入网设备所共知的空间级数信息与CRC设计规则的对应关系，使得空间级数信息不同的时候，产生不同的CRC码对MIB进行校验处理，接收器1101通过对PBCH盲检得到MIB时，根据去除的CRC码就能准确的得到空间级数信息，通过校验过程就能实现空间级数信息的传输，减少了信令开销。
可选的，本申请的一些实施例中，前导序列信息还包括空间级数信息，空间级数信息用于指示前导序列空间的码域空间层数，
接收器1101，具体用于对PBCH进行盲检得到MIB，并根据盲检采用的解码序列确定空间级数信息。
本申请实施例中，前导序列信息还包括空间级数信息，预设了用户设备和接入网设备所共知的空间级数信息与解扰码设计规则的对应关系，使得空间级数信息不同的时候，产生不同的扰码序列对MIB进行扰码处理，接收器1101通过对PBCH盲检得到MIB时，根据所使用的解码序列就能准确的得到空间级数信息，通过解扰码处理的过程就能实现空间级数信息的传输，减少了信令开销。
可选的，本申请的一些实施例中，前导序列信息包括空间级数信息，空间级数信息用于指示前导序列空间的码域空间层数，
接收器1101，用于通过PDSCH接收接入网设备发送的SIB，SIB中携带前导序列信息中的空间级数信息；
接收器1101，还用于解析SIB得到空间级数信息。
本申请实施例中，在用户设备RA之前，接入网设备向用户设备发送的系统消息中，系统信息分成MIB和多个SIB，SIB分为多种类型，现有技术中时频资源信息是由SIB2中的字段来指示的，因此，可以将前导序列信息中的空间级数信息也通过SIB2中的字段来指示，从而实现SIB2中携带前导序列信息，接收器1101通过PDSCH接收接入网设备发送的SIB2，通过从SIB2解析得到空间级数信息和时频资源信息，可以简单快捷的得到前导序列信息。
可选的，本申请的一些实例中，前导序列信息还包括时频资源信息，时频资源信息用于指示前导序列空间在PRACH所占用的时频资源，
接收器1101，用于通过PDSCH接收接入网设备发送的SIB，SIB中携带前导序列信息中的时频资源信息；
接收器1101，还用于解析SIB得到时频资源信息。
本申请实施例中，在用户设备RA之前，接入网设备向用户设备发送的系统消息中，系统信息分成MIB和多个SIB，SIB分为多种类型，由于现有技术中时频资源信息是由SIB2中的字段来指示的，因此，为了不增加额外的工作量，将时频资源信息依然携带于SIB2中，接收器1101通过PDSCH接收接入网设备发送的SIB2，解析就可以得到时频资源信息。
应注意，如图12所示，用户设备1200可以包括处理器1202、接收器1201、存储器1203、显示器1204、扬声器1205、发射器1206及输入装置1207等。其中，存储器1203可以用于存储处理器1202执行的代码等。
用户设备1200中的各个组件通过总线系统1208耦合在一起，其中总线系统1204除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。
图11所示的接入网设备1100或图12所示的接入网设备1200能够实现前述前导序列空间配置方法的实施例中所实现的用户设备侧各个过程，为避免重复，这里不再赘述。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
以上所述，以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (22)

  1. 一种前导序列的配置方法，其特征在于，包括：
    接入网设备确定前导序列信息，所述前导序列信息包括用于指示前导序列的数量的消息；
    所述接入网设备将所述前导序列信息发送给用户设备，所述前导序列信息用于供用户设备进行随机接入。
  2. 根据权利要求1所述的前导序列的配置方法，其特征在于，所述前导序列信息还包括空间级数信息，所述空间级数信息用于指示前导序列空间的码域空间层数。
  3. 根据权利要求2所述的前导序列的配置方法，其特征在于，所述接入网设备将所述前导序列信息发送给用户设备，包括：
    所述接入网设备根据所述空间级数信息生成循环冗余校验CRC码；
    所述接入网设备根据所述CRC码对主系统信息块MIB进行校验处理；
    所述接入网设备通过物理广播信道PBCH发送校验处理后的所述MIB。
  4. 根据权利要求2所述的前导序列的配置方法，其特征在于，所述接入网设备将所述前导序列信息发送给用户设备，包括：
    所述接入网设备根据所述空间级数信息生成扰码序列；
    所述接入网设备根据所述扰码序列对MIB进行加扰处理；
    所述接入网设备通过PBCH发送加扰处理后的所述MIB。
  5. 根据权利要求2所述的前导序列的配置方法，其特征在于，所述接入网设备将所述前导序列信息发送给用户设备，包括：
    所述接入网设备将所述前导序列信息中的所述空间级数信息携带于系统信息块SIB中；
    所述接入网设备通过物理下行共享信道PDSCH发送所述SIB。
  6. 根据权利要求2至5中任一项所述的前导序列的配置方法，其特征在于，所述前导序列信息还包括时频资源信息，所述时频资源信息用于指示前导序列空间在物理随机接入信道PRACH所占用的时频资源，
    所述接入网设备将所述前导序列信息发送给用户设备，还包括：
    所述接入网设备将所述前导序列信息中的所述时频资源信息携带于SIB中；
    所述接入网设备通过PDSCH发送所述SIB。
  7. 一种前导序列的配置方法，其特征在于，包括：
    用户设备获取接入网设备发送的前导序列信息，所述前导序列信息包括用于指示前导序列的数量的消息；
    所述用户设备根据所述前导序列信息进行随机接入。
  8. 根据权利要求7所述的前导序列的配置方法，其特征在于，所述前导序列信息还包括空间级数信息，所述空间级数信息用于指示前导序列空间的码域空间层数。
  9. 根据权利要求8所述的前导序列的配置方法，其特征在于，所述用户设备获取接入网设备发送的前导序列信息，包括：
    用户设备对物理广播信道PBCH进行盲检得到主系统信息块MIB，并根据盲检去除的循 环冗余校验CRC码确定空间级数信息。
  10. 根据权利要求8所述的前导序列的配置方法，其特征在于，所述用户设备获取接入网设备发送的前导序列信息，包括：
    所述用户设备对PBCH进行盲检得到MIB，并根据盲检采用的解码序列确定空间级数信息。
  11. 根据权利要求8所述的前导序列空间配置方法，其特征在于，所述用户设备获取接入网设备发送的前导序列信息，包括：
    用户设备通过物理下行共享信道PDSCH接收接入网设备发送的系统信息块SIB，所述SIB中携带前导序列信息中的空间级数信息；
    所述用户设备解析所述SIB得到所述空间级数信息。
  12. 根据权利要求8至11中任一项所述的前导序列的配置方法，其特征在于，所述前导序列信息还包括时频资源信息，所述时频资源信息用于指示前导序列空间在物理随机接入信道PRACH所占用的时频资源，
    所述用户设备获取接入网设备发送的前导序列信息，还包括：
    用户设备通过PDSCH接收接入网设备发送的SIB，所述SIB中携带前导序列信息中的时频资源信息；
    所述用户设备解析所述SIB得到所述时频资源信息。
  13. 一种接入网设备，其特征在于，包括：处理器和发射器，所述处理器和所述发射器相连接；
    所述处理器，用于确定前导序列信息，所述前导序列信息包括用于指示前导序列的数量的消息；
    所述发射器，用于将所述前导序列信息发送给用户设备，所述前导序列信息用于供用户设备进行随机接入。
  14. 根据权利要求13所述的接入网设备，其特征在于，所述前导序列信息还包括空间级数信息，所述空间级数信息用于指示前导序列空间的码域空间层数，
    所述处理器，还用于根据所述空间级数信息生成循环冗余校验CRC码；
    所述处理器，还用于根据所述CRC码对主系统信息块MIB进行校验处理；
    所述发射器，用于通过物理广播信道PBCH发送校验处理后的所述MIB。
  15. 根据权利要求13所述的接入网设备，其特征在于，所述前导序列信息还包括空间级数信息，所述空间级数信息用于指示前导序列空间的码域空间层数，
    所述处理器，还用于根据所述空间级数信息生成扰码序列；
    所述处理器，还用于根据所述扰码序列对MIB进行加扰处理；
    所述发射器，用于通过PBCH发送加扰处理后的所述MIB。
  16. 根据权利要求13所述的接入网设备，其特征在于，所述前导序列信息还包括空间级数信息，所述空间级数信息用于指示前导序列空间的码域空间层数，
    所述发射器，用于将所述前导序列信息中的所述空间级数信息携带于系统信息块SIB中；
    所述发射器，用于通过物理下行共享信道PDSCH发送所述SIB。
  17. 根据权利要求14至16中任一项所述的接入网设备，其特征在于，所述前导序列信息还包括时频资源信息，所述时频资源信息用于指示前导序列空间在物理随机接入信道PRACH所占用的时频资源，
    所述处理器，还用于将所述前导序列信息中的所述时频资源信息携带于SIB中；
    所述发射器，还用于通过PDSCH发送所述SIB。
  18. 一种用户设备，其特征在于，包括：接收器及处理器，所述接收器和所述处理器相连接；
    所述接收器，用于获取接入网设备发送的前导序列信息，所述前导序列信息包括用于指示前导序列的数量的消息；
    所述处理器，用于根据所述前导序列信息进行随机接入。
  19. 根据权利要求18所述的用户设备，其特征在于，所述前导序列信息还包括空间级数信息，所述空间级数信息用于指示前导序列空间的码域空间层数，
    所述接收器，具体用于对物理广播信道PBCH进行盲检得到主系统信息块MIB，并根据盲检去除的循环冗余校验CRC码确定空间级数信息。
  20. 根据权利要求18所述的用户设备，其特征在于，所述前导序列信息还包括空间级数信息，所述空间级数信息用于指示前导序列空间的码域空间层数，
    所述接收器，具体用于对PBCH进行盲检得到MIB，并根据盲检采用的解码序列确定空间级数信息。
  21. 根据权利要求18所述的用户设备，其特征在于，所述前导序列信息还包括空间级数信息，所述空间级数信息用于指示前导序列空间的码域空间层数，
    所述接收器，用于通过物理下行共享信道PDSCH接收接入网设备发送的系统信息块SIB，所述SIB中携带前导序列信息中的空间级数信息；
    所述接收器，还用于解析所述SIB得到所述空间级数信息。
  22. 根据权利要求19至20中任一项所述的用户设备，其特征在于，所述前导序列信息还包括时频资源信息，所述时频资源信息用于指示前导序列空间在物理随机接入信道PRACH所占用的时频资源，
    所述接收器，还用于通过PDSCH接收接入网设备发送的SIB，所述SIB中携带前导序列信息中的时频资源信息；
    所述接收器，还用于解析所述SIB得到所述时频资源信息。
PCT/CN2017/090323 2016-07-26 2017-06-27 前导序列的配置方法、用户设备及接入网设备 WO2018019071A1 (zh)

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