WO2020164412A1 - 伪随机序列初始相位的生成、配置方法及网络设备 - Google Patents

伪随机序列初始相位的生成、配置方法及网络设备 Download PDF

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Publication number
WO2020164412A1
WO2020164412A1 PCT/CN2020/074276 CN2020074276W WO2020164412A1 WO 2020164412 A1 WO2020164412 A1 WO 2020164412A1 CN 2020074276 W CN2020074276 W CN 2020074276W WO 2020164412 A1 WO2020164412 A1 WO 2020164412A1
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Prior art keywords
network device
reference signal
information
counter
pseudo
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English (en)
French (fr)
Inventor
柯颋
吴丹
徐晓东
张静文
刘建军
王启星
刘光毅
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China Mobile Communications Group Co Ltd
Research Institute of China Mobile Communication Co Ltd
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China Mobile Communications Group Co Ltd
Research Institute of China Mobile Communication Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/04Network management architectures or arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08Configuration management of networks or network elements
    • H04L41/0803Configuration setting
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00Network architectures or network communication protocols for network security
    • H04L63/20Network architectures or network communication protocols for network security for managing network security; network security policies in general
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40Network security protocols

Definitions

  • the present disclosure relates to the field of communication technology, and in particular to a method for generating and configuring an initial phase of a pseudo-random sequence, and network equipment.
  • the waveguide layer When the atmospheric duct phenomenon occurs, there will be a layer in the troposphere where the temperature inversion or the water vapor decreases sharply with height, which is called the waveguide layer. Most of the radio wave radiation will be confined in this waveguide layer and propagate super-refraction. Trans-horizon propagation allows radio signals to travel long distances and withstand low path propagation losses.
  • Time Division Duplex (TDD) systems for example, 4G LTE systems or 5G NR systems
  • the DL signal of the remote base station will cause strong UL data reception of the local base station interference.
  • the DL signal sent by the remote interference site or Aggressor site, or Interfering site
  • the DL signal sent by the remote interference site will still have high energy after being propagated in an ultra-long distance (such as tens or hundreds of kilometers). It falls within the UL signal reception window of the local victim site (Victim site, or Interfered site), which causes strong interference to the UL data reception of the local base station.
  • the uplink IOT can rise up to 25dB, and the KPI indicators such as the success rate of RRC connection establishment have deteriorated seriously.
  • the affected cell is dominated by the rural F-band, the interference time is mainly concentrated in 0:00-8:00, and the number of affected base stations ranges from hundreds to tens of thousands.
  • the initial phase of the TD-LTE remote interference management reference signal is taken from the preset set.
  • a characteristic sequence specially used for remote interference detection is defined.
  • the characteristic sequence The original sequence is the Gold sequence, and the sequence length is 1023.
  • the victim station When the victim station detects remote interference, it will select a characteristic sequence and send a dedicated RS (reference signal) for remote interference detection; when the interferer station detects the RS, the interferer station performs interference fallback Operations (such as reducing downlink DL transmission symbols) to eliminate the interference caused by the victim station.
  • RS reference signal
  • the main problem of the above solution is that the fixed RS initial phase set is vulnerable to malicious attacks, resulting in a serious decrease in the DL transmission performance of the entire network.
  • the attacker actively sends a dedicated RS for remote interference detection, and its initial phase is taken from the preset initial phase set.
  • the RS When other base stations in the network detect the RS, they may mistakenly judge that they are the interfering station of a certain base station, and then perform interference fallback operations.
  • the DL throughput of the entire network will be severely reduced.
  • the embodiments of the present disclosure provide a method for generating and configuring an initial phase of a pseudo-random sequence, and a network device, thereby improving network security.
  • the embodiments of the present disclosure provide the following technical solutions:
  • a method for generating the initial phase of a pseudo-random sequence is applied to a network device, and the method includes:
  • the initial phase of the pseudo-random sequence is generated.
  • the above method further includes: generating a pseudo-random sequence according to the initial phase.
  • the above method further includes: generating a reference signal according to a pseudo-random sequence; the reference signal is a remote interference management reference signal or used to indicate at least one of the following: the network device is interfered by the remote end, so The state in which the network device is interfered by the remote end, the maximum number of uplink orthogonal frequency division multiplexing OFDM symbols in the network device that is interfered by the remote end, whether the atmospheric duct phenomenon exists, and the network device number of the network device.
  • the reference signal is a remote interference management reference signal or used to indicate at least one of the following: the network device is interfered by the remote end, so The state in which the network device is interfered by the remote end, the maximum number of uplink orthogonal frequency division multiplexing OFDM symbols in the network device that is interfered by the remote end, whether the atmospheric duct phenomenon exists, and the network device number of the network device.
  • obtaining scrambling information includes:
  • the scrambling information is obtained from the scrambling information set.
  • the network device number is a network management unit, a dedicated mark configured for signaling between network devices, an international mobile subscriber identification number, a temporary identification number generated and maintained by a mobile management entity, a permanent identification assigned by a device manufacturer, and a core At least one of a dynamic identification assigned by the network, a network device group identification, and a cell identification.
  • the index value is determined according to the network device number and/or the function of the reference signal, including:
  • determining the first offset according to the function of the reference signal includes:
  • the reference signal is a second type of reference signal, determining that the first offset is equal to 0;
  • the reference signal is a first-type reference signal, and the first-type reference signal is not used to carry information related to interference suppression, determining that the first offset is equal to 0;
  • the reference signal is a first-type reference signal and is used to carry first-type interference suppression information, determining that the first offset is equal to the second preset value
  • the reference signal is a first-type reference signal and is used to carry second-type interference suppression information, it is determined that the first offset is equal to the third preset value.
  • determining the second offset according to the network device number includes:
  • obtaining time information includes:
  • the time information is determined according to the counter and/or the first time parameter.
  • the counter includes at least one of the following counters:
  • At least one type of counter starts counting according to a preset global satellite navigation system GNSS timing; and the preset GNSS timing and the first time parameter are configured through the network management OAM.
  • determining the time information according to the counter and/or the first time parameter includes:
  • the second time parameter is the at least one counter or a combination of the at least one counter
  • the Z and a are preset parameters or configured through the network management OAM.
  • generating the initial phase of the pseudo-random sequence according to the scrambling information and time information includes:
  • c init is the initial phase of the pseudo-random sequence
  • n t is the time information
  • n SCID is the scrambling information
  • ⁇ , ⁇ , ⁇ , and ⁇ are preset constants.
  • n SCID ranges 0 ⁇ n SCID ⁇ N
  • ⁇ , ⁇ , ⁇ , and ⁇ adopt at least one of the following configurations:
  • generating a pseudo-random sequence according to the initial phase includes:
  • r(m) is a pseudo-random sequence
  • c(i) is generated according to the following formula:
  • x 1 (n+31) (x 1 (n+3)+x 1 (n))mod 2
  • x 2 (n+31) (x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n))mod 2
  • n 0,1,...,M PN -1, and M PN is the length of the pseudo-random sequence r(m);
  • the initialization value of the second m sequence x 2 (n) is determined by c init , where,
  • the embodiment of the present disclosure also provides a pseudo-random sequence initial phase configuration method, which is applied to a network management device, and the method includes:
  • At least one of the following parameters is configured for the network device to determine the initial phase of the pseudo-random sequence of the network device, and the at least one of the following parameters includes:
  • Network device number scrambling information collection, preset GNSS timing, first time parameters.
  • the scrambling information set configured for the network device includes:
  • the embodiment of the present disclosure also provides a network device, including:
  • the processor is used to obtain scrambling information and time information
  • the initial phase of the pseudo-random sequence is generated.
  • the embodiment of the present disclosure also provides a network management device, including:
  • the processor is configured to configure at least one of the following parameters for the network device to determine the initial phase of the pseudo-random sequence of the network device.
  • the at least one of the following parameters includes: a network device number, a set of scrambling information, and preset GNSS timing, The first time parameter.
  • the processor configures the scrambling information set for the network device, it is used to: determine the update period T2 of the scrambling information set so that the T2 is less than or equal to the maximum value range T1 of the time information n t ; according to the T2 Update the scrambling information collection.
  • Embodiments of the present disclosure also provide a computer storage medium, including instructions, which when run on a computer, cause the computer to execute the method described above.
  • the scrambling information set is queried according to the network device number and/or the function of the reference signal to obtain the scrambling information; and the initial phase of the pseudo-random sequence is generated according to the obtained scrambling information and time information. Since operators regularly update the scrambling information set, the attacker cannot grasp the scrambling information in time, and it is difficult for the attacker to actively generate false pseudo-random sequences; on the other hand, during the scrambling information set update cycle, due to the The initial phase changes with time, that is, the initial phases corresponding to different time periods are different, so it can also prevent repeater jamming. Therefore, the present disclosure can improve network security.
  • FIG. 1 is a flowchart of a method for generating an initial phase of a pseudo-random sequence according to an embodiment of the disclosure
  • FIG. 2 is a flowchart of a method for initial phase configuration of a pseudo-random sequence according to an embodiment of the disclosure
  • FIG. 3 is a schematic diagram of the architecture of the network device of the present disclosure.
  • an embodiment of the present disclosure provides a method for generating an initial phase of a pseudo-random sequence, which is applied to a network device, and the method includes:
  • Step 11 Obtain scrambling information and time information
  • Step 12 Generate an initial phase of a pseudo-random sequence according to the scrambling information and time information.
  • the method may also include:
  • Step 13 generating a pseudo-random sequence according to the initial phase
  • Step 14 Generate a reference signal according to the pseudo-random sequence; the reference signal is a remote interference management reference signal or used to indicate at least one of the following: the network device is subject to remote interference, and the network device is subject to remote interference
  • the maximum number of uplink orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiple Access, OFDM) symbols in the network device subject to remote interference indicates whether the atmospheric duct phenomenon exists, and the network device number of the network device.
  • OFDM Orthogonal frequency division multiplexing
  • the network device number is a network management unit, a dedicated mark for signaling configuration between network devices, an international mobile subscriber identification number, a temporary identification number generated and maintained by a mobile management entity, a permanent identification assigned by a device manufacturer, and a core network assigned At least one of the dynamic identification, the network device group identification, and the cell identification.
  • obtaining scrambling information may include:
  • Step 111 Determine an index value n index according to the network device number and/or the function of the reference signal
  • the index value is a first preset value.
  • the first preset value is equal to zero.
  • the reference signal is a second type reference signal (RIM RS2), it is determined that the index value is equal to 0;
  • the second offset is determined according to the network device number, and the index value is determined to be the second offset.
  • the index value is determined only according to the network device number;
  • the first offset determines the second offset according to the network device number, and determine that the index value is equal to the first offset plus the second offset.
  • the reference signal is a type 1 reference signal
  • the first reference signal is used to carry type 1 or type 2 interference suppression information, according to the network device number and the function of the reference signal (such as indicating whether it needs to be implemented
  • the interference station increases the interference suppression level) to jointly determine the index value.
  • the information related to interference suppression includes:
  • the first type of interference suppression information indicates that the network equipment is subject to remote interference, and the interfering station needs to increase the interference suppression level (ie "Not enough mitigation, further actions needed”);
  • the second type of interference suppression information indicates that the network device is subject to remote interference and the interfering station needs to maintain the current interference suppression level (ie, "Enough mitigation, no further actions needed”).
  • determining the first offset according to the function of the reference signal includes:
  • the reference signal is a second type of reference signal, determining that the first offset is equal to 0;
  • the reference signal is a first-type reference signal, and the first-type reference signal is not used to carry information related to interference suppression, determining that the first offset is equal to 0;
  • the reference signal is a first-type reference signal and is used to carry first-type interference suppression information, determining that the first offset is equal to the second preset value
  • the reference signal is a first-type reference signal and is used to carry second-type interference suppression information, it is determined that the first offset is equal to the third preset value.
  • determining the second offset according to the network device number includes:
  • Second offset mod (network device number, L), where L is a positive integer .
  • the value range of the second offset is 0, 1,..., L-1.
  • L is determined according to the value range of the first offset.
  • the second offset is determined according to some bits in the network device number. Use at least one of the following methods, including:
  • the second offset the low Q bit of the network device number
  • the second offset the high Q bit of the network device number
  • the second offset the Pth to P+Q-1 bits of the network device number from the LSB; or,
  • the second offset the Pth to P+Q-1 bits of the network device number from the MSB.
  • Step 112 Query the scrambling information set according to the index value n index to obtain scrambling information n SCID .
  • H is a positive integer, which is determined according to the maximum value range of the index value n index .
  • the operator regularly updates the scrambling information set, so that the attacker cannot grasp the scrambling information in time; in addition, since the scrambling information set is configured through the network management OAM, the OAM configuration operation cannot be too frequent (for example, 1 The configuration is updated every day or a week), so operators also need to guard against repeater jamming.
  • the so-called forwarding interference refers to that the attacker first buffers a section of the received signal waveform, and then forwards the buffered signal waveform at intervals. For example, an attacker can buffer a section of the received signal waveform when the duct exists, and then forward the buffered signal waveform when the duct does not exist.
  • an optional technique allows the initial phase to change in time.
  • obtaining time information includes:
  • the time information is determined according to the counter and/or the first time parameter.
  • the counter includes at least one of the following counters: hour counter, minute counter, reference signal transmission cycle counter, 20ms counter, radio frame counter, TDD uplink-downlink mode counter, TDD uplink-downlink conversion cycle counter, joint TDD uplink-downlink Conversion cycle counter, slot counter and OFDM symbol counter.
  • TDD uplink and downlink switching period TDD uplink and downlink switching period (TDD DL/UL switching period, or TDD switching period), that is, the period of a single TDD uplink and downlink pattern (periodicity of the TDD DL/UL pattern) .
  • At least one counter starts counting according to a preset Global Navigation Satellite System (GNSS); and the preset GNSS timing and the first time parameter are configured through the network management OAM.
  • GNSS Global Navigation Satellite System
  • determining the time information according to the counter and/or the first time parameter includes:
  • the second time parameter is the at least one counter or a combination of the at least one counter
  • the Z and a are preset parameters or configured through OAM.
  • the parameter Z is determined according to the maximum value period T1 of the time information n t .
  • the time information mod (the second time parameter + the first time parameter, Z)
  • the second time parameter is the at least one counter
  • the combination of the at least one counter refers to calculating the time information or calculating a certain component of the time information according to the functional relationship of the at least one counter.
  • the first time information n t 60 ⁇ T hour + T minute ;
  • T hour is the hour counter
  • T minute is the minute counter
  • the first time information :
  • n f is a radio frame counter
  • l is the OFDM symbol counter of the slot
  • T 1 means the length of time intervals, n t value is incremented by one.
  • the foregoing embodiment can resist repeater jamming between the first time unit T 1 , but cannot resist repeater jamming within the first time unit T 1 .
  • the scale of the first time unit T 1 should be between minutes and hours.
  • the minute counter and the reference signal transmission cycle counter are optional values.
  • step 12 may specifically include:
  • is determined according to the maximum value range of n SCID ;
  • n SCID ranges 0 ⁇ n SCID ⁇ N
  • And ⁇ , ⁇ , ⁇ , and ⁇ adopt at least one of the following configurations:
  • step 13 may specifically include:
  • r(m) is a pseudo-random sequence
  • c(i) is generated according to the following formula:
  • x 1 (n+31) (x 1 (n+3)+x 1 (n))mod 2
  • x 2 (n+31) (x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n))mod 2
  • n 0,1,...,M PN -1, and M PN is the length of the pseudo-random sequence r(m);
  • the initialization value of the second m sequence x 2 (n) is determined by c init , where,
  • the reference signal is a remote interference management reference signal.
  • the remote interference management reference signal may be the first type of remote interference management reference signal (RIM RS1), the second type of remote interference management reference signal (RIM RS2), and the first type of interference suppression information that carries the first type. Any one of the first type of remote interference management reference signal (RIM RS1 for not enough mitigation), and the first type of remote interference management reference signal (RIM RS1 for not enough mitigation) that carries the second type of interference suppression information.
  • the first-type remote interference management reference signal that carries the first-type interference suppression information indicates that the first network device is subject to remote interference, and the interfering station needs to increase the interference suppression level (that is, “Not enough mitigation, further actions needed” "); and the first type of remote interference management reference signal (RIM RS1 forenough mitigation) that carries the second type of interference suppression information indicates that the first network device is subject to remote interference, and the interfering station needs to maintain the current interference suppression Level (ie "Enough mitigation, no further actions needed").
  • the first network device sends the generated first reference signal
  • the second network device at the remote end can receive the first reference signal, it indicates that there is an atmospheric duct phenomenon.
  • the second network device (specifically, the interfering base station with far-end interference) hears the first reference signal in the Xth uplink OFDM symbol, and the second network device knows the first network in advance
  • the device that is, the network device that sends the first reference signal, specifically, the interfered base station with remote interference
  • the second network device can infer that if it also transmits downlink data at the same maximum downlink transmission boundary (for example, Physical Downlink Shared Channel (PDSCH), downlink reference signal, etc.), it The sent downlink data will cause far-end interference to at most X uplink OFDM symbols of the first communication device. Therefore, the first reference signal can provide the maximum number of uplink OFDM symbols subject to far-end interference in the first network device; X is an integer greater than or equal to 1.
  • PDSCH Physical Downlink Shared Channel
  • X is an integer greater than or equal to 1.
  • the first reference signal is used to indicate that the first network device is subject to remote interference.
  • the first reference signal can also carry additional information, such as indicating that the first network device is subject to far-end interference, and the interfering station needs to increase the interference suppression level (ie "Not enough mitigation, further actions needed”); or, indicating that the first network device is interfered by a remote end, and the interfering station needs to maintain the current interference suppression level (ie, “Enough mitigation, no further actions needed”).
  • the above-mentioned embodiments of the present disclosure are aimed at determining the initial phase set of the remote interference detection reference signal (RIM-RS) in the related technology through the standard.
  • the resulting RIM-RS is easy to be disguised and attacked by an attacker, thereby leading to DL transmission of the entire network
  • the improved RIM-RS initial phase generation method described in the above-mentioned embodiment of the present disclosure queries the scrambling information set according to the network device number and/or the function of the reference signal to obtain the scrambling information; According to the obtained scrambling information and time information, the initial phase of the pseudo-random sequence is generated.
  • the present disclosure can improve network security.
  • an embodiment of the present disclosure also provides a pseudo-random sequence initial phase configuration method, which is applied to a network management device, the method includes:
  • Step 21 Configure at least one of the following parameters for the network device to determine the initial phase of the pseudo-random sequence of the network device, the at least one of the following parameters includes:
  • Network device number scrambling information collection, preset GNSS timing, first time parameters, preset parameters L, Z, a.
  • configuring the scrambling information set for the first communication device includes:
  • an embodiment of the present disclosure also provides a network device 30, including:
  • the processor 32 is configured to obtain scrambling information and time information; according to the scrambling information and time information, generate an initial phase of a pseudo-random sequence.
  • the processor 32 is further configured to generate a pseudo-random sequence according to the initial phase.
  • the processor 32 is further configured to generate a reference signal according to a pseudo-random sequence; the reference signal is a remote interference management reference signal or is used to indicate at least one of the following: the network device is subject to remote interference, and the network The state of the device being interfered by the remote end, the maximum number of uplink orthogonal frequency division multiplexing OFDM symbols in the network device that is interfered by the remote end, whether the atmospheric duct phenomenon exists, and the network device number of the network device.
  • the reference signal is a remote interference management reference signal or is used to indicate at least one of the following: the network device is subject to remote interference, and the network The state of the device being interfered by the remote end, the maximum number of uplink orthogonal frequency division multiplexing OFDM symbols in the network device that is interfered by the remote end, whether the atmospheric duct phenomenon exists, and the network device number of the network device.
  • obtaining scrambling information includes:
  • the scrambling information is obtained from the scrambling information set.
  • the network device number is a network management unit, a dedicated mark configured for signaling between network devices, an international mobile subscriber identification number, a temporary identification number generated and maintained by a mobile management entity, a permanent identification assigned by a device manufacturer, and a core At least one of a dynamic identification assigned by the network, a network device group identification, and a cell identification.
  • the index value is determined according to the network device number and/or the function of the reference signal, including:
  • determining the first offset according to the function of the reference signal includes:
  • the reference signal is a second type of reference signal, determining that the first offset is equal to 0;
  • the reference signal is a first-type reference signal, and the first-type reference signal is not used to carry information related to interference suppression, determining that the first offset is equal to 0;
  • the reference signal is a first-type reference signal and is used to carry first-type interference suppression information, determining that the first offset is equal to the second preset value
  • the reference signal is a first-type reference signal and is used to carry second-type interference suppression information, it is determined that the first offset is equal to the third preset value.
  • determining the second offset according to the network device number includes:
  • the second offset mod (network device number, L) determines the second offset, where L is a positive integer
  • acquiring time information includes: determining the time information according to a counter and/or a first time parameter.
  • the counter includes at least one of the following counters: hour counter, minute counter, reference signal transmission cycle counter, 20ms counter, radio frame counter, TDD uplink-downlink mode counter, TDD uplink-downlink conversion cycle counter, joint TDD uplink-downlink Conversion cycle counter, slot counter and OFDM symbol counter.
  • At least one type of counter starts counting according to a preset global satellite navigation system GNSS timing; and the preset GNSS timing and the first time parameter are configured through the network management OAM.
  • determining the time information according to the counter and/or the first time parameter includes:
  • the second time parameter is the at least one counter or a combination of the at least one counter
  • the Z and a are preset parameters, or configured through the network management OAM
  • generating the initial phase of the pseudo-random sequence according to the scrambling information and time information includes:
  • c init is the initial phase of the pseudo-random sequence
  • n t is the time information
  • n SCID is the scrambling information
  • ⁇ , ⁇ , ⁇ , and ⁇ are preset constants.
  • n SCID ranges 0 ⁇ n SCID ⁇ N
  • ⁇ , ⁇ , ⁇ , and ⁇ adopt at least one of the following configurations:
  • generating a pseudo-random sequence according to the initial phase includes:
  • r(m) is a pseudo-random sequence
  • c(i) is generated according to the following formula:
  • x 1 (n+31) (x 1 (n+3)+x 1 (n))mod 2
  • x 2 (n+31) (x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n))mod 2
  • n 0,1,...,M PN -1, and M PN is the length of the pseudo-random sequence r(m);
  • the initialization value of the second m sequence x 2 (n) is determined by c init , where,
  • the network device is a network device corresponding to the method shown in FIG. 1 above, and all the implementation manners in the foregoing method embodiment are applicable to the embodiment of the network device, and the same technical effect can also be achieved.
  • the network device may further include a transceiver 31 and a memory 33, and the transceiver 31 and the memory 33 can be connected via a bus interface.
  • the functions of the transceiver 31 can be implemented by the processor 32, and the functions of the processor 32 are also It can be realized by the transceiver 31.
  • the embodiment of the present disclosure also provides a network management device, including:
  • the processor is configured to configure at least one of the following parameters for the network device to determine the initial phase of the pseudo-random sequence of the network device.
  • the at least one of the following parameters includes: a network device number, a set of scrambling information, and preset GNSS timing, The first time parameter.
  • the processor when the processor configures the scrambling information set for the network device, it is specifically configured to: determine the update period T2 of the scrambling information set so that the T2 is less than or equal to the maximum value range T1 of the time information n t ; The T2 updates the scrambling information set.
  • the embodiment of the present disclosure also provides a computer storage medium, including instructions, which when the instructions are run on the computer, cause the computer to execute the method described in FIG. 1 or FIG. 2 above.
  • the disclosed device and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present disclosure essentially or the part that contributes to the related technology or the part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium, including several
  • the instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present disclosure.
  • the aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.
  • each component or each step can be decomposed and/or recombined.
  • decomposition and/or recombination should be regarded as equivalent solutions of the present disclosure.
  • the steps of performing the above series of processing can naturally be performed in a time sequence in the order of description, but do not necessarily need to be performed in a time sequence, and some steps can be performed in parallel or independently of each other.
  • the purpose of the present disclosure can also be realized by running a program or a group of programs on any computing device.
  • the computing device may be a well-known general-purpose device. Therefore, the purpose of the present disclosure can also be achieved only by providing a program product containing program code for implementing the method or device. That is, such a program product also constitutes the present disclosure, and a storage medium storing such a program product also constitutes the present disclosure.
  • the storage medium may be any well-known storage medium or any storage medium developed in the future. It should also be pointed out that, in the device and method of the present disclosure, obviously, each component or each step can be decomposed and/or recombined.

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Abstract

本公开公开了一种伪随机序列初始相位的生成、配置方法及网络设备。网络设备的方法包括:获取加扰信息和时间信息;根据所述加扰信息和时间信息,生成伪随机序列的初始相位。

Description

伪随机序列初始相位的生成、配置方法及网络设备
相关申请的交叉引用
本申请主张在2019年2月15日在中国提交的中国专利申请号No.201910118045.1的优先权,其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域,尤其涉及一种伪随机序列初始相位的生成、配置方法及网络设备。
背景技术
在春夏、夏秋之交的内陆地区,或冬季的沿海地区,容易发生大气波导(Surface ducting)现象。
当大气波导现象发生时,对流层中将存在逆温或水汽随高度急剧变小的层次,称为波导层,大部分无线电波辐射都将被限制在该波导层中,进行超折射传播。超视距传播使得无线电信号可以传播很远的距离,且经受较低的路径传播损失。
对时分复用(Time Division Duplex,TDD)系统(例如,4G LTE系统或5G NR系统)而言,大气波导现象发生时,远端基站的DL信号将会对本地基站的UL数据接收造成较强干扰。因为存在大气波导层,远端施扰站(Interference site,or Aggressor site,or Interfering site)发送的DL信号经过超远距离(如数十或数百公里)空间传播后,仍具有较高能量,其落在本地受扰站(Victim site,or Interfered site)的UL信号接收窗口内,从而对本地基站的UL数据接收造成较强干扰。
TD-LTE现网中发现,TD-LTE大面积上行受扰,上行IOT抬升可达25dB,RRC连接建立成功率等KPI指标恶化严重。受扰小区以农村F频段为主,干扰时间主要集中在0:00-8:00,受影响基站数几百到几万不等。
TD-LTE远端干扰管理参考信号的初始相位从预设集合中取值,为了应对TD-LTE网络中远端干扰问题,定义了专门用于远端干扰探测的特征序列,其 中,特征序列的原始序列为Gold序列,序列长度为1023。特征序列共四条,预先设置所述四条特征序列的初始相位。
当受扰站检测到远端干扰时,它将选择一条特征序列,发送用于远端干扰检测的专用RS(参考信号);当施扰站检测到该RS时,施扰站执行干扰回退操作(如减少下行链路DL传输符号),以消除其对受扰站造成的干扰。
上述方案主要问题是,固定RS初始相位集合很容易受到恶意攻击,导致整个网络的DL传输性能严重下降。
例如,当大气波导现象没有发生时,攻击者主动发送远端干扰检测的专用RS,其初始相位从预设的初始相位集合中取值。网络中其他基站检测到该RS时,可能会错误判断自己是某个基站的施扰站,进而执行干扰回退操作。当网络中大量基站都执行干扰回退操作时,整个网络的DL吞吐量将严重下降。
发明内容
本公开实施例提供了一种伪随机序列初始相位的生成、配置方法及网络设备,提高了网络安全性。
为解决上述技术问题,本公开的实施例提供如下技术方案:
一种伪随机序列初始相位的生成方法,应用于网络设备,所述方法包括:
获取加扰信息和时间信息;
根据所述加扰信息和时间信息,生成伪随机序列的初始相位。
其中,上述方法还包括:根据所述初始相位生成伪随机序列。
其中,上述方法还包括:还包括:根据伪随机序列生成参考信号;所述参考信号为远端干扰管理参考信号或者用于指示以下中的至少一项:所述网络设备受到远端干扰,所述网络设备受到远端干扰的状态,所述网络设备中受到远端干扰的上行正交频分复用OFDM符号的最大数量,大气波导现象是否存在,所述网络设备的网络设备编号。
其中,获取加扰信息,包括:
根据网络设备编号和/或参考信号的功能,确定索引值;
根据索引值,从加扰信息集合中获得加扰信息。
其中,所述网络设备编号为网管单元、网络设备间信令配置的专用标记、国际移动用户识别码、由移动管理实体产生并维护的临时识别号、由设备制造商分配的永久标识、由核心网分配的动态标识、网络设备组标识和小区标识中的至少一种。
其中,根据网络设备编号和/或参考信号的功能,确定索引值,包括:
当所述参考信号为第一预设功能时,确定所述索引值为第一预设值;或者,
当所述参考信号为第二预设功能时,根据网络设备编号,确定第二偏移量,确定所述索引值为所述第二偏移量;或者,
根据所述参考信号的功能,确定第一偏移量,根据网络设备编号,确定第二偏移量,确定所述索引值等于第一偏移量加上第二偏移量。
其中,根据所述参考信号的功能,确定第一偏移量,包括:
如果所述参考信号为第二类参考信号,则确定第一偏移量等于0;
如果所述参考信号为第一类参考信号,且所述第一类参考信号不用于承载干扰抑制的相关信息,则确定第一偏移量等于0;
如果所述参考信号为第一类参考信号,且用于承载第一类干扰抑制信息,则确定第一偏移量等于第二预设值;
如果所述参考信号为第一类参考信号,且用于承载第二类干扰抑制信息,则确定第一偏移量等于第三预设值。
其中,所述第二预设值=0,所述第三预设值=L;或,
所述第二预设值=L,所述第三预设值=0;其中,L为正整数。
其中,根据网络设备编号,确定第二偏移量,包括:
根据所述网络设备编号中的部分比特位确定第二偏移量;或者,
根据公式:第二偏移量=mod(网络设备编号,L)确定第二偏移量,其中,L为正整数。
其中,获取时间信息,包括:
根据计数器和/或第一时间参数,确定所述时间信息。
其中,所述计数器包括以下计数器中的至少一种:
小时计数器、分钟计数器、参考信号发送周期计数器、20ms计数器、无 线帧计数器、TDD上下行模式计数器、TDD上下行转换周期计数器、联合TDD上下行转换周期计数器、时隙计数器和OFDM符号计数器。
其中,至少一种计数器根据预设全球卫星导航系统GNSS定时开始计数;且所述预设GNSS定时和所述第一时间参数通过网管OAM配置。
其中,根据计数器和/或第一时间参数,确定所述时间信息,包括:
确定所述时间信息=所述第一时间参数;或者,
确定所述时间信息=所述第二时间参数;或者,
确定所述时间信息=所述第二时间参数+所述第一时间参数;或者,
确定所述时间信息=mod(所述第二时间参数+所述第一时间参数,Z);或者,
确定所述时间信息=mod(所述第二时间参数×所述第一时间参数,Z);或者,
确定所述时间信息=mod(所述第二时间参数×所述第一时间参数+a,Z),
其中,所述第二时间参数为所述至少一种计数器,或者为所述至少一种计数器的组合形式;
所述Z和a为预设参数,或者通过网管OAM配置。
其中,根据所述加扰信息和时间信息,生成伪随机序列的初始相位,包括:
根据公式c init=(2 α·n t·(δ·n SCID+β)+γ·n SCID)mod 2 31生成伪随机序列的初始相位;其中,
c init为伪随机序列的初始相位;
n t为所述时间信息;
n SCID为所述加扰信息;
α、β、γ、δ为预设常数。
其中,γ=1 or 2;β=0 or 0.5or1;δ=0 or 1;α的取值根据n SCID的最大取值范围确定。
其中,所述n SCID的取值范围为0≤n SCID≤N,且
Figure PCTCN2020074276-appb-000001
且α、β、γ、δ采用如下至少一种配置:
第一配置:α=M,β=0,γ=1,δ=1;
第二配置:α=M+1,β=0,γ=2,δ=1;
第三配置:α=M+1,β=0.5,γ=1,δ=1;
第四配置:α=M+2,β=0.5,γ=2,δ=1;
第五配置:α=M,β=1,γ=1,δ=0。
其中,根据所述初始相位生成伪随机序列,包括:
根据公式:
Figure PCTCN2020074276-appb-000002
生成伪随机序列;
其中,r(m)为伪随机序列;c(i)根据如下公式生成:
c(n)=(x 1(n+N C)+x 2(n+N C))mod 2
x 1(n+31)=(x 1(n+3)+x 1(n))mod 2
x 2(n+31)=(x 2(n+3)+x 2(n+2)+x 2(n+1)+x 2(n))mod 2
且,n=0,1,...,M PN-1,M PN为伪随机序列r(m)的长度;
N C=1600;
第一个m序列x 1(n)被初始化为x 1(0)=1,x 1(n)=0,n=1,2,...,30;
第二个m序列x 2(n)的初始化值由c init确定,其中,
Figure PCTCN2020074276-appb-000003
本公开的实施例还提供一种伪随机序列初始相位配置方法,应用于网管设备,所述方法包括:
为网络设备配置如下至少一种参数,用于确定网络设备的伪随机序列初始相位,所述如下至少一种参数包括:
网络设备编号,加扰信息集合、预设GNSS定时,第一时间参数。
其中,为网络设备配置加扰信息集合包括:
确定加扰信息集合的更新周期T2,使得所述T2小于或等于时间信息n t的最大取值范围T1;
根据所述T2更新加扰信息集合。
本公开的实施例还提供一种网络设备,包括:
处理器,用于获取加扰信息和时间信息;
根据所述加扰信息和时间信息,生成伪随机序列的初始相位。
本公开的实施例还提供一种网管设备,包括:
处理器,用于为网络设备配置如下至少一种参数,用于确定网络设备的伪随机序列初始相位,所述如下至少一种参数包括:网络设备编号,加扰信 息集合、预设GNSS定时,第一时间参数。
其中,所述处理器为网络设备配置加扰信息集合时用于:确定加扰信息集合的更新周期T2,使得所述T2小于或等于时间信息n t的最大取值范围T1;根据所述T2更新加扰信息集合。
本公开的实施例还提供一种计算机存储介质,包括指令,当所述指令在计算机运行时,使得计算机执行如上所述的方法。
本公开实施例的有益效果是:
本公开的上述实施例中,根据网络设备编号和/或参考信号的功能,查询加扰信息集合,获取获得加扰信息;根据获得的加扰信息和时间信息,生成伪随机序列的初始相位。由于运营商定期更新加扰信息集合,使得攻击者无法及时掌握加扰信息,进而攻击者难以主动生成虚假的伪随机序列;另一方面,在加扰信息集合更新周期内,由于伪随机序列的初始相位随时间变化,即不同时间段所对应的初始相位不同,因此还能防备转发干扰(repeater jamming)。因此本公开可以提高网络安全性。
附图说明
图1为本公开的实施例伪随机序列初始相位的生成方法流程图;
图2为本公开的实施例伪随机序列初始相位配置方法流程图;
图3为本公开的网络设备的架构示意图。
具体实施方式
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例,然而应当理解,可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反,提供这些实施例是为了能够更透彻地理解本公开,并且能够将本公开的范围完整的传达给本领域的技术人员。
如图1所示,本公开的实施例提供一种伪随机序列初始相位的生成方法,应用于网络设备,所述方法包括:
步骤11,获取加扰信息和时间信息;
步骤12,根据所述加扰信息和时间信息,生成伪随机序列的初始相位。
进一步的,该方法还可以包括:
步骤13,根据所述初始相位生成伪随机序列;
步骤14,根据伪随机序列生成参考信号;所述参考信号为远端干扰管理参考信号或者用于指示以下中的至少一项:所述网络设备受到远端干扰,所述网络设备受到远端干扰的状态,所述网络设备中受到远端干扰的上行正交频分复用(Orthogonal Frequency Division Multiple Access,OFDM)符号的最大数量,指示大气波导现象是否存在,所述网络设备的网络设备编号。所述网络设备编号为网管单元、网络设备间信令配置的专用标记、国际移动用户识别码、由移动管理实体产生并维护的临时识别号、由设备制造商分配的永久标识、由核心网分配的动态标识、网络设备组标识和小区标识中的至少一种。
本公开的一实施例中,步骤11中,获取加扰信息,可以包括:
步骤111,根据网络设备编号和/或参考信号的功能,确定索引值n index
具体的,当所述参考信号为第一预设功能时,确定所述索引值为第一预设值。在一种实施例中,第一预设值等于0。例如,当所述参考信号为第二类参考信号(RIM RS2)时,确定所述索引值等于0;
或者,当所述参考信号为第二预设功能时,根据网络设备编号,确定第二偏移量,确定所述索引值为第二偏移量。例如,当所述参考信号为第一类参考信号(RIM RS1),且所述第一参考信号不用于承载干扰抑制的相关信息,只根据网络设备编号,确定所述索引值;
或者,根据所述参考信号的功能,确定第一偏移量,根据网络设备编号,确定第二偏移量,确定所述索引值等于第一偏移量加上第二偏移量。例如,如果所述参考信号为第一类参考信号,且所述第一参考信号用于承载第一类或第二类干扰抑制信息,根据网络设备编号和参考信号的功能(如指示是否需要施扰站增加干扰抑制水平)共同确定所述索引值。所述干扰抑制的相关信息,包含:
第一类干扰抑制信息:指示所述网络设备受到远端干扰,且需要施扰站增加干扰抑制水平(即“Not enough mitigation,further actions needed”);
第二类干扰抑制信息:指示所述网络设备受到远端干扰,且需要施扰站 维持当前的干扰抑制水平(即“Enough mitigation,no further actions needed”)。
上述步骤111中,根据所述参考信号的功能,确定第一偏移量,包括:
如果所述参考信号为第二类参考信号,则确定第一偏移量等于0;
如果所述参考信号为第一类参考信号,且所述第一类参考信号不用于承载干扰抑制的相关信息,则确定第一偏移量等于0;
如果所述参考信号为第一类参考信号,且用于承载第一类干扰抑制信息,则确定第一偏移量等于第二预设值;
如果所述参考信号为第一类参考信号,且用于承载第二类干扰抑制信息,则确定第一偏移量等于第三预设值。
其中,所述第二预设值=0,所述第三预设值=L;或,所述第二预设值=L,所述第三预设值=0;其中,L为正整数。L根据第一偏移量的取值范围确定。
上述步骤111中,根据网络设备编号,确定第二偏移量,包括:
根据所述网络设备编号中的部分比特位确定第二偏移量;或者,根据公式:第二偏移量=mod(网络设备编号,L)确定第二偏移量,其中,L为正整数。
因此,第二偏移量的取值范围为0,1,…,L-1。或者说,根据第一偏移量的取值范围确定L。
在一种实施例中,根据所述网络设备编号中的部分比特位确定第二偏移量。采用如下至少一种方法,包括:
第二偏移量=网络设备编号的低Q位;或,
第二偏移量=网络设备编号的高Q位;或,
第二偏移量=网络设备编号从LSB算起的第P到第P+Q-1位;或,
第二偏移量=网络设备编号从MSB算起的第P到第P+Q-1位。
其中,
Figure PCTCN2020074276-appb-000004
步骤112,根据索引值n index,查询加扰信息集合,获得加扰信息n SCID
表1:加扰信息集合
n index nSCID
0
1
H-1
其中,H为正整数,根据索引值n index的最大取值范围确定。
在一种实施例中,运营商定期更新加扰信息集合,让攻击者无法及时掌握加扰信息;另外,由于加扰信息集合通过网管OAM配置下来,而OAM配置操作不可能过于频繁(例如1天或1星期更新一次配置),因此运营商还需要防备转发干扰(repeater jamming)。所谓转发干扰,指的是攻击者先缓存一段接收信号波形,隔一段时间再把缓存的信号波形转发出去。例如,攻击者可以在存在大气波导的时候缓存一段接收信号波形,然后在大气波导不存在的时候,再把缓存的信号波形转发出去。如果不同时刻初始相位保持不变,那么接收机就无法区分真实信号,还是攻击者伪造的虚假信号,进而难以抵御转发干扰,导致网络性能下降。为了抵抗转发干扰,一种可选技术让初始相位时变。
本公开的实施例中,上述步骤11中,获取时间信息,包括:
根据计数器和/或第一时间参数,确定所述时间信息。
其中,所述计数器包括以下计数器中的至少一种:小时计数器、分钟计数器、参考信号发送周期计数器、20ms计数器、无线帧计数器、TDD上下行模式计数器、TDD上下行转换周期计数器、联合TDD上下行转换周期计数器、时隙计数器和OFDM符号计数器。
其中,所述时间信息n t采用的计数器中:TDD上下行转换周期(TDD DL/UL switching period,或TDD switching period),即单个TDD上下行模式的周期(periodicity of the TDD DL/UL pattern)。
联合TDD上下行转换周期(combined periodicity of two TDD DL/UL patterns),指的是当采用双周期帧结构时,两种帧结构所对应的单个TDD上下行模式的周期之和。例如,当采用双周期帧结构时,假设第一帧结构所对应的单个TDD上下行模式的周期为P1,第二帧结构所对应的单个TDD上下行模式的周期为P2,则联合TDD上下行转换周期=P1+P2。
其中,至少一种计数器根据预设全球卫星导航系统(Global Navigation Satellite System,GNSS)定时开始计数;且所述预设GNSS定时和所述第一时间参数通过网管OAM配置。
其中,根据计数器和/或第一时间参数,确定所述时间信息,包括:
确定所述时间信息=所述第一时间参数;或者,
确定所述时间信息=所述第二时间参数;或者,
确定所述时间信息=所述第二时间参数+所述第一时间参数;或者,
确定所述时间信息=mod(所述第二时间参数+所述第一时间参数,Z);或者,
确定所述时间信息=mod(所述第二时间参数×所述第一时间参数,Z);或者,
确定所述时间信息=mod(所述第二时间参数×所述第一时间参数+a,Z),
其中,所述第二时间参数为所述至少一种计数器,或者为所述至少一种计数器的组合形式;
所述Z和a为预设参数,或者通过OAM配置。
在一种实施例中,参数Z根据时间信息n t的最大取值周期T1确定。例如,当确定所述时间信息=mod(所述第二时间参数+所述第一时间参数,Z),且所述第二时间参数为所述至少一种计数器时,设所述时间信息n t的最大取值范围=T1=Y个所述计数器的计时单位,则Z=Y×所述计数器的计时单位;或Z=(Y+1)×所述计数器的计时单位。所述至少一种计数器的组合形式,指的是根据至少一种计数器的函数关系,计算所述时间信息,或者计算所述时间信息的某个成分。
在一种实施例中,所述第一时间信息n t=60·T hour+T minute
其中,T hour为小时计数器,T minute为分钟计数器。
在另外一种实施例中,所述第一时间信息:
Figure PCTCN2020074276-appb-000005
其中,n f为无线帧(frame)计数器,
Figure PCTCN2020074276-appb-000006
为无线帧内的slot计数器,
l为slot的OFDM符号计数器,
Figure PCTCN2020074276-appb-000007
为每个slot内OFDM符号数,
Figure PCTCN2020074276-appb-000008
为每个frame内slot数目。
例如,当时间信息nt为第一时间单位T 1的计数器时,意味着每隔T 1时 长,n t取值递增1。
同时也意味着,如果OAM配置的加扰信息集合保持不变,那么对于在第一时间单位T1内不同的时域位置偏移,所有网络设备(如基站)所发送的RS的初始相位所构成的取值集合相同;
对于不同的第一时间单位T 1,其所对应的初始相位集合不同。
因此,上述实施例能够抵抗第一时间单位T 1之间的转发干扰(repeater jamming),但是不能抵抗第一时间单位T 1之内的转发干扰(repeaterjamming)。
考虑到大气波导现象的典型持续时间为数小时,因此可选的,第一时间单位T 1的尺度应该在分钟和小时之间。
因此,分钟计数器和参考信号发送周期计数器(典型为10min~40min)为可选值。
本公开的一实施例中,步骤12具体可以包括:
步骤121,根据公式c init=(2 α·n t·(δ·n SCID+β)+γ·n SCID)mod 2 31生成伪随机序列的初始相位;其中,c init为伪随机序列的初始相位;n t为所述时间信息;n SCID为所述加扰信息;α、β、γ、δ为预设常数。
在一种实施例中,γ=1 or 2;β=0 or 0.5 or 1;δ=0 or 1;
α的取值根据n SCID的最大取值范围确定;
可选的,所述n SCID的取值范围为0≤n SCID≤N,且
Figure PCTCN2020074276-appb-000009
且α、β、γ、δ采用如下至少一种配置:
第一配置:α=M,β=0,γ=1,δ=1;
这时,c init=(2 M·n t·n SCID+n SCID)mod 2 31
第二配置:α=M+1,β=0,γ=2,δ=1;
这时,c init=(2 M+1·n t·n SCID+2n SCID)mod 2 31
第三配置:α=M+1,β=0.5,γ=1,δ=1;
这时,c init=(2 M·n t·(2n SCID+1)+n SCID)mod 2 31
第四配置:α=M+2,β=0.5,γ=2,δ=1;
这时,c init=(2 M+1·n t·(2n SCID+1)+2n SCID)mod 2 31
第五配置:α=M,β=1,γ=1,δ=0;
这时,c init=(2 M·n t+n SCID)mod 2 31
本公开的实施例中,上述步骤13具体可以包括:
根据公式:
Figure PCTCN2020074276-appb-000010
生成伪随机序列;
其中,r(m)为伪随机序列;c(i)根据如下公式生成:
c(n)=(x 1(n+N C)+x 2(n+N C))mod 2
x 1(n+31)=(x 1(n+3)+x 1(n))mod 2
x 2(n+31)=(x 2(n+3)+x 2(n+2)+x 2(n+1)+x 2(n))mod 2
且,n=0,1,...,M PN-1,M PN为伪随机序列r(m)的长度;
N C=1600;
第一个m序列x 1(n)被初始化为x 1(0)=1,x 1(n)=0,n=1,2,...,30;
第二个m序列x 2(n)的初始化值由c init确定,其中,
Figure PCTCN2020074276-appb-000011
本公开的实施例中,所述参考信号为远端干扰管理参考信号。具体的,所述远端干扰管理参考信号可以是第一类远端干扰管理参考信号(RIM RS1)、第二类远端干扰管理参考信号(RIM RS2)、承载第一类干扰抑制信息的第一类远端干扰管理参考信号(RIM RS1 for not enough mitigation)、承载第二类干扰抑制信息的第一类远端干扰管理参考信号(RIM RS1 for enough mitigation)中的任意一种。其中,承载第一类干扰抑制信息的第一类远端干扰管理参考信号指示所述第一网络设备受到远端干扰,且需要施扰站增加干扰抑制水平(即“Not enough mitigation,further actions needed”);而承载第二类干扰抑制信息的第一类远端干扰管理参考信号(RIM RS1 forenough mitigation)则指示所述第一网络设备受到远端干扰,且需要施扰站维持当前的干扰抑制水平(即“Enough mitigation,no further actions needed”)。
需要说明的是,当第一网络设备将生成的第一参考信号发送出去,位于远端的第二网络设备如果能够接收到该第一参考信号则表示存在大气波导现象。
可选的,假设第二网络设备(具体可以是远端干扰的施扰基站)在第X个上行OFDM符号中侦听到所述第一参考信号,并且第二网络设备事先已知第一网络设备(即发送第一参考信号的网络设备,具体可以是远端干扰的受 扰基站)在统一的最大下行传输边界处发送第一参考信号的下行符号位置,则第二网络设备能够推测出第一参考信号的路径传播距离。第二网络设备基于信道互异性假设,能够推测出如果自己也在相同的最大下行传输边界处发送下行数据(例如物理下行共享信道(Physical Downlink Shared Channel,PDSCH)、下行参考信号等),则其发送的下行数据将对第一通信设备最多X个上行OFDM符号造成远端干扰。因此,所述第一参考信号能够提供第一网络设备中受到远端干扰的上行OFDM符号的最大数量;X为大于或者等于1的整数。
另外,在一种实施例中,所述第一参考信号用于指示第一网络设备受到远端干扰。
在另外一种实施例中,所述第一参考信号还能承载额外的信息,如指示所述第一网络设备受到远端干扰,且需要施扰站增加干扰抑制水平(即“Not enough mitigation,further actions needed”);或者,指示所述第一网络设备受到远端干扰,且需要施扰站维持当前的干扰抑制水平(即“Enough mitigation,no further actions needed”)。
本公开的上述实施例针对相关技术中远端干扰检测参考信号(RIM-RS)的初始相位集合通过标准确定,所导致的RIM-RS易被攻击者伪装并攻击,进而导致整个网络的DL传输性能严重下降的问题,本公开的上述实施例所述的改进的RIM-RS初始相位生成方法,通过根据网络设备编号和/或参考信号的功能,查询加扰信息集合,获取获得加扰信息;根据获得的加扰信息和时间信息,生成伪随机序列的初始相位。由于运营商定期更新加扰信息集合,使得攻击者无法及时掌握加扰信息,进而攻击者难以主动生成虚假的伪随机序列;另一方面,在加扰信息集合更新周期内,由于伪随机序列的初始相位随时间变化,即不同时间段所对应的初始相位不同,因此本公开还能防备转发干扰(repeater jamming)。因此本公开可以提高网络安全性。
如图2所示,本公开的实施例还提供一种伪随机序列初始相位配置方法,应用于网管设备,所述方法包括:
步骤21,为网络设备配置如下至少一种参数,用于确定网络设备的伪随机序列初始相位,所述如下至少一种参数包括:
网络设备编号,加扰信息集合、预设GNSS定时,第一时间参数,预设参数L、Z、a。
其中,上述方法中:为第一通信设备配置加扰信息集合包括:
确定加扰信息集合的更新周期T2,使得所述T2小于或等于时间信息n t的最大取值范围T1;
根据所述T2更新加扰信息集合。
上述实施例中的所有实现方式均适用于该图2所示的实施例中,也能达到相同的技术效果。
如图3所示,本公开的实施例还提供一种网络设备30,包括:
处理器32,用于获取加扰信息和时间信息;根据所述加扰信息和时间信息,生成伪随机序列的初始相位。
其中,所述处理器32还用于根据所述初始相位生成伪随机序列。
所述处理器32还用于根据伪随机序列生成参考信号;所述参考信号为远端干扰管理参考信号或者用于指示以下中的至少一项:所述网络设备受到远端干扰,所述网络设备受到远端干扰的状态,所述网络设备中受到远端干扰的上行正交频分复用OFDM符号的最大数量,大气波导现象是否存在,所述网络设备的网络设备编号。
其中,获取加扰信息,包括:
根据网络设备编号和/或参考信号的功能,确定索引值;
根据索引值,从加扰信息集合中获得加扰信息。
其中,所述网络设备编号为网管单元、网络设备间信令配置的专用标记、国际移动用户识别码、由移动管理实体产生并维护的临时识别号、由设备制造商分配的永久标识、由核心网分配的动态标识、网络设备组标识和小区标识中的至少一种。
其中,根据网络设备编号和/或参考信号的功能,确定索引值,包括:
当所述参考信号为第一预设功能时,确定所述索引值为第一预设值;或者,
当所述参考信号为第二预设功能时,根据网络设备编号,确定第二偏移量,确定所述索引值为所述第二偏移量;或者,
根据所述参考信号的功能,确定第一偏移量,根据网络设备编号,确定第二偏移量,确定所述索引值等于第一偏移量加上第二偏移量。
其中,根据所述参考信号的功能,确定第一偏移量,包括:
如果所述参考信号为第二类参考信号,则确定第一偏移量等于0;
如果所述参考信号为第一类参考信号,且所述第一类参考信号不用于承载干扰抑制的相关信息,则确定第一偏移量等于0;
如果所述参考信号为第一类参考信号,且用于承载第一类干扰抑制信息,则确定第一偏移量等于第二预设值;
如果所述参考信号为第一类参考信号,且用于承载第二类干扰抑制信息,则确定第一偏移量等于第三预设值。
其中,所述第二预设值=0,所述第三预设值=L;或,所述第二预设值=L,所述第三预设值=0;其中,L为正整数。
其中,根据网络设备编号,确定第二偏移量,包括:
根据所述网络设备编号中的部分比特位确定第二偏移量;或者,
根据公式:
第二偏移量=mod(网络设备编号,L)确定第二偏移量,其中,L为正整数
其中,获取时间信息,包括:根据计数器和/或第一时间参数,确定所述时间信息。
其中,所述计数器包括以下计数器中的至少一种:小时计数器、分钟计数器、参考信号发送周期计数器、20ms计数器、无线帧计数器、TDD上下行模式计数器、TDD上下行转换周期计数器、联合TDD上下行转换周期计数器、时隙计数器和OFDM符号计数器。
其中,至少一种计数器根据预设全球卫星导航系统GNSS定时开始计数;且所述预设GNSS定时和所述第一时间参数通过网管OAM配置。
其中,根据计数器和/或第一时间参数,确定所述时间信息,包括:
确定所述时间信息=所述第一时间参数;或者,
确定所述时间信息=所述第二时间参数;或者,
确定所述时间信息=所述第二时间参数+所述第一时间参数;或者,
确定所述时间信息=mod(所述第二时间参数+所述第一时间参数,Z);或 者,
确定所述时间信息=mod(所述第二时间参数×所述第一时间参数,Z);或者,
确定所述时间信息=mod(所述第二时间参数×所述第一时间参数+a,Z),
其中,所述第二时间参数为所述至少一种计数器,或者为所述至少一种计数器的组合形式;
所述Z和a为预设参数,或者通过网管OAM配置
其中,根据所述加扰信息和时间信息,生成伪随机序列的初始相位,包括:
根据公式c init=(2 α·n t·(δ·n SCID+β)+γ·n SCID)mod 2 31生成伪随机序列的初始相位;其中,
c init为伪随机序列的初始相位;
n t为所述时间信息;
n SCID为所述加扰信息;
α、β、γ、δ为预设常数。
其中,γ=1 or 2;β=0 or 0.5or1;δ=0 or 1;α的取值根据n SCID的最大取值范围确定。
其中,所述n SCID的取值范围为0≤n SCID≤N,且
Figure PCTCN2020074276-appb-000012
且α、β、γ、δ采用如下至少一种配置:
第一配置:α=M,β=0,γ=1,δ=1;
第二配置:α=M+1,β=0,γ=2,δ=1;
第三配置:α=M+1,β=0.5,γ=1,δ=1;
第四配置:α=M+2,β=0.5,γ=2,δ=1;
第五配置:α=M,β=1,γ=1,δ=0。
其中,根据所述初始相位生成伪随机序列,包括:
根据公式:
Figure PCTCN2020074276-appb-000013
生成伪随机序列;
其中,r(m)为伪随机序列;c(i)根据如下公式生成:
c(n)=(x 1(n+N C)+x 2(n+N C))mod 2
x 1(n+31)=(x 1(n+3)+x 1(n))mod 2
x 2(n+31)=(x 2(n+3)+x 2(n+2)+x 2(n+1)+x 2(n))mod 2
且,n=0,1,...,M PN-1,M PN为伪随机序列r(m)的长度;
N C=1600;
第一个m序列x 1(n)被初始化为x 1(0)=1,x 1(n)=0,n=1,2,...,30;
第二个m序列x 2(n)的初始化值由c init确定,其中,
Figure PCTCN2020074276-appb-000014
该网络设备是与上述图1所示方法对应的网络设备,上述方法实施例中所有实现方式均适用于该网络设备的实施例中,也能达到相同的技术效果。该网络设备还可以进一步包括收发机31与存储器33,以及,收发机31与存储器33之间,均可以通过总线接口连接,收发机31的功能可以由处理器32实现,处理器32的功能也可以由收发机31实现。
本公开的实施例还提供一种网管设备,包括:
处理器,用于为网络设备配置如下至少一种参数,用于确定网络设备的伪随机序列初始相位,所述如下至少一种参数包括:网络设备编号,加扰信息集合、预设GNSS定时,第一时间参数。
其中,所述处理器为网络设备配置加扰信息集合时,具体用于:确定加扰信息集合的更新周期T2,使得所述T2小于或等于时间信息n t的最大取值范围T1;根据所述T2更新加扰信息集合。
本公开的实施例还提供一种计算机存储介质,包括指令,当所述指令在计算机运行时,使得计算机执行如上图1或者图2所述的方法。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本公开的范围。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本公开所提供的实施例中,应该理解到,所揭露的装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本公开各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本公开的技术方案本质上或者说对相关技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本公开各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
此外,需要指出的是,在本公开的装置和方法中,显然,各部件或各步骤是可以分解和/或重新组合的。这些分解和/或重新组合应视为本公开的等效方案。并且,执行上述系列处理的步骤可以自然地按照说明的顺序按时间顺序执行,但是并不需要一定按照时间顺序执行,某些步骤可以并行或彼此独立地执行。对本领域的普通技术人员而言,能够理解本公开的方法和装置的全部或者任何步骤或者部件,可以在任何计算装置(包括处理器、存储介质等)或者计算装置的网络中,以硬件、固件、软件或者它们的组合加以实现,这是 本领域普通技术人员在阅读了本公开的说明的情况下运用他们的基本编程技能就能实现的。
因此,本公开的目的还可以通过在任何计算装置上运行一个程序或者一组程序来实现。所述计算装置可以是公知的通用装置。因此,本公开的目的也可以仅仅通过提供包含实现所述方法或者装置的程序代码的程序产品来实现。也就是说,这样的程序产品也构成本公开,并且存储有这样的程序产品的存储介质也构成本公开。显然,所述存储介质可以是任何公知的存储介质或者将来所开发出来的任何存储介质。还需要指出的是,在本公开的装置和方法中,显然,各部件或各步骤是可以分解和/或重新组合的。这些分解和/或重新组合应视为本公开的等效方案。并且,执行上述系列处理的步骤可以自然地按照说明的顺序按时间顺序执行,但是并不需要一定按照时间顺序执行。某些步骤可以并行或彼此独立地执行。
以上所述的是本公开的可选实施方式,应当指出对于本技术领域的普通人员来说,在不脱离本公开所述的原理前提下还可以作出若干改进和润饰,这些改进和润饰也在本公开的保护范围内。

Claims (23)

  1. 一种伪随机序列初始相位的生成方法,应用于网络设备,所述方法包括:
    获取加扰信息和时间信息;
    根据所述加扰信息和时间信息,生成伪随机序列的初始相位。
  2. 根据权利要求1所述的方法,还包括:
    根据所述初始相位生成伪随机序列。
  3. 根据权利要求2所述的方法,还包括:
    根据伪随机序列生成参考信号;
    所述参考信号为远端干扰管理参考信号或者用于指示以下中的至少一项:所述网络设备受到远端干扰,所述网络设备受到远端干扰的状态,所述网络设备中受到远端干扰的上行正交频分复用OFDM符号的最大数量,大气波导现象是否存在,所述网络设备的网络设备编号。
  4. 根据权利要求1所述的方法,其中,获取加扰信息,包括:
    根据网络设备编号和/或参考信号的功能,确定索引值;
    根据索引值,从加扰信息集合中获得加扰信息。
  5. 根据权利要求3或4所述的方法,其中,所述网络设备编号为网管单元、网络设备间信令配置的专用标记、国际移动用户识别码、由移动管理实体产生并维护的临时识别号、由设备制造商分配的永久标识、由核心网分配的动态标识、网络设备组标识和小区标识中的至少一种。
  6. 根据权利要求4所述的方法,其中,根据网络设备编号和/或参考信号的功能,确定索引值,包括:
    当所述参考信号为第一预设功能时,确定所述索引值为第一预设值;或者,
    当所述参考信号为第二预设功能时,根据网络设备编号,确定第二偏移量,确定所述索引值为所述第二偏移量;或者,
    根据所述参考信号的功能,确定第一偏移量,根据网络设备编号,确定第二偏移量,确定所述索引值等于第一偏移量加上第二偏移量。
  7. 根据权利要求6所述的方法,其中,根据所述参考信号的功能,确定第一偏移量,包括:
    如果所述参考信号为第二类参考信号,则确定第一偏移量等于0;
    如果所述参考信号为第一类参考信号,且所述第一类参考信号不用于承载干扰抑制的相关信息,则确定第一偏移量等于0;
    如果所述参考信号为第一类参考信号,且用于承载第一类干扰抑制信息,则确定第一偏移量等于第二预设值;
    如果所述参考信号为第一类参考信号,且用于承载第二类干扰抑制信息,则确定第一偏移量等于第三预设值。
  8. 根据权利要求7所述的方法,其中,
    所述第二预设值=0,所述第三预设值=L;或,
    所述第二预设值=L,所述第三预设值=0;其中,L为正整数。
  9. 根据权利要求6所述的方法,其中,根据网络设备编号,确定第二偏移量,包括:
    根据所述网络设备编号中的部分比特位确定第二偏移量;或者,
    根据公式:第二偏移量=mod(网络设备编号,L)确定第二偏移量,其中,L为正整数。
  10. 根据权利要求1所述的方法,其中,获取时间信息,包括:
    根据计数器和/或第一时间参数,确定所述时间信息。
  11. 根据权利要求10所述的方法,其中,所述计数器包括以下计数器中的至少一种:
    小时计数器、分钟计数器、参考信号发送周期计数器、20ms计数器、无线帧计数器、TDD上下行模式计数器、TDD上下行转换周期计数器、联合TDD上下行转换周期计数器、时隙计数器和OFDM符号计数器。
  12. 根据权利要求11所述的方法,其中,至少一种计数器根据预设全球卫星导航系统GNSS定时开始计数;且所述预设GNSS定时和所述第一时间参数通过网管OAM配置。
  13. 根据权利要求12所述的方法,其中,根据计数器和/或第一时间参数,确定所述时间信息,包括:
    确定所述时间信息=所述第一时间参数;或者,
    确定所述时间信息=所述第二时间参数;或者,
    确定所述时间信息=所述第二时间参数+所述第一时间参数;或者,
    确定所述时间信息=mod(所述第二时间参数+所述第一时间参数,Z);或者,
    确定所述时间信息=mod(所述第二时间参数×所述第一时间参数,Z);或者,
    确定所述时间信息=mod(所述第二时间参数×所述第一时间参数+a,Z),
    其中,所述第二时间参数为所述至少一种计数器,或者为所述至少一种计数器的组合形式;
    所述Z和a为预设参数,或者通过网管OAM配置。
  14. 根据权利要求1所述的方法,其中,根据所述加扰信息和时间信息,生成伪随机序列的初始相位,包括:
    根据公式c init=(2 α·n t·(δ·n SCID+β)+γ·n SCID)mod 2 31生成伪随机序列的初始相位;其中,
    c init为伪随机序列的初始相位;
    n t为所述时间信息;
    n SCID为所述加扰信息;
    α、β、γ、δ为预设常数。
  15. 根据权利要求14所述的方法,其中,γ=1 or 2;β=0 or 0.5or1;δ=0 or 1;α的取值根据n SCID的最大取值范围确定。
  16. 根据权利要求14所述的方法,其中,所述n SCID的取值范围为0≤n SCID≤N,且
    Figure PCTCN2020074276-appb-100001
    且α、β、γ、δ采用如下至少一种配置:
    第一配置:α=M,β=0,γ=1,δ=1;
    第二配置:α=M+1,β=0,γ=2,δ=1;
    第三配置:α=M+1,β=0.5,γ=1,δ=1;
    第四配置:α=M+2,β=0.5,γ=2,δ=1;
    第五配置:α=M,β=1,γ=1,δ=0。
  17. 根据权利要求2所述的方法,其中,根据所述初始相位生成伪随机 序列,包括:
    根据公式:
    Figure PCTCN2020074276-appb-100002
    生成伪随机序列;
    其中,r(m)为伪随机序列;c(i)根据如下公式生成:
    c(n)=(x 1(n+N C)+x 2(n+N C))mod2
    x 1(n+31)=(x 1(n+3)+x 1(n))mod2
    x 2(n+31)=(x 2(n+3)+x 2(n+2)+x 2(n+1)+x 2(n))mod2
    且,n=0,1,...,M PN-1,M PN为伪随机序列r(m)的长度;
    N C=1600;
    第一个m序列x 1(n)被初始化为x 1(0)=1,x 1(n)=0,n=1,2,...,30;
    第二个m序列x 2(n)的初始化值由c init确定,其中,
    Figure PCTCN2020074276-appb-100003
  18. 一种伪随机序列初始相位配置方法,应用于网管设备,所述方法包括:
    为网络设备配置如下至少一种参数,用于确定网络设备的伪随机序列初始相位,所述如下至少一种参数包括:
    网络设备编号,加扰信息集合、预设GNSS定时,第一时间参数。
  19. 根据权利要求18所述的方法,其中,为网络设备配置加扰信息集合包括:
    确定加扰信息集合的更新周期T2,使得所述T2小于或等于时间信息n t的最大取值范围T1;
    根据所述T2更新加扰信息集合。
  20. 一种网络设备,包括:
    处理器,用于获取加扰信息和时间信息;
    根据所述加扰信息和时间信息,生成伪随机序列的初始相位。
  21. 一种网管设备,包括:
    处理器,用于为网络设备配置如下至少一种参数,用于确定网络设备的伪随机序列初始相位,所述如下至少一种参数包括:网络设备编号,加扰信息集合、预设GNSS定时,第一时间参数。
  22. 根据权利要求21所述的网管设备,其中,所述处理器为第一通信设备配置加扰信息集合时用于:确定加扰信息集合的更新周期T2,使得所述T2 小于或等于时间信息n t的最大取值范围T1;根据所述T2更新加扰信息集合。
  23. 一种计算机存储介质,包括指令,当所述指令在计算机运行时,使得计算机执行如权利要求1至17任一项所述的方法或者如权利要求18或19所述的方法。
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