WO2018126472A1 - 信息搜索方法、信息发送方法、装置及系统 - Google Patents

信息搜索方法、信息发送方法、装置及系统 Download PDF

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Publication number
WO2018126472A1
WO2018126472A1 PCT/CN2017/070612 CN2017070612W WO2018126472A1 WO 2018126472 A1 WO2018126472 A1 WO 2018126472A1 CN 2017070612 W CN2017070612 W CN 2017070612W WO 2018126472 A1 WO2018126472 A1 WO 2018126472A1
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WIPO (PCT)
Prior art keywords
frequency domain
domain resource
block information
synchronization block
information
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PCT/CN2017/070612
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English (en)
French (fr)
Inventor
刘洋
Original Assignee
北京小米移动软件有限公司
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Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to CN201780000011.1A priority Critical patent/CN106797611B/zh
Priority to PCT/CN2017/070612 priority patent/WO2018126472A1/zh
Publication of WO2018126472A1 publication Critical patent/WO2018126472A1/zh

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    • 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
    • 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
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/0008—Wavelet-division

Definitions

  • the present disclosure relates to the field of wireless communication technologies, and in particular, to an information search method, an information transmission method, apparatus, and system.
  • the low-latency service refers to a service that requires less end-to-end delay when communicating between the terminal and other devices. For example, in the driverless business, the required end-to-end delay is about 1ms.
  • the terminal establishes a connection with the physical cell as the first link between the terminal and other devices, and the required delay should also be small.
  • the base station occupies a frequency domain resource in the middle of the working frequency band of the system to send a synchronization signal
  • the synchronization signal includes a PSS (Primary Synchronization Signal) and a Secondary Synchronization Signal (SSS), and the PSS is transmitted.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • the time domain location in which the base station transmits the PSS and SSS in the time unit of the SSS is fixed.
  • the terminal When the terminal needs to establish a connection with the physical cell, the terminal first scans the search at the frequency domain resource in the middle of the working frequency band of the system.
  • the terminal After searching for the PSS or SSS, the terminal acquires the SSS or PSS in the corresponding time domain location, and according to the PSS and The SSS decodes a PCI (Physical Cell Identifier) and then establishes a connection with the physical cell corresponding to the PCI.
  • PCI Physical Cell Identifier
  • Embodiments of the present disclosure provide an information search method, an information transmission method, apparatus, and system.
  • the technical solution is as follows:
  • an information search method comprising:
  • n is an integer greater than one
  • the access network device And searching, according to the location, the synchronization block information that is sent by the access network device by using the frequency domain resources of the n different subcarrier intervals; wherein the synchronization block is sent by using a frequency domain resource with each seed carrier interval Within the time unit of information, the access network device transmits the synchronization block information at least once.
  • the frequency domain resources of the n different subcarrier intervals include a frequency domain resource of a first subcarrier interval and a frequency domain resource of a second subcarrier interval; and the frequency domain resource of the first subcarrier interval corresponds to
  • the carrier center is located at one third of the working frequency band of the system; the carrier center corresponding to the frequency domain resource of the second subcarrier interval is located at two-thirds of the working frequency band of the system.
  • the frequency domain resources of the n different subcarrier intervals include a frequency domain resource of a first subcarrier interval, a frequency domain resource of a second subcarrier interval, and a frequency domain resource of a third subcarrier interval;
  • the carrier center corresponding to the frequency domain resource of one subcarrier interval is located at a quarter position of the working frequency band of the system;
  • the carrier center corresponding to the frequency domain resource of the second subcarrier interval is located at a quarter of the working frequency band of the system The second location;
  • the carrier center corresponding to the frequency domain resource of the third subcarrier interval is located at three quarters of the working frequency band of the system.
  • the access network device sends the synchronization block information once in a time unit that uses the frequency domain resource of each seed carrier interval to send the synchronization block information.
  • the method further includes:
  • a method for transmitting information comprising:
  • sync block information refers to information used by the terminal to access the radio access network
  • the sync block information is once, and the n is an integer greater than 1.
  • the frequency domain resources of the n different subcarrier intervals include a frequency domain resource of a first subcarrier interval and a frequency domain resource of a second subcarrier interval; and the frequency domain resource of the first subcarrier interval corresponds to
  • the carrier center is located at one third of the working frequency band of the system; the carrier center corresponding to the frequency domain resource of the second subcarrier interval is located at two-thirds of the working frequency band of the system.
  • the frequency domain resources of the n different subcarrier intervals include a frequency domain resource of a first subcarrier interval, a frequency domain resource of a second subcarrier interval, and a frequency domain resource of a third subcarrier interval;
  • the carrier center corresponding to the frequency domain resource of one subcarrier interval is located at a quarter position of the working frequency band of the system;
  • the carrier center corresponding to the frequency domain resource of the second subcarrier interval is located at a quarter of the working frequency band of the system The second location;
  • the carrier center corresponding to the frequency domain resource of the third subcarrier interval is located at three quarters of the working frequency band of the system.
  • the synchronization block information is sent once in a time unit that uses the frequency domain resource of each seed carrier interval to send the synchronization block information.
  • the synchronization block information is used in a symbol location occupied by a time unit corresponding to a frequency domain resource of the target subcarrier interval, and is used to indicate that the access network device uses the system broadcast information.
  • Frequency domain resources are used in a symbol location occupied by a time unit corresponding to a frequency domain resource of the target subcarrier interval, and is used to indicate that the access network device uses the system broadcast information.
  • an information search apparatus comprising:
  • a location acquisition module configured to acquire a location of a frequency domain resource of the n different subcarrier intervals used by the access network device to send the synchronization block information, where the synchronization block information is used for the terminal to access the wireless Information about the access network, where n is an integer greater than one;
  • the information search module is configured to search, according to the location, the synchronization block information that is sent by the access network device by using the frequency domain resources of the n different subcarrier intervals; wherein, the frequency of each seed carrier interval is adopted.
  • the frequency domain resources of the n different subcarrier intervals include a frequency domain resource of a first subcarrier interval and a frequency domain resource of a second subcarrier interval; and the frequency domain resource of the first subcarrier interval corresponds to
  • the carrier center is located at one third of the working frequency band of the system; the carrier center corresponding to the frequency domain resource of the second subcarrier interval is located at two-thirds of the working frequency band of the system.
  • the frequency domain resources of the n different subcarrier intervals include a frequency domain resource of a first subcarrier interval, a frequency domain resource of a second subcarrier interval, and a frequency domain resource of a third subcarrier interval;
  • the carrier center corresponding to the frequency domain resource of one subcarrier interval is located at a quarter position of the working frequency band of the system;
  • the carrier center corresponding to the frequency domain resource of the second subcarrier interval is located at a quarter of the working frequency band of the system The second location;
  • the carrier center corresponding to the frequency domain resource of the third subcarrier interval is located at three quarters of the working frequency band of the system.
  • the access network device sends the synchronization block information once in a time unit that uses the frequency domain resource of each seed carrier interval to send the synchronization block information.
  • the device further includes:
  • a configuration determining module configured to: after searching for the synchronization block information that is sent by the access network device by using a frequency domain resource of a target subcarrier interval, according to the synchronization block information, in a frequency domain of the target subcarrier interval And determining, by the resource, a symbol position occupied by a time unit that sends the synchronization block information, and determining a transmission configuration of the system broadcast information;
  • the frequency domain determining module is configured to determine, according to the sending configuration, a frequency domain resource used by the access network device when sending the system broadcast information;
  • the information acquiring module is configured to acquire the system broadcast information sent by the access network device according to the determined frequency domain resource scan.
  • an information transmitting apparatus comprising:
  • An information generating module configured to generate synchronization block information, where the synchronization block information refers to information used by the terminal to access the wireless access network;
  • the information sending module is configured to send the synchronization block information by using frequency domain resources with different sub-carrier spacings in the working frequency band of the system, where the synchronization block information is sent in a frequency domain resource with each seed carrier interval Within the time unit, the synchronization block information is transmitted at least once, and the n is an integer greater than one.
  • the frequency domain resources of the n different subcarrier intervals include a frequency domain resource of a first subcarrier interval and a frequency domain resource of a second subcarrier interval; and the frequency domain resource of the first subcarrier interval corresponds to
  • the carrier center is located at one third of the working frequency band of the system; the carrier center corresponding to the frequency domain resource of the second subcarrier interval is located at two-thirds of the working frequency band of the system.
  • the frequency domain resources of the n different subcarrier intervals include a frequency domain resource of a first subcarrier interval, a frequency domain resource of a second subcarrier interval, and a frequency domain resource of a third subcarrier interval;
  • the carrier center corresponding to the frequency domain resource of one subcarrier interval is located at a quarter position of the working frequency band of the system;
  • the carrier center corresponding to the frequency domain resource of the second subcarrier interval is located at a quarter of the working frequency band of the system The second location;
  • the carrier center corresponding to the frequency domain resource of the third subcarrier interval is located at three quarters of the working frequency band of the system.
  • the synchronization block information is sent once in a time unit that uses the frequency domain resource of each seed carrier interval to send the synchronization block information.
  • the synchronization block information is used in a symbol location occupied by a time unit corresponding to a frequency domain resource of the target subcarrier interval, and is used to indicate that the access network device uses the system broadcast information.
  • Frequency domain resources are used in a symbol location occupied by a time unit corresponding to a frequency domain resource of the target subcarrier interval, and is used to indicate that the access network device uses the system broadcast information.
  • a communication system comprising: a terminal and an access network device;
  • the terminal includes the apparatus of the third aspect
  • the access network device comprises the apparatus of the fourth aspect.
  • an information search apparatus comprising:
  • a memory for storing executable instructions of the processor
  • processor is configured to:
  • n is an integer greater than one
  • the access network device And searching, according to the location, the synchronization block information that is sent by the access network device by using the frequency domain resources of the n different subcarrier intervals; wherein the synchronization block is sent by using a frequency domain resource with each seed carrier interval Within the time unit of information, the access network device transmits the synchronization block information at least once.
  • an information transmitting apparatus comprising:
  • a memory for storing executable instructions of the processor
  • processor is configured to:
  • sync block information refers to information used by the terminal to access the radio access network
  • the sync block information is once, and the n is an integer greater than 1.
  • the access network device uses the frequency domain resources of different subcarrier spacings to send the synchronization block information.
  • the related technology can only adopt one device for the access network device.
  • a fixed subcarrier spacing frequency domain resource sends a synchronization signal, which causes the access network device to continuously transmit two synchronization signals with a longer time interval, so the terminal searches for the synchronization signal and completes the problem of long time accessing the cell;
  • the time interval for the access network device to continuously send two synchronization signals is shortened, so that the time for the terminal to search for the synchronization signal is also shortened, thereby reducing the terminal accessing the physical cell. Delay.
  • FIG. 1 is a schematic diagram of an application scenario according to an exemplary embodiment
  • 2A is a flowchart of an information search method according to an exemplary embodiment
  • 2B/2C/2D are schematic diagrams showing transmission of sync block information, according to an exemplary embodiment
  • FIG. 3 is a block diagram of an information search apparatus according to an exemplary embodiment
  • FIG. 4 is a block diagram of an information search apparatus according to another exemplary embodiment
  • FIG. 5 is a block diagram of an information transmitting apparatus according to an exemplary embodiment
  • FIG. 6 is a block diagram of an access network device according to an exemplary embodiment
  • FIG. 7 is a block diagram of a terminal, according to an exemplary embodiment.
  • the network architecture and the service scenario described in the embodiments of the present disclosure are intended to more clearly illustrate the technical solutions of the embodiments of the present disclosure, and do not constitute a limitation of the technical solutions provided by the embodiments of the present disclosure.
  • the evolution of the new business scenario and the technical solution provided by the embodiments of the present disclosure are equally applicable to similar technical problems.
  • FIG. 1 is a schematic diagram of an application scenario according to an exemplary embodiment.
  • the application scenario may be a mobile communication system, which may be a 5G (5th Generation) system.
  • the application scenario includes: the terminal 110 and the access network device 120.
  • the number of terminals 110 may be one or more.
  • the number of access network devices 120 may also be one or more.
  • Each access network device 120 manages one or more physical cells, distributed within each physical cell One or more terminals 120.
  • the access network device 120 and the terminal 110 establish a wireless connection through a wireless air interface (which may also be referred to as an air interface or an air interface).
  • a wireless air interface is a wireless air interface based on the fifth generation mobile communication network technology (5G) standard, for example, the wireless air interface is NR (New Radio); or the wireless air interface may be based on 5G. Wireless air interface for the next generation of mobile communication network technology standards.
  • 5G fifth generation mobile communication network technology
  • NR New Radio
  • Wireless air interface for the next generation of mobile communication network technology standards.
  • a plurality of terminals 110 and/or multiple access network devices 120 may be included, and one terminal 110 and one access network device 120 are illustrated in FIG. 1 , but the present disclosure The embodiment does not limit this.
  • the terminal involved in the embodiments of the present disclosure may include various handheld devices having wireless communication functions, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to the wireless modem, and various forms of user equipment (User Equipment) , UE), mobile station (MS), terminal device, and the like.
  • User Equipment User Equipment
  • UE User Equipment
  • MS mobile station
  • terminals the devices mentioned above are collectively referred to as terminals.
  • the access network device in the RAN (Radio Access Network) of the embodiment of the present disclosure may be a base station (BS), and the base station is deployed in the RAN to provide wireless for the terminal.
  • the base station may include various forms of macro base stations, micro base stations, relay stations, access points, and the like.
  • the names of devices with base station functions may be different, for example, in an LTE system, called an evolved NodeB (eNB or eNodeB), in a 3G communication system. Medium, called Node B (Node B) and so on.
  • eNB evolved NodeB
  • Node B Node B
  • the name "base station” may change.
  • the foregoing apparatus for providing a wireless communication function to a terminal is collectively referred to as an access network device.
  • the access network device can only transmit the synchronization signal by using the frequency domain resource of the fixed subcarrier spacing, resulting in continuous access network equipment.
  • the time interval for transmitting two synchronization signals is long, so it takes a long time for the terminal to search for the synchronization signal and complete the cell access.
  • multiple different subcarrier spacings are supported in the working frequency band of the system, and the access network device uses multiple frequency domain resources with different subcarrier spacings to transmit synchronization signals, thereby shortening the continuous transmission of two synchronization signals.
  • the time interval is such that the time for the terminal to search for the synchronization signal is also shortened accordingly, thereby reducing the delay of the terminal accessing the physical cell.
  • FIG. 2A is a flowchart of an information search method according to an exemplary embodiment. The method can be applied to the application scenario shown in FIG. 1. The method can include the following steps.
  • step 201 the access network device generates synchronization block information.
  • the sync block information refers to information used for the terminal to access the radio access network.
  • the synchronization block information refers to information used by the terminal to acquire the physical cell identifier, complete the downlink synchronization, and the cell access.
  • the physical cell identifier refers to an identifier corresponding to a physical cell managed by the access network device. Completing downlink synchronization is a prerequisite for cell access.
  • Cell access refers to establishing a wireless connection between a terminal and a physical cell managed by an access network device.
  • the sync block information includes a sync signal and a broadcast signal.
  • the synchronization signal includes a primary synchronization signal and a secondary synchronization signal.
  • the synchronization signal is used by the terminal to acquire the physical cell identifier and complete the downlink synchronization.
  • the primary synchronization signal is used to transmit the intra-group identifier in the physical cell identifier
  • the secondary synchronization signal is used to transmit the group identifier in the physical cell identifier
  • the primary synchronization signal and the secondary synchronization signal cooperate to uniquely identify the physical cell.
  • the broadcast signal is used by the terminal to obtain related information for implementing cell access.
  • the sync block information is a sync signal.
  • step 202 in the working frequency band of the system, the access network device sends the synchronization block information by using frequency domain resources with different subcarrier spacings, where n is an integer greater than 1.
  • the system working frequency band refers to the frequency range supported by the access network device and the mobile communication system where the terminal is located.
  • the system operating frequency bands are pre-allocated by the relevant standards organizations.
  • the system operating frequency band may be 2.3 GHz to 2.4 GHz, or may be 20 GHz to 22 GHz, and the like.
  • frequency domain resources of a plurality of different subcarrier spacings are supported within a system operating frequency band.
  • frequency domain resources supporting two different subcarrier spacings of 15 kHz and 30 kHz are supported.
  • the specific value of each seed carrier interval is not limited, and may be preset according to actual conditions.
  • the frequency bands occupied by the frequency domain resources of any two different subcarriers do not overlap each other.
  • the synchronization block information is transmitted at least once in a time unit in which the synchronization block information is transmitted using the frequency domain resource of each seed carrier interval.
  • the time unit for transmitting the synchronization block information by using the frequency domain resource of the seed carrier interval may be continuous or discontinuous in the time domain.
  • the division manner of the above-described time unit may be preset according to actual conditions, for example, one time unit is one subframe, that is, 1 ms.
  • one time unit as one subframe is one subframe, that is, 1 ms.
  • frequency domain resource transmission synchronization using the seed carrier interval is used.
  • the adjacent two subframes of the block information are separated by 4 subframes.
  • the value of the number n of different subcarrier spacings supported in the working frequency band of the system is not limited, and may be preset according to actual conditions.
  • the value of n is determined correspondingly according to the number of types of services supported by the mobile communication system.
  • the value of n is 2, that is, the frequency domain resource supporting two different subcarrier intervals in the working frequency band of the system, where one subcarrier spacing frequency domain resource is used for the terminal that serves the low delay service requirement.
  • the frequency domain resource of another seed carrier interval is used for a terminal that serves non-low latency service requirements.
  • n has a value of 3, that is, a frequency domain resource supporting three different subcarrier intervals in a working frequency band of the system, where the frequency domain resource of the first seed carrier interval is used for service enhanced mobile broadband (enhanced Mobile Broadband, eMBB)
  • the terminal of the service requirement, the frequency domain resource of the second seed carrier interval is used for the terminal that serves the mass machine-type communication (mMTC) service demand, and the frequency domain resource of the third seed carrier interval is used.
  • mMTC mass machine-type communication
  • URLLC Ultra-relaible and Low Latency Communication
  • the carrier center position corresponding to the frequency domain resource of each seed carrier interval may be preset.
  • the frequency domain resources of the n different subcarrier intervals include the frequency domain resources of the first subcarrier interval and the frequency domain resources of the second subcarrier interval.
  • the carrier center corresponding to the frequency domain resource of the first subcarrier interval is located at one third of the working frequency band of the system, and the carrier center corresponding to the frequency domain resource of the second subcarrier interval is located at two thirds of the working frequency band of the system.
  • FIG. 2B a schematic diagram of an access network device transmitting synchronization block information using frequency domain resources of two different subcarrier spacings is exemplarily shown.
  • the first subcarrier spacing is 15 kHz
  • the carrier center corresponding to the frequency domain resource with the subcarrier spacing of 15 kHz is located at one third of the working frequency band of the system, and the access network device adopts the frequency domain with the subcarrier spacing of 15 kHz.
  • the synchronization block information is sent once; the second subcarrier spacing is 30 kHz, and the carrier center corresponding to the frequency domain resource with the subcarrier spacing of 30 kHz is located at two-thirds of the working frequency band of the system,
  • the network access device transmits the synchronization block information twice in a time unit in which the synchronization block information is transmitted by using the frequency domain resource with the subcarrier spacing of 30 kHz.
  • a black rectangular block is used to indicate a time-frequency resource block in which synchronization block information is transmitted.
  • the frequency domain resources of the n different subcarrier intervals include a frequency domain resource of the first subcarrier interval, a frequency domain resource of the second subcarrier interval, and The frequency domain resource of the third subcarrier interval.
  • the carrier center corresponding to the frequency domain resource of the first subcarrier interval is located in the system One quarter of the working frequency band, the carrier center corresponding to the frequency domain resource of the second subcarrier interval is located at two-quarters of the working frequency band of the system (ie, the central position), and the frequency domain resource corresponding to the third subcarrier interval corresponds to The carrier center is located at three-quarters of the operating band of the system.
  • FIG. 2C a schematic diagram of an access network device transmitting synchronization block information using frequency domain resources of three different subcarrier spacings is exemplarily shown.
  • the first subcarrier spacing is 15 kHz
  • the carrier center corresponding to the frequency domain resource with the subcarrier spacing of 15 kHz is located at a quarter of the working frequency band of the system, and the access network device adopts the frequency domain with the subcarrier spacing of 15 kHz.
  • the synchronization block information is sent once; the second subcarrier spacing is 30 kHz, and the carrier center corresponding to the frequency domain resource with the subcarrier spacing of 30 kHz is located at two quarters of the working frequency band of the system,
  • the network access device sends the synchronization block information twice in a time unit that uses the frequency domain resource with the subcarrier spacing of 30 kHz to transmit the synchronization block information.
  • the third subcarrier interval is 60 kHz, and the subcarrier spacing is 60 kHz.
  • the carrier center is located at three-quarters of the working frequency band of the system, and the access network device transmits the synchronization block information four times in a time unit that uses the frequency domain resource with the sub-carrier spacing of 60 kHz to transmit the synchronization block information.
  • a black rectangular block is used to indicate a time-frequency resource block in which synchronization block information is transmitted.
  • the location of the carrier center corresponding to the frequency domain resource for each seed carrier interval in the system operating frequency band is only exemplary and explanatory. In practical applications, it may be preset according to actual conditions, only It is necessary to ensure that the frequency bands occupied by the frequency domain resources of any two different subcarrier intervals do not overlap each other in the frequency domain resources of the n different subcarrier spacings.
  • the time of transmitting the synchronization block information by using one of the subcarrier spacing frequency domain resources is different from that of another seed carrier.
  • the time of the frequency domain resource to send the synchronization block information is not exactly the same. In the above manner, the time for transmitting the synchronization block information is shifted as much as possible, so that the transmission time of the synchronization block information is relatively evenly distributed, and the efficiency of the terminal searching for the synchronization block information is ensured.
  • the access network device sends the synchronization block information once in a time unit that uses the frequency domain resource of each seed carrier interval to send the synchronization block information.
  • the time-frequency resources of the system can be saved, and the diversity gain can also be provided.
  • FIG. 2D another exemplary diagram of an access network device transmitting synchronization block information using frequency domain resources of two different subcarrier spacings is exemplarily shown.
  • the first subcarrier interval is 15 kHz
  • the access network device sends the synchronization block information in a time unit that uses the frequency domain resource with the subcarrier spacing of 15 kHz to transmit the synchronization block information;
  • the second subcarrier interval is 30 kHz
  • the network access device also sends the same time in the time unit in which the synchronization block information is transmitted by using the frequency domain resource with the subcarrier spacing of 30 kHz.
  • Step block information The black rectangular block is used to indicate a time-frequency resource block for transmitting synchronization block information.
  • the length of time corresponding to the symbol occupied by the time-frequency resource block in the time domain is not limited, and may be related to the standard.
  • the symbol position occupied by the frequency domain resource using the subcarrier spacing to transmit the synchronization block information is not limited, and may be pre-defined by the relevant standard organization.
  • step 203 the terminal acquires the location of the frequency domain resource of the n different subcarrier intervals used by the access network device to send the synchronization block information in the system working frequency band.
  • the position of the frequency domain resource of each seed carrier interval in the system working frequency band refers to the position of the carrier center corresponding to the frequency domain resource of the subcarrier interval in the system working frequency band.
  • the number n of different subcarrier spacings corresponding to the frequency domain resources used by the access network device to send the synchronization block information, and the location of the frequency domain resources of each seed carrier interval in the system working frequency band, may be pre-stored in the terminal.
  • the configuration information may also be notified to the terminal by the access network device.
  • step 204 the terminal searches for the synchronization block information sent by the access network device using the frequency domain resources of n different subcarrier intervals according to the foregoing location.
  • the terminal After acquiring the foregoing location, the terminal acquires the frequency band used by the access network device to send the synchronization block information, and the terminal scans the search synchronization block information in the foregoing frequency band.
  • the terminal may separately search for the synchronization signal at multiple locations in the working frequency band of the system, and first search for the synchronization signal at any position first, and other frequency domain resources with the same frequency and different subcarrier spacing. The position of the synchronization signal on the above is relatively fixed, thereby improving the search efficiency.
  • the method provided by the embodiment of the present disclosure provides a plurality of different subcarrier spacings in a working frequency band of the system, and the access network device sends the synchronization block information by using frequency domain resources with different subcarrier spacings.
  • the access network device can only use a fixed subcarrier spacing frequency domain resource to send a synchronization signal, so that the time interval for the access network device to continuously send two synchronization signals is longer, so the terminal searches for the synchronization signal and The time-consuming problem of completing the cell access is shortened; the time interval for the access network device to continuously transmit the two synchronization signals is shortened, so that the time for the terminal to search for the synchronization signal is also shortened accordingly, thereby reducing the delay of the terminal accessing the physical cell.
  • the access network device sends the synchronization block information once, which can save the time-frequency resources of the system, and can also provide the diversity gain.
  • the method may further include the following steps:
  • the terminal After searching for the synchronization block information sent by the access network device using the frequency domain resource of the target subcarrier interval, the terminal sends the synchronization block information corresponding to the frequency domain resource of the target subcarrier interval according to the synchronization block information.
  • the symbol position occupied within the system determines the transmission configuration of the system broadcast information.
  • the terminal determines, according to the sending configuration, a frequency domain resource used by the access network device when transmitting the system broadcast information.
  • the terminal acquires system broadcast information sent by the access network device according to the determined frequency domain resource scan.
  • the target subcarrier spacing is a predetermined subcarrier spacing.
  • the target subcarrier spacing is the largest subcarrier spacing.
  • the synchronization block information is used in the symbol location occupied by the time unit of the target subcarrier interval corresponding to the frequency domain resource for transmitting the synchronization block information, and is used to indicate the transmission configuration of the system broadcast information.
  • the system broadcast information refers to the necessary information for completing the physical cell access, such as system bandwidth, system frame number, PHICH (Physical Hybrid-ARQ Indicator Channel) configuration information, and the like.
  • the target subcarrier spacing as a 30 kHz subcarrier spacing as an example, if the synchronization block information is in the symbol position occupied by the time domain element of the 30 kHz subcarrier interval corresponding to the frequency domain resource transmitting the synchronization block information.
  • the first two symbols indicate that the access network device sends the system broadcast information on the frequency domain resources of the two different subcarrier intervals; if the synchronization block information is sent in the frequency domain resource of the 30 kHz subcarrier interval, the synchronization block is sent.
  • the symbol position occupied by the time unit of the information is the last two symbols, indicating that the access network device transmits the system broadcast information only on the frequency domain resource of the 15 kHz subcarrier interval.
  • the terminal may The sending configuration determines the frequency domain resources used by the access network device to transmit the system broadcast information, thereby improving the efficiency of the terminal searching for the system broadcast information.
  • FIG. 3 is a block diagram of an information search apparatus according to an exemplary embodiment.
  • the device has a function of implementing the above-described terminal side method example, and the function may be implemented by hardware or by hardware The corresponding software implementation.
  • the apparatus may include a location acquisition module 301 and an information search module 302.
  • the location obtaining module 301 is configured to acquire a location of a frequency domain resource of the n different subcarrier intervals used by the access network device to send the synchronization block information, where the synchronization block information is used for terminal access.
  • Information of the radio access network where n is an integer greater than one.
  • the information search module 302 is configured to search, according to the location, the synchronization block information that is sent by the access network device by using the frequency domain resources of the n different subcarrier intervals, where each seed carrier interval is adopted. And within the time unit in which the frequency domain resource sends the synchronization block information, the access network device sends the synchronization block information at least once.
  • the apparatus configures a plurality of different subcarrier spacings in a working frequency band of the system, and the access network device sends the synchronization block information by using frequency domain resources with different subcarrier spacings.
  • the access network device can only use a fixed subcarrier spacing frequency domain resource to send a synchronization signal, so that the time interval for the access network device to continuously send two synchronization signals is longer, so the terminal searches for the synchronization signal and
  • the time-consuming problem of completing the cell access is shortened; the time interval for the access network device to continuously transmit the two synchronization signals is shortened, so that the time for the terminal to search for the synchronization signal is also shortened accordingly, thereby reducing the delay of the terminal accessing the physical cell.
  • the frequency domain resources of the n different subcarrier intervals include a frequency domain resource of a first subcarrier interval and a frequency domain resource of a second subcarrier interval;
  • the carrier center corresponding to the frequency domain resource of the first subcarrier interval is located at one third of the working frequency band of the system; and the carrier center corresponding to the frequency domain resource of the second subcarrier interval is located in the working frequency band of the system. Two-thirds position.
  • the frequency domain resources of the n different subcarrier intervals include a frequency domain resource of a first subcarrier interval, and a frequency domain resource of a second subcarrier spacing. And a frequency domain resource that is separated from the third subcarrier; the carrier center corresponding to the frequency domain resource of the first subcarrier interval is located at a quarter position of the working frequency band of the system; and the frequency domain resource of the second subcarrier interval The corresponding carrier center is located at two-quarters of the working frequency band of the system; the carrier center corresponding to the frequency domain resource of the third sub-carrier interval is located at three-quarters of the working frequency band of the system.
  • the access network device sends the time unit in a time unit that transmits the synchronization block information by using a frequency domain resource of each seed carrier interval. Synchronize block information.
  • the apparatus further includes: a configuration determining module 303, a frequency domain determining module 304, and an information acquiring module 305.
  • the configuration determining module 303 is configured to: after searching, by the access network device, the synchronization block information that is sent by the frequency domain resource of the target subcarrier interval, according to the synchronization block information, the frequency of the target subcarrier interval.
  • the symbol position occupied in the time unit of the synchronization block information corresponding to the domain resource determines the transmission configuration of the system broadcast information.
  • the frequency domain determining module 304 is configured to determine, according to the sending configuration, a frequency domain resource used by the access network device when transmitting the system broadcast information.
  • the information obtaining module 305 is configured to acquire the system broadcast information sent by the access network device according to the determined frequency domain resource scan.
  • FIG. 5 is a block diagram of an information transmitting apparatus according to an exemplary embodiment.
  • the device has a function of implementing the above-mentioned example of the method of the access network device side, and the function may be implemented by hardware or may be implemented by hardware by executing corresponding software.
  • the apparatus may include an information generating module 501 and an information transmitting module 502.
  • the information generating module 501 is configured to generate synchronization block information, where the synchronization block information refers to information for the terminal to access the wireless access network.
  • the information sending module 502 is configured to send the synchronization block information by using frequency domain resources with different sub-carrier spacings in a working frequency band of the system, where the synchronization block is sent in a frequency domain resource with each seed carrier interval.
  • the synchronization block information is transmitted at least once, and the n is an integer greater than one.
  • the apparatus configures a plurality of different subcarrier spacings in a working frequency band of the system, and the access network device sends the synchronization block information by using frequency domain resources with different subcarrier spacings.
  • the access network device can only use a fixed subcarrier spacing frequency domain resource to send a synchronization signal, so that the time interval for the access network device to continuously send two synchronization signals is longer, so the terminal searches for the synchronization signal and
  • the time-consuming problem of completing the cell access is shortened; the time interval for the access network device to continuously transmit the two synchronization signals is shortened, so that the time for the terminal to search for the synchronization signal is also shortened accordingly, thereby reducing the delay of the terminal accessing the physical cell.
  • the frequency domain resources of the n different subcarrier intervals include a frequency domain resource of a first subcarrier interval and a frequency domain resource of a second subcarrier spacing.
  • the carrier center corresponding to the frequency domain resource of the first subcarrier interval is located at one third of the working frequency band of the system; the carrier center corresponding to the frequency domain resource of the second subcarrier interval is located in the working frequency band of the system Two-thirds position.
  • the frequency domain resources of the n different subcarrier intervals include a frequency domain resource of a first subcarrier interval and a frequency domain of a second subcarrier interval.
  • a frequency domain resource with a third subcarrier spacing a carrier center corresponding to the frequency domain resource of the first subcarrier interval is located at a quarter of a working frequency band of the system; and a frequency domain of the second subcarrier spacing
  • the carrier center corresponding to the resource is located at two-quarters of the working frequency band of the system; the carrier center corresponding to the frequency domain resource of the third sub-carrier interval is located at three-quarters of the working frequency band of the system.
  • the synchronization block information is sent once in a time unit in which the synchronization block information is transmitted using a frequency domain resource of each seed carrier interval.
  • the synchronization block information is used in a symbol position occupied by a time unit corresponding to a frequency domain resource of a target subcarrier interval and transmitting the synchronization block information.
  • the frequency domain resource used by the access network device to transmit system broadcast information.
  • An exemplary embodiment of the present disclosure also provides a wireless network access system (or communication system), the system comprising: a terminal and an access network device.
  • the terminal includes an information search device as provided in the embodiment shown in FIG. 3 or based on any of the alternative embodiments provided by the embodiment shown in FIG.
  • the access network device comprises an information transmitting device as provided in the embodiment shown in FIG. 5 or based on any of the alternative embodiments provided in the embodiment shown in FIG. 5.
  • An exemplary embodiment of the present disclosure also provides an information search apparatus capable of implementing the information search method provided by the present disclosure.
  • the apparatus includes a processor and a memory for storing executable instructions of the processor.
  • the processor is configured to:
  • n is an integer greater than one
  • the access network device And searching, according to the location, the synchronization block information that is sent by the access network device by using the frequency domain resources of the n different subcarrier intervals; wherein the synchronization block is sent by using a frequency domain resource with each seed carrier interval Within the time unit of information, the access network device transmits the synchronization block information at least once.
  • the frequency domain resources of the n different subcarrier intervals include a frequency domain resource of a first subcarrier interval and a frequency domain resource of a second subcarrier interval; and the frequency domain resource of the first subcarrier interval corresponds to
  • the carrier center is located at one third of the working frequency band of the system; the carrier center corresponding to the frequency domain resource of the second subcarrier interval is located at two-thirds of the working frequency band of the system.
  • the frequency domain resources of the n different subcarrier intervals include a frequency domain resource of a first subcarrier interval, a frequency domain resource of a second subcarrier interval, and a frequency domain resource of a third subcarrier interval;
  • the carrier center corresponding to the frequency domain resource of one subcarrier interval is located at a quarter position of the working frequency band of the system;
  • the carrier center corresponding to the frequency domain resource of the second subcarrier interval is located at a quarter of the working frequency band of the system The second location;
  • the carrier center corresponding to the frequency domain resource of the third subcarrier interval is located at three quarters of the working frequency band of the system.
  • the access network device sends the synchronization block information once in a time unit that uses the frequency domain resource of each seed carrier interval to send the synchronization block information.
  • the processor is further configured to:
  • An exemplary embodiment of the present disclosure also provides an information transmitting apparatus capable of implementing the information transmitting method provided by the present disclosure.
  • the apparatus includes a processor and a memory for storing executable instructions of the processor.
  • the processor is configured to:
  • sync block information refers to information used by the terminal to access the radio access network
  • the sync block information is once, and the n is an integer greater than 1.
  • the frequency domain resources of the n different subcarrier intervals include a frequency domain resource of a first subcarrier interval and a frequency domain resource of a second subcarrier interval; and the frequency domain resource of the first subcarrier interval corresponds to
  • the carrier center is located at one third of the working frequency band of the system; the carrier center corresponding to the frequency domain resource of the second subcarrier interval is located at two-thirds of the working frequency band of the system.
  • the frequency domain resources of the n different subcarrier intervals include a frequency domain resource of a first subcarrier interval, a frequency domain resource of a second subcarrier interval, and a frequency domain resource of a third subcarrier interval;
  • the carrier center corresponding to the frequency domain resource of one subcarrier interval is located at a quarter position of the working frequency band of the system;
  • the carrier center corresponding to the frequency domain resource of the second subcarrier interval is located at a quarter of the working frequency band of the system The second location;
  • the carrier center corresponding to the frequency domain resource of the third subcarrier interval is located at three quarters of the working frequency band of the system.
  • the synchronization block information is sent once in a time unit that uses the frequency domain resource of each seed carrier interval to send the synchronization block information.
  • the synchronization block information is used in a symbol location occupied by a time unit corresponding to a frequency domain resource of the target subcarrier interval, and is used to indicate that the access network device uses the system broadcast information.
  • Frequency domain resources are used in a symbol location occupied by a time unit corresponding to a frequency domain resource of the target subcarrier interval, and is used to indicate that the access network device uses the system broadcast information.
  • the solution provided by the embodiment of the present disclosure is mainly described by taking the access network device and the terminal as an example. It can be understood that the access network device and the terminal include corresponding hardware structures and/or software modules for performing the respective functions in order to implement the above functions.
  • the embodiments of the present disclosure can be implemented in hardware or a combination of hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed in the present disclosure. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the technical solutions of the embodiments of the present disclosure.
  • FIG. 6 is a schematic structural diagram of an access network device according to an exemplary embodiment.
  • Access network device 600 includes a transmitter/receiver 601 and a processor 602.
  • the processor 602 can also be a controller, which is represented as "controller/processor 602" in FIG.
  • the transmitter/receiver 601 is configured to support transmission and reception of information between the access network device and the terminal in the foregoing embodiment, and support the The access network device communicates with other network entities.
  • the processor 602 performs various functions for communicating with the terminal. On the uplink, an uplink signal from the terminal is received via an antenna, demodulated by a receiver 601 (e.g., demodulated into a baseband signal), and further processed by processor 602 to recover the terminal. Send to business data and signaling information.
  • traffic data and signaling messages are processed by processor 602 and modulated by transmitter 601 (e.g., modulating a baseband signal into a high frequency signal) to produce a downlink signal that is transmitted to the terminal via an antenna.
  • transmitter 601 e.g., modulating a baseband signal into a high frequency signal
  • the processor 602 is further configured to perform various steps of the access network device side in the foregoing method embodiment, and/or other steps of the technical solution described in the embodiments of the present disclosure.
  • the access network device 600 may further include a memory 603 for storing program codes and data of the access network device 600.
  • the access network device 600 can also include a communication unit 604.
  • the communication unit 604 is configured to support the access network device 600 to communicate with other network entities (e.g., network devices in the core network, etc.).
  • the communication unit 604 can be an S1-U interface for supporting the access network device 600 to communicate with a Serving Gateway (S-GW); or the communication unit 604 can also be an S1.
  • S-GW Serving Gateway
  • the MME interface is configured to support the access network device 600 to communicate with a Mobility Management Entity (MME).
  • MME Mobility Management Entity
  • Figure 6 only shows a simplified design of the access network device 600.
  • the access network device 600 can include any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all access network devices that can implement embodiments of the present disclosure are in the present disclosure. Within the scope of protection of the embodiments.
  • FIG. 7 is a schematic structural diagram of a terminal according to an exemplary embodiment.
  • the terminal 700 includes a transmitter 701, a receiver 702, and a processor 703.
  • the processor 703 may also be a controller, and is represented as "controller/processor 703" in FIG.
  • the terminal 700 may further include a modem processor 705, where the modem processor 705 may include an encoder 706, a modulator 707, a decoder 708, and a demodulator 709.
  • the transmitter 701 conditions (eg, analog transforms, filters, amplifies, upconverts, etc.) the output samples and generates an uplink signal that is transmitted via an antenna to the connections described in the above embodiments.
  • Network access equipment On the downlink, the antenna receives the downlink signal transmitted by the access network device in the above embodiment.
  • Receiver 702 conditions (eg, filters, amplifies, downconverts, digitizes, etc.) the signals received from the antenna and provides input samples.
  • the encoder 706 receives traffic data and signaling messages to be transmitted on the uplink and processes (eg, formats, codes, and interleaves) the traffic data and signaling messages.
  • Modulator 707 further processes (e.g., symbol maps and modulates) the encoded traffic data and signaling messages and provides output samples.
  • Demodulator 707 processes (e.g., demodulates) the input samples and provides symbol estimates.
  • the decoder 708 processes (e.g., deinterleaves and decodes) the symbol estimates and provides decoded data and signaling messages that are sent to the terminal 700.
  • Encoder 707, modulator 707, demodulator 707, and decoder 707 may be implemented by a composite modem processor 705. These units are processed according to the radio access technology employed by the radio access network (e.g., access technologies of LTE and other evolved systems). It should be noted that when the terminal 700 does not include the modem processor 705, the above functions of the modem processor 705 can also be completed by the processor 703.
  • the processor 703 controls and manages the actions of the terminal 700 for performing the processing performed by the terminal 700 in the above-described embodiments of the present disclosure.
  • the processor 703 is further configured to perform various steps of the terminal side in the foregoing method embodiments, and/or other steps of the technical solution described in the embodiments of the present disclosure.
  • the terminal 700 may further include a memory 704 for storing program codes and data for the terminal 700.
  • the processor for performing the functions of the foregoing access network device or terminal in the embodiment of the present disclosure may be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), and a dedicated integration.
  • CPU central processing unit
  • DSP digital signal processor
  • ASIC Application-Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the steps of the method or algorithm described in connection with the disclosure of the embodiments of the present disclosure may be implemented in a hardware manner, or may be implemented by a processor executing software instructions.
  • the software instructions may be composed of corresponding software modules, which may be stored in a random access memory (RAM), a flash memory, a read only memory (ROM), an erasable programmable read only memory ( Erasable Programmable ROM (EPROM), electrically erasable programmable read only memory (EEPROM), registers, hard disk, removable hard disk, compact disk read only (CD-ROM) or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • Processor and memory The storage medium can be located in an ASIC. Additionally, the ASIC can be located in an access network device or terminal.
  • the processor and the storage medium may also exist as discrete components in an access network device or terminal.
  • the functions described in the embodiments of the present disclosure can be implemented in hardware, software, firmware, or any combination thereof.
  • the functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a general purpose or special purpose computer.
  • the embodiment of the present disclosure further provides a computer storage medium for storing the computer software instructions used for the access network device, which includes a program designed to execute the information sending method on the device side of the access network.
  • the embodiment of the present disclosure further provides a computer storage medium for storing the above-mentioned computer software instructions for the terminal, which comprises a program designed to execute the information search method on the terminal side.
  • a plurality as referred to herein means two or more.
  • "and/or” describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately.
  • the character "/" generally indicates that the contextual object is an "or" relationship.

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Abstract

本公开是关于一种信息搜索方法、信息发送方法、装置及系统，属于无线通信技术领域。所述方法包括：获取接入网设备发送同步块信息所采用的n种不同子载波间隔的频域资源在系统工作频段的位置，同步块信息是指用于供终端接入无线接入网的信息，n为大于1的整数；根据位置搜索接入网设备采用n种不同子载波间隔的频域资源发送的同步块信息；其中，在采用每一种子载波间隔的频域资源发送同步块信息的时间单元内，接入网设备发送至少一次同步块信息。本公开通过缩短接入网设备连续发送两个同步信号的时间间隔，使得终端搜索同步信号的时间也相应缩短，进而降低终端接入物理小区的时延。

Description

信息搜索方法、信息发送方法、装置及系统 技术领域
本公开涉及无线通信技术领域，特别涉及一种信息搜索方法、信息发送方法、装置及系统。
背景技术
低时延业务是指对终端与其它设备之间通信时的端到端时延(end-to-end delay)要求较小的业务。比如，无人驾驶业务，其要求的端到端时延为1ms左右。终端与物理小区建立连接作为终端与其它设备之间通信的第一个环节，其要求的时延也应当较小。
在相关技术中，基站占用系统工作频段的中间位置的频域资源发送同步信号，同步信号包括PSS(Primary Synchronization Signal，主同步信号)和SSS(Secondary Synchronization Signal，辅同步信号)，并且在发送PSS和SSS的时间单元内基站发送PSS和SSS的时域位置固定。当终端需要与物理小区建立连接时，终端首先在系统工作频段的中间位置的频域资源处扫描搜索，搜索到PSS或SSS之后，终端在相应的时域位置获取SSS或PSS，并根据PSS和SSS解码出PCI(Physical Cell Identifier，物理小区标识)，然后与上述PCI对应的物理小区建立连接。
发明内容
本公开实施例提供了一种信息搜索方法、信息发送方法、装置及系统。所述技术方案如下：
根据本公开实施例的第一方面，提供了一种信息搜索方法，所述方法包括：
获取接入网设备发送同步块信息所采用的n种不同子载波间隔的频域资源在系统工作频段的位置，所述同步块信息是指用于供终端接入无线接入网的信息，所述n为大于1的整数；
根据所述位置搜索所述接入网设备采用所述n种不同子载波间隔的频域资源发送的所述同步块信息；其中，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，所述接入网设备发送至少一次所述同步块信息。
可选地，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源和第二子载波间隔的频域资源；所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之一位置；所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之二位置。
可选地，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源、第二子载波间隔的频域资源和第三子载波间隔的频域资源；所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之一位置；所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之二位置；所述第三子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之三位置。
可选地，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，所述接入网设备发送一次所述同步块信息。
可选地，所述方法还包括：
在搜索到所述接入网设备采用目标子载波间隔的频域资源发送的所述同步块信息之后，根据所述同步块信息在所述目标子载波间隔的频域资源对应的发送所述同步块信息的时间单元内占用的符号位置，确定系统广播信息的发送配置；
根据所述发送配置确定所述接入网设备在发送所述系统广播信息时所采用的频域资源；
根据确定的所述频域资源扫描获取所述接入网设备发送的所述系统广播信息。
根据本公开实施例的第二方面，提供了一种信息发送方法，所述方法包括：
生成同步块信息，所述同步块信息是指用于供终端接入无线接入网的信息；
在系统工作频段内，采用n种不同子载波间隔的频域资源发送所述同步块信息；其中，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，发送至少一次所述同步块信息，所述n为大于1的整数。
可选地，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源和第二子载波间隔的频域资源；所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之一位置；所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之二位置。
可选地，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源、第二子载波间隔的频域资源和第三子载波间隔的频域资源；所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之一位置；所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之二位置；所述第三子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之三位置。
可选地，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，发送一次所述同步块信息。
可选地，所述同步块信息在目标子载波间隔的频域资源对应的发送所述同步块信息的时间单元内占用的符号位置，用于指示接入网设备在发送系统广播信息时所采用的频域资源。
根据本公开实施例的第三方面，提供了一种信息搜索装置，所述装置包括：
位置获取模块，被配置为获取接入网设备发送同步块信息所采用的n种不同子载波间隔的频域资源在系统工作频段的位置，所述同步块信息是指用于供终端接入无线接入网的信息，所述n为大于1的整数；
信息搜索模块，被配置为根据所述位置搜索所述接入网设备采用所述n种不同子载波间隔的频域资源发送的所述同步块信息；其中，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，所述接入网设备发送至少一次所述同步块信息。
可选地，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源和第二子载波间隔的频域资源；所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之一位置；所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之二位置。
可选地，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源、第二子载波间隔的频域资源和第三子载波间隔的频域资源；所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之一位置；所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之二位置；所述第三子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之三位置。
可选地，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，所述接入网设备发送一次所述同步块信息。
可选地，所述装置还包括：
配置确定模块，被配置为在搜索到所述接入网设备采用目标子载波间隔的频域资源发送的所述同步块信息之后，根据所述同步块信息在所述目标子载波间隔的频域资源对应的发送所述同步块信息的时间单元内占用的符号位置，确定系统广播信息的发送配置；
频域确定模块，被配置为根据所述发送配置确定所述接入网设备在发送所述系统广播信息时所采用的频域资源；
信息获取模块，被配置为根据确定的所述频域资源扫描获取所述接入网设备发送的所述系统广播信息。
根据本公开实施例的第四方面，提供了一种信息发送装置，所述装置包括：
信息生成模块，被配置为生成同步块信息，所述同步块信息是指用于供终端接入无线接入网的信息；
信息发送模块，被配置为在系统工作频段内，采用n种不同子载波间隔的频域资源发送所述同步块信息；其中，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，发送至少一次所述同步块信息，所述n为大于1的整数。
可选地，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源和第二子载波间隔的频域资源；所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之一位置；所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之二位置。
可选地，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源、第二子载波间隔的频域资源和第三子载波间隔的频域资源；所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之一位置；所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之二位置；所述第三子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之三位置。
可选地，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，发送一次所述同步块信息。
可选地，所述同步块信息在目标子载波间隔的频域资源对应的发送所述同步块信息的时间单元内占用的符号位置，用于指示接入网设备在发送系统广播信息时所采用的频域资源。
根据本公开实施例的第五方面，提供了一种通信系统，所述通信系统包括：终端和接入网设备；
所述终端包括如第三方面所述的装置；
所述接入网设备包括如第四方面所述的装置。
根据本公开实施例的第六方面，提供了一种信息搜索装置，所述装置包括：
处理器；
用于存储所述处理器的可执行指令的存储器；
其中，所述处理器被配置为：
获取接入网设备发送同步块信息所采用的n种不同子载波间隔的频域资源在系统工作频段的位置，所述同步块信息是指用于供终端接入无线接入网的信息，所述n为大于1的整数；
根据所述位置搜索所述接入网设备采用所述n种不同子载波间隔的频域资源发送的所述同步块信息；其中，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，所述接入网设备发送至少一次所述同步块信息。
根据本公开实施例的第七方面，提供了一种信息发送装置，所述装置包括：
处理器；
用于存储所述处理器的可执行指令的存储器；
其中，所述处理器被配置为：
生成同步块信息，所述同步块信息是指用于供终端接入无线接入网的信息；
在系统工作频段内，采用n种不同子载波间隔的频域资源发送所述同步块信息；其中，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，发送至少一次所述同步块信息，所述n为大于1的整数。
本公开实施例提供的技术方案可以包括以下有益效果：
通过在系统工作频段内配置多种不同的子载波间隔，接入网设备采用多种不同的子载波间隔的频域资源发送同步块信息；解决了相关技术中因接入网设备只能够采用一种固定的子载波间隔的频域资源发送同步信号，导致接入网设备连续发送两个同步信号的时间间隔较长，因此终端搜索同步信号并完成小区接入的耗时较长的问题；缩短了接入网设备连续发送两个同步信号的时间间隔，使得终端搜索同步信号的时间也相应缩短，进而降低终端接入物理小区的 时延。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施例，并与说明书一起用于解释本公开的原理。
图1是根据一示例性实施例示出的一种应用场景的示意图；
图2A是根据一示例性实施例示出的一种信息搜索方法的流程图；
图2B/2C/2D是根据一示例性实施例示出的发送同步块信息的示意图；
图3是根据一示例性实施例示出的一种信息搜索装置的框图；
图4是根据另一示例性实施例示出的一种信息搜索装置的框图；
图5是根据一示例性实施例示出的一种信息发送装置的框图；
图6是根据一示例性实施例示出的一种接入网设备的框图；
图7是根据一示例性实施例示出的一种终端的框图。
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本公开相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本公开的一些方面相一致的装置和方法的例子。
本公开实施例描述的网络架构以及业务场景是为了更加清楚地说明本公开实施例的技术方案，并不构成对本公开实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本公开实施例提供的技术方案对于类似的技术问题，同样适用。
图1是根据一示例性实施例示出的一种应用场景的示意图。该应用场景可以是移动通信系统，该移动通信系统可以是5G(5th Generation，第五代)系统。该应用场景包括：终端110与接入网设备120。
终端110的数量可以是一个或多个。接入网设备120的数量也可以是一个或多个。每个接入网设备120管理一个或多个物理小区，每个物理小区内分布 一个或多个终端120。
接入网设备120与终端110之间通过无线空口(也可以称为空中接口或空口)建立无线连接。可选地，该无线空口是基于第五代移动通信网络技术(5G)标准的无线空口，比如该无线空口是NR(New Radio，新空口)；或者，该无线空口也可以是基于5G的更下一代移动通信网络技术标准的无线空口。
在图1所示的应用场景中，可以包括多个终端110和/或多个接入网设备120，图1中以示出一个终端110和一个接入网设备120来举例说明，但本公开实施例对此不作限定。
本公开实施例中，名词“网络”和“系统”经常交替使用，但本领域技术人员可以理解其含义。
本公开实施例所涉及到的终端可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备，以及各种形式的用户设备(User Equipment，UE)，移动台(Mobile Station，MS)，终端设备(terminal device)等等。为方便描述，上面提到的设备统称为终端。
本公开实施例所涉及到的RAN(Radio Access Network，无线接入网)中的接入网设备可以是基站(Base Station，BS)，所述基站是一种部署在RAN中用以为终端提供无线通信功能的装置。所述基站可以包括各种形式的宏基站，微基站，中继站，接入点等等。在采用不同的无线接入技术的系统中，具备基站功能的设备的名称可能会有所不同，例如在LTE系统中，称为演进的节点B(evolved NodeB，eNB或eNodeB)，在3G通信系统中，称为节点B(Node B)等等。随着通信技术的演进，“基站”这一名称可能会变化。为方便描述，本公开实施例中，上述为终端提供无线通信功能的装置统称为接入网设备。
在相关技术中，由于在系统工作频段内，子载波间隔是固定的，为15kHz，因此接入网设备只能够采用该固定的子载波间隔的频域资源发送同步信号，导致接入网设备连续发送两个同步信号的时间间隔较长，因此终端搜索同步信号并完成小区接入的耗时较长。在本公开实施例中，在系统工作频段内，支持多种不同的子载波间隔，接入网设备采用多种不同的子载波间隔的频域资源发送同步信号，从而缩短连续发送两个同步信号的时间间隔，使得终端搜索同步信号的时间也相应缩短，进而降低终端接入物理小区的时延。下面将基于上面所述的本公开实施例涉及的共性方面，对本公开实施例进一步详细说明。
图2A是根据一示例性实施例示出的一种信息搜索方法的流程图。该方法可应用于图1所示的应用场景中。该方法可以包括如下几个步骤。
在步骤201中，接入网设备生成同步块信息。
同步块信息是指用于供终端接入无线接入网的信息。可选地，同步块信息是指用于供终端获取物理小区标识、完成下行同步以及小区接入的信息。物理小区标识是指接入网设备所管理的物理小区对应的标识符。完成下行同步是小区接入的前提。小区接入是指终端与接入网设备所管理的物理小区建立无线连接。
可选地，同步块信息包括同步信号与广播信号。同步信号包括主同步信号与辅同步信号。同步信号用于供终端获取物理小区标识和完成下行同步。主同步信号用于传输物理小区标识中的组内标识，辅同步信号用于传输物理小区标识中的组标识，主同步信号与辅同步信号共同作用，以唯一标识物理小区。广播信号用于供终端获取实现小区接入的相关信息。
在其它可能的实施方式中，同步块信息即为同步信号。
在步骤202中，在系统工作频段内，接入网设备采用n种不同子载波间隔的频域资源发送同步块信息，n为大于1的整数。
系统工作频段是指接入网设备和终端所处的移动通信系统所支持的频率范围。系统工作频段由相关的标准组织预先划分分配。例如，系统工作频段可以是2.3GHz～2.4GHz，也可以是20GHz～22GHz，等等。
在本公开实施例中，在系统工作频段内，支持多种不同子载波间隔的频域资源。例如，支持15kHz和30kHz两种不同子载波间隔的频域资源。在本公开实施例中，对每一种子载波间隔的具体取值不作限定，其可根据实际情况预先设定。上述n种不同子载波间隔的频域资源中，任意两种不同子载波间隔的频域资源所占用的频段互不重叠。
在采用每一种子载波间隔的频域资源发送同步块信息的时间单元内，发送至少一次同步块信息。对于每一种子载波间隔的频域资源，采用该种子载波间隔的频域资源发送同步块信息的时间单元在时域上可以是连续的，也可以是不连续的。另外，上述时间单元的划分方式可根据实际情况预先设定，例如1个时间单元为1个子帧，也即1ms。示例性地，以1个时间单元为1个子帧为例，对于某一种子载波间隔的频域资源，采用该种子载波间隔的频域资源发送同步 块信息的相邻两个子帧之间间隔4个子帧。
在本公开实施例中，对系统工作频段内支持的不同子载波间隔的数量n的取值不作限定，其可根据实际情况预先设定。例如，根据移动通信系统支持的业务类型的数量，相应确定n的取值。在一个示例中，n的取值为2，也即系统工作频段内支持2种不同子载波间隔的频域资源，其中一种子载波间隔的频域资源用于服务低时延业务需求的终端，另一种子载波间隔的频域资源用于服务非低时延业务需求的终端。在另一个示例中，n的取值为3，也即系统工作频段内支持3种不同子载波间隔的频域资源，其中第一种子载波间隔的频域资源用于服务增强型移动宽带(enhanced Mobile Broadband，eMBB)业务需求的终端，第二种子载波间隔的频域资源用于服务大规模机器通信(massive Machine-type Communication，mMTC)业务需求的终端，第三种子载波间隔的频域资源用于服务高可靠低时延通信(Ultra-relaible and Low Latency Communication，URLLC)业务需求的终端。
另外，对于上述n种不同子载波间隔的频域资源，每一种子载波间隔的频域资源对应的载波中心位置可以预先设定。
在一种可能的实施方式中，当n的取值为2时，n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源和第二子载波间隔的频域资源。第一子载波间隔的频域资源对应的载波中心位于系统工作频段的三分之一位置，第二子载波间隔的频域资源对应的载波中心位于系统工作频段的三分之二位置。
结合参考图2B，其示例性示出了接入网设备采用两种不同子载波间隔的频域资源发送同步块信息的示意图。其中，第一子载波间隔为15kHz，该子载波间隔为15kHz的频域资源对应的载波中心位于系统工作频段的三分之一位置，接入网设备在采用该子载波间隔为15kHz的频域资源发送同步块信息的时间单元内，发送一次同步块信息；第二子载波间隔为30kHz，该子载波间隔为30kHz的频域资源对应的载波中心位于系统工作频段的三分之二位置，接入网设备在采用该子载波间隔为30kHz的频域资源发送同步块信息的时间单元内，发送两次同步块信息。图2B中，黑色矩形方块用于指示发送同步块信息的时频资源块。
在另一种可能的实施方式中，当n的取值为3时，n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源、第二子载波间隔的频域资源和第三子载波间隔的频域资源。第一子载波间隔的频域资源对应的载波中心位于系统 工作频段的四分之一位置，第二子载波间隔的频域资源对应的载波中心位于系统工作频段的四分之二位置(也即中心位置)，第三子载波间隔的频域资源对应的载波中心位于系统工作频段的四分之三位置。
结合参考图2C，其示例性示出了接入网设备采用三种不同子载波间隔的频域资源发送同步块信息的示意图。其中，第一子载波间隔为15kHz，该子载波间隔为15kHz的频域资源对应的载波中心位于系统工作频段的四分之一位置，接入网设备在采用该子载波间隔为15kHz的频域资源发送同步块信息的时间单元内，发送一次同步块信息；第二子载波间隔为30kHz，该子载波间隔为30kHz的频域资源对应的载波中心位于系统工作频段的四分之二位置，接入网设备在采用该子载波间隔为30kHz的频域资源发送同步块信息的时间单元内，发送两次同步块信息；第三子载波间隔为60kHz，该子载波间隔为60kHz的频域资源对应的载波中心位于系统工作频段的四分之三位置，接入网设备在采用该子载波间隔为60kHz的频域资源发送同步块信息的时间单元内，发送四次同步块信息。图2C中，黑色矩形方块用于指示发送同步块信息的时频资源块。
需要说明的是，上述针对每一种子载波间隔的频域资源对应的载波中心在系统工作频段中的位置仅是示例性和解释性的，在实际应用中，可根据实际情况预先设定，只需保证这n种不同子载波间隔的频域资源中，任意两种不同子载波间隔的频域资源所占用的频段互不重叠即可。
另外，对于n种不同子载波间隔的频域资源中的任意两种不同子载波间隔的频域资源，采用其中一种子载波间隔的频域资源发送同步块信息的时间与采用另一种子载波间隔的频域资源发送同步块信息的时间不完全相同。通过上述方式，尽可能地错开发送同步块信息的时间，使得同步块信息的发送时间相对均匀分布，确保终端搜索获取同步块信息的效率。
可选地，在采用每一种子载波间隔的频域资源发送同步块信息的时间单元内，接入网设备发送一次同步块信息。通过上述方式，可以节省系统的时频资源，还可以提供分集增益。
结合参考图2D，其示例性示出了接入网设备采用两种不同子载波间隔的频域资源发送同步块信息的另一示意图。其中，第一子载波间隔为15kHz，接入网设备在采用该子载波间隔为15kHz的频域资源发送同步块信息的时间单元内，发送一次同步块信息；第二子载波间隔为30kHz，接入网设备在采用该子载波间隔为30kHz的频域资源发送同步块信息的时间单元内，也发送一次同 步块信息。其中，黑色矩形方块用于指示发送同步块信息的时频资源块。
另外，在本公开实施例中，对于每一种子载波间隔的频域资源，其一个时频资源块在时域上占用的符号(symbol)所对应的时间长度不作限定，其可以由相关的标准组织预先规定。在本公开实施例中，对于每一种子载波间隔的频域资源，采用该子载波间隔的频域资源发送同步块信息所占用的符号位置也不作限定，其可以由相关的标准组织预先规定。
在步骤203中，终端获取接入网设备发送同步块信息所采用的n种不同子载波间隔的频域资源在系统工作频段的位置。
每一种子载波间隔的频域资源在系统工作频段的位置，即是指该子载波间隔的频域资源对应的载波中心在系统工作频段中的位置。
另外，接入网设备发送同步块信息所采用的频域资源所对应的不同子载波间隔的数量n，以及每一种子载波间隔的频域资源在系统工作频段的位置，可以预先存储在终端的配置信息中，也可以由接入网设备告知给终端。
在步骤204中，终端根据上述位置搜索接入网设备采用n种不同子载波间隔的频域资源发送的同步块信息。
终端获取到上述位置之后，也即获取到接入网设备发送同步块信息所采用的频段，终端在上述频段中扫描搜索同步块信息。在本公开实施例中，终端可以在系统工作频段的多个位置处同时分别搜索同步信号，并且无论先在哪个位置处先搜索到同步信号，其它同频的以及不同子载波间隔的频域资源上的同步信号的位置均是相对固定可知的，从而提高搜索效率。
综上所述，本公开实施例提供的方法，通过在系统工作频段内配置多种不同的子载波间隔，接入网设备采用多种不同的子载波间隔的频域资源发送同步块信息；解决了相关技术中因接入网设备只能够采用一种固定的子载波间隔的频域资源发送同步信号，导致接入网设备连续发送两个同步信号的时间间隔较长，因此终端搜索同步信号并完成小区接入的耗时较长的问题；缩短了接入网设备连续发送两个同步信号的时间间隔，使得终端搜索同步信号的时间也相应缩短，进而降低终端接入物理小区的时延。
另外，在采用每一种子载波间隔的频域资源发送同步块信息的时间单元内，接入网设备发送一次同步块信息，可以节省系统的时频资源，还可以提供分集增益。
在基于图2A所示实施例提供的一个可选实施例中，该方法还可以包括如下的几个步骤：
1，在搜索到接入网设备采用目标子载波间隔的频域资源发送的同步块信息之后，终端根据该同步块信息在目标子载波间隔的频域资源对应的发送该同步块信息的时间单元内占用的符号位置，确定系统广播信息的发送配置。
2、终端根据发送配置确定接入网设备在发送系统广播信息时所采用的频域资源。
3、终端根据确定的频域资源扫描获取接入网设备发送的系统广播信息。
目标子载波间隔是预先规定的一个子载波间隔。可选地，目标子载波间隔是最大的子载波间隔。
在本公开实施例中，同步块信息在目标子载波间隔的频域资源对应的发送所述同步块信息的时间单元内占用的符号位置，用于指示系统广播信息的发送配置。系统广播信息是指完成物理小区接入所需的必要信息，例如系统带宽、系统帧号、PHICH(Physical Hybrid-ARQ Indicator Channel，物理混合重传指示信道)配置信息等等。
示例性地，结合参考图2B，以目标子载波间隔为30kHz子载波间隔为例，如果同步块信息在30kHz子载波间隔的频域资源对应的发送该同步块信息的时间单元内占用的符号位置为前两个符号，则表示接入网设备在两种不同的子载波间隔的频域资源上均发送系统广播信息；如果同步块信息在30kHz子载波间隔的频域资源对应的发送该同步块信息的时间单元内占用的符号位置为最后两个符号，则表示接入网设备仅在15kHz子载波间隔的频域资源上发送系统广播信息。
在本公开实施例中，还通过采用同步块信息在目标子载波间隔的频域资源对应的发送该同步块信息的时间单元内占用的符号位置，指示系统广播信息的发送配置，终端可根据上述发送配置确定接入网设备在发送系统广播信息时所采用的频域资源，从而提高终端搜索获取系统广播信息的效率。
下述为本公开装置实施例，可以用于执行本公开方法实施例。对于本公开装置实施例中未披露的细节，请参照本公开方法实施例。
图3是根据一示例性实施例示出的一种信息搜索装置的框图。该装置具有实现上述终端侧方法示例的功能，所述功能可以由硬件实现，也可以由硬件执 行相应的软件实现。该装置可以包括：位置获取模块301和信息搜索模块302。
位置获取模块301，被配置为获取接入网设备发送同步块信息所采用的n种不同子载波间隔的频域资源在系统工作频段的位置，所述同步块信息是指用于供终端接入无线接入网的信息，所述n为大于1的整数。
信息搜索模块302，被配置为根据所述位置搜索所述接入网设备采用所述n种不同子载波间隔的频域资源发送的所述同步块信息；其中，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，所述接入网设备发送至少一次所述同步块信息。
综上所述，本公开实施例提供的装置，通过在系统工作频段内配置多种不同的子载波间隔，接入网设备采用多种不同的子载波间隔的频域资源发送同步块信息；解决了相关技术中因接入网设备只能够采用一种固定的子载波间隔的频域资源发送同步信号，导致接入网设备连续发送两个同步信号的时间间隔较长，因此终端搜索同步信号并完成小区接入的耗时较长的问题；缩短了接入网设备连续发送两个同步信号的时间间隔，使得终端搜索同步信号的时间也相应缩短，进而降低终端接入物理小区的时延。
在基于图3所示实施例提供的一个可选实施例中，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源和第二子载波间隔的频域资源；所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之一位置；所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之二位置。
在基于图3所示实施例提供的另一个可选实施例中，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源、第二子载波间隔的频域资源和第三子载波间隔的频域资源；所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之一位置；所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之二位置；所述第三子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之三位置。
在基于图3所示实施例提供的另一个可选实施例中，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，所述接入网设备发送一次所述同步块信息。
在基于图3所示实施例提供的另一个可选实施例中，请参考图4，所述装置还包括：配置确定模块303、频域确定模块304和信息获取模块305。
配置确定模块303，被配置为在搜索到所述接入网设备采用目标子载波间隔的频域资源发送的所述同步块信息之后，根据所述同步块信息在所述目标子载波间隔的频域资源对应的发送所述同步块信息的时间单元内占用的符号位置，确定系统广播信息的发送配置。
频域确定模块304，被配置为根据所述发送配置确定所述接入网设备在发送所述系统广播信息时所采用的频域资源。
信息获取模块305，被配置为根据确定的所述频域资源扫描获取所述接入网设备发送的所述系统广播信息。
图5是根据一示例性实施例示出的一种信息发送装置的框图。该装置具有实现上述接入网设备侧方法示例的功能，所述功能可以由硬件实现，也可以由硬件执行相应的软件实现。该装置可以包括：信息生成模块501和信息发送模块502。
信息生成模块501，被配置为生成同步块信息，所述同步块信息是指用于供终端接入无线接入网的信息。
信息发送模块502，被配置为在系统工作频段内，采用n种不同子载波间隔的频域资源发送所述同步块信息；其中，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，发送至少一次所述同步块信息，所述n为大于1的整数。
综上所述，本公开实施例提供的装置，通过在系统工作频段内配置多种不同的子载波间隔，接入网设备采用多种不同的子载波间隔的频域资源发送同步块信息；解决了相关技术中因接入网设备只能够采用一种固定的子载波间隔的频域资源发送同步信号，导致接入网设备连续发送两个同步信号的时间间隔较长，因此终端搜索同步信号并完成小区接入的耗时较长的问题；缩短了接入网设备连续发送两个同步信号的时间间隔，使得终端搜索同步信号的时间也相应缩短，进而降低终端接入物理小区的时延。
在基于图5所示实施例提供的一个可选实施例中，，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源和第二子载波间隔的频域资源；所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之一位置；所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之二位置。
在基于图5所示实施例提供的另一个可选实施例中，，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源、第二子载波间隔的频域资源和第三子载波间隔的频域资源；所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之一位置；所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之二位置；所述第三子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之三位置。
在基于图5所示实施例提供的另一个可选实施例中，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，发送一次所述同步块信息。
在基于图5所示实施例提供的另一个可选实施例中，所述同步块信息在目标子载波间隔的频域资源对应的发送所述同步块信息的时间单元内占用的符号位置，用于指示接入网设备在发送系统广播信息时所采用的频域资源。
本公开一示例性实施例还提供了一种无线网络接入系统(或称为通信系统)，所述系统包括：终端和接入网设备。所述终端包括如图3所示实施例或者基于图3所示实施例提供的任一可选实施例所提供的信息搜索装置。所述接入网设备包括如图5所示实施例或者基于图5所示实施例提供的任一可选实施例所提供的信息发送装置。
需要说明的一点是，上述实施例提供的装置在实现其功能时，仅以上述各个功能模块的划分进行举例说明，实际应用中，可以根据实际需要而将上述功能分配由不同的功能模块完成，即将设备的内容结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
关于上述实施例中的装置，其中各个模块执行操作的具体方式已经在有关该方法的实施例中进行了详细描述，此处将不做详细阐述说明。
本公开一示例性实施例还提供了一种信息搜索装置，能够实现本公开提供的信息搜索方法。该装置包括：处理器，以及用于存储处理器的可执行指令的存储器。其中，处理器被配置为：
获取接入网设备发送同步块信息所采用的n种不同子载波间隔的频域资源在系统工作频段的位置，所述同步块信息是指用于供终端接入无线接入网的信 息，所述n为大于1的整数；
根据所述位置搜索所述接入网设备采用所述n种不同子载波间隔的频域资源发送的所述同步块信息；其中，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，所述接入网设备发送至少一次所述同步块信息。
可选地，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源和第二子载波间隔的频域资源；所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之一位置；所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之二位置。
可选地，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源、第二子载波间隔的频域资源和第三子载波间隔的频域资源；所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之一位置；所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之二位置；所述第三子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之三位置。
可选地，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，所述接入网设备发送一次所述同步块信息。
可选地，处理器还被配置为：
在搜索到所述接入网设备采用目标子载波间隔的频域资源发送的所述同步块信息之后，根据所述同步块信息在所述目标子载波间隔的频域资源对应的发送所述同步块信息的时间单元内占用的符号位置，确定系统广播信息的发送配置；
根据所述发送配置确定所述接入网设备在发送所述系统广播信息时所采用的频域资源；
根据确定的所述频域资源扫描获取所述接入网设备发送的所述系统广播信息。
本公开一示例性实施例还提供了一种信息发送装置，能够实现本公开提供的信息发送方法。该装置包括：处理器，以及用于存储处理器的可执行指令的存储器。其中，处理器被配置为：
生成同步块信息，所述同步块信息是指用于供终端接入无线接入网的信息；
在系统工作频段内，采用n种不同子载波间隔的频域资源发送所述同步块信息；其中，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，发送至少一次所述同步块信息，所述n为大于1的整数。
可选地，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源和第二子载波间隔的频域资源；所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之一位置；所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之二位置。
可选地，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源、第二子载波间隔的频域资源和第三子载波间隔的频域资源；所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之一位置；所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之二位置；所述第三子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之三位置。
可选地，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，发送一次所述同步块信息。
可选地，所述同步块信息在目标子载波间隔的频域资源对应的发送所述同步块信息的时间单元内占用的符号位置，用于指示接入网设备在发送系统广播信息时所采用的频域资源。
上述主要以接入网设备和终端为例，对本公开实施例提供的方案进行了介绍。可以理解的是，接入网设备、终端为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。结合本公开中所公开的实施例描述的各示例的单元及算法步骤，本公开实施例能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。本领域技术人员可以对每个特定的应用来使用不同的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实施例的技术方案的范围。
图6是根据一示例性实施例示出的一种接入网设备的结构示意图。
接入网设备600包括发射器/接收器601和处理器602。其中，处理器602也可以为控制器，图6中表示为“控制器/处理器602”。所述发射器/接收器601用于支持接入网设备与上述实施例中的所述终端之间收发信息，以及支持所述 接入网设备与其它网络实体之间进行通信。所述处理器602执行各种用于与终端通信的功能。在上行链路，来自所述终端的上行链路信号经由天线接收，由接收器601进行解调(例如将高频信号解调为基带信号)，并进一步由处理器602进行处理来恢复终端所发送到业务数据和信令信息。在下行链路上，业务数据和信令消息由处理器602进行处理，并由发射器601进行调制(例如将基带信号调制为高频信号)来产生下行链路信号，并经由天线发射给终端。需要说明的是，上述解调或调制的功能也可以由处理器602完成。例如，处理器602还用于执行上述方法实施例中接入网设备侧的各个步骤，和/或本公开实施例所描述的技术方案的其它步骤。
进一步的，接入网设备600还可以包括存储器603，存储器603用于存储接入网设备600的程序代码和数据。此外，接入网设备600还可以包括通信单元604。通信单元604用于支持接入网设备600与其它网络实体(例如核心网中的网络设备等)进行通信。例如，在LTE系统中，该通信单元604可以是S1-U接口，用于支持接入网设备600与服务网关(Serving Gateway，S-GW)进行通信；或者，该通信单元604也可以是S1-MME接口，用于支持接入网设备600与移动性管理实体(Mobility Management Entity，MME)进行通信。
可以理解的是，图6仅仅示出了接入网设备600的简化设计。在实际应用中，接入网设备600可以包含任意数量的发射器，接收器，处理器，控制器，存储器，通信单元等，而所有可以实现本公开实施例的接入网设备都在本公开实施例的保护范围之内。
图7是根据一示例性实施例示出的一种终端的结构示意图。
所述终端700包括发射器701，接收器702和处理器703。其中，处理器703也可以为控制器，图7中表示为“控制器/处理器703”。可选的，所述终端700还可以包括调制解调处理器705，其中，调制解调处理器705可以包括编码器706、调制器707、解码器708和解调器709。
在一个示例中，发射器701调节(例如，模拟转换、滤波、放大和上变频等)该输出采样并生成上行链路信号，该上行链路信号经由天线发射给上述实施例中所述的接入网设备。在下行链路上，天线接收上述实施例中接入网设备发射的下行链路信号。接收器702调节(例如，滤波、放大、下变频以及数字化等)从天线接收的信号并提供输入采样。在调制解调处理器705中，编码器 706接收要在上行链路上发送的业务数据和信令消息，并对业务数据和信令消息进行处理(例如，格式化、编码和交织)。调制器707进一步处理(例如，符号映射和调制)编码后的业务数据和信令消息并提供输出采样。解调器707处理(例如，解调)该输入采样并提供符号估计。解码器708处理(例如，解交织和解码)该符号估计并提供发送给终端700的已解码的数据和信令消息。编码器707、调制器707、解调器707和解码器707可以由合成的调制解调处理器705来实现。这些单元根据无线接入网采用的无线接入技术(例如，LTE及其他演进系统的接入技术)来进行处理。需要说明的是，当终端700不包括调制解调处理器705时，调制解调处理器705的上述功能也可以由处理器703完成。
处理器703对终端700的动作进行控制管理，用于执行上述本公开实施例中由终端700进行的处理过程。例如，处理器703还用于执行上述方法实施例中的终端侧的各个步骤，和/或本公开实施例所描述的技术方案的其它步骤。
进一步的，终端700还可以包括存储器704，存储器704用于存储用于终端700的程序代码和数据。
用于执行本公开实施例上述接入网设备或终端的功能的处理器可以是中央处理器(Central Processing Unit，CPU)，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)，现场可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。其可以实现或执行结合本公开实施例公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。
结合本公开实施例公开内容所描述的方法或者算法的步骤可以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器(Random Access Memory，RAM)、闪存、只读存储器(Read Only Memory，ROM)、可擦除可编程只读存储器(Erasable Programmable ROM，EPROM)、电可擦可编程只读存储器(Electrically EPROM，EEPROM)、寄存器、硬盘、移动硬盘、只读光盘(CD-ROM)或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存 储介质可以位于ASIC中。另外，该ASIC可以位于接入网设备或终端中。当然，处理器和存储介质也可以作为分立组件存在于接入网设备或终端中。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本公开实施例所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
本公开实施例还提供了一种计算机存储介质，用于储存为上述用于接入网设备所用的计算机软件指令，其包含用于执行上述接入网设备侧的信息发送方法所设计的程序。
本公开实施例还提供了一种计算机存储介质，用于储存为上述用于终端所用的计算机软件指令，其包含用于执行上述终端侧的信息搜索方法所设计的程序。
应当理解的是，在本文中提及的“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本公开的其它实施方案。本申请旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由下面的权利要求指出。
应当理解的是，本公开并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本公开的范围仅由所附的权利要求来限制。

Claims (23)

  1. 一种信息搜索方法，其特征在于，所述方法包括：
    获取接入网设备发送同步块信息所采用的n种不同子载波间隔的频域资源在系统工作频段的位置，所述同步块信息是指用于供终端接入无线接入网的信息，所述n为大于1的整数；
    根据所述位置搜索所述接入网设备采用所述n种不同子载波间隔的频域资源发送的所述同步块信息；其中，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，所述接入网设备发送至少一次所述同步块信息。
  2. 根据权利要求1所述的方法，其特征在于，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源和第二子载波间隔的频域资源；
    所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之一位置；
    所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之二位置。
  3. 根据权利要求1所述的方法，其特征在于，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源、第二子载波间隔的频域资源和第三子载波间隔的频域资源；
    所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之一位置；
    所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之二位置；
    所述第三子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之三位置。
  4. 根据权利要求1所述的方法，其特征在于，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，所述接入网设备发送一次所述同步块信息。
  5. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    在搜索到所述接入网设备采用目标子载波间隔的频域资源发送的所述同步块信息之后，根据所述同步块信息在所述目标子载波间隔的频域资源对应的发送所述同步块信息的时间单元内占用的符号位置，确定系统广播信息的发送配置；
    根据所述发送配置确定所述接入网设备在发送所述系统广播信息时所采用的频域资源；
    根据确定的所述频域资源扫描获取所述接入网设备发送的所述系统广播信息。
  6. 一种信息发送方法，其特征在于，所述方法包括：
    生成同步块信息，所述同步块信息是指用于供终端接入无线接入网的信息；
    在系统工作频段内，采用n种不同子载波间隔的频域资源发送所述同步块信息；其中，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，发送至少一次所述同步块信息，所述n为大于1的整数。
  7. 根据权利要求6所述的方法，其特征在于，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源和第二子载波间隔的频域资源；
    所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之一位置；
    所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之二位置。
  8. 根据权利要求6所述的方法，其特征在于，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源、第二子载波间隔的频域资源和第三子载波间隔的频域资源；
    所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之一位置；
    所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之二位置；
    所述第三子载波间隔的频域资源对应的载波中心位于所述系统工作频段 的四分之三位置。
  9. 根据权利要求6所述的方法，其特征在于，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，发送一次所述同步块信息。
  10. 根据权利要求6所述的方法，其特征在于，所述同步块信息在目标子载波间隔的频域资源对应的发送所述同步块信息的时间单元内占用的符号位置，用于指示接入网设备在发送系统广播信息时所采用的频域资源。
  11. 一种信息搜索装置，其特征在于，所述装置包括：
    位置获取模块，被配置为获取接入网设备发送同步块信息所采用的n种不同子载波间隔的频域资源在系统工作频段的位置，所述同步块信息是指用于供终端接入无线接入网的信息，所述n为大于1的整数；
    信息搜索模块，被配置为根据所述位置搜索所述接入网设备采用所述n种不同子载波间隔的频域资源发送的所述同步块信息；其中，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，所述接入网设备发送至少一次所述同步块信息。
  12. 根据权利要求11所述的装置，其特征在于，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源和第二子载波间隔的频域资源；
    所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之一位置；
    所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之二位置。
  13. 根据权利要求11所述的装置，其特征在于，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源、第二子载波间隔的频域资源和第三子载波间隔的频域资源；
    所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之一位置；
    所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段 的四分之二位置；
    所述第三子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之三位置。
  14. 根据权利要求11所述的装置，其特征在于，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，所述接入网设备发送一次所述同步块信息。
  15. 根据权利要求11所述的装置，其特征在于，所述装置还包括：
    配置确定模块，被配置为在搜索到所述接入网设备采用目标子载波间隔的频域资源发送的所述同步块信息之后，根据所述同步块信息在所述目标子载波间隔的频域资源对应的发送所述同步块信息的时间单元内占用的符号位置，确定系统广播信息的发送配置；
    频域确定模块，被配置为根据所述发送配置确定所述接入网设备在发送所述系统广播信息时所采用的频域资源；
    信息获取模块，被配置为根据确定的所述频域资源扫描获取所述接入网设备发送的所述系统广播信息。
  16. 一种信息发送装置，其特征在于，所述装置包括：
    信息生成模块，被配置为生成同步块信息，所述同步块信息是指用于供终端接入无线接入网的信息；
    信息发送模块，被配置为在系统工作频段内，采用n种不同子载波间隔的频域资源发送所述同步块信息；其中，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，发送至少一次所述同步块信息，所述n为大于1的整数。
  17. 根据权利要求16所述的装置，其特征在于，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源和第二子载波间隔的频域资源；
    所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的三分之一位置；
    所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段 的三分之二位置。
  18. 根据权利要求16所述的装置，其特征在于，所述n种不同子载波间隔的频域资源包括第一子载波间隔的频域资源、第二子载波间隔的频域资源和第三子载波间隔的频域资源；
    所述第一子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之一位置；
    所述第二子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之二位置；
    所述第三子载波间隔的频域资源对应的载波中心位于所述系统工作频段的四分之三位置。
  19. 根据权利要求16所述的装置，其特征在于，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，发送一次所述同步块信息。
  20. 根据权利要求16所述的装置，其特征在于，所述同步块信息在目标子载波间隔的频域资源对应的发送所述同步块信息的时间单元内占用的符号位置，用于指示接入网设备在发送系统广播信息时所采用的频域资源。
  21. 一种通信系统，其特征在于，所述通信系统包括：终端和接入网设备；
    所述终端包括如权利要求11至15任一项所述的装置；
    所述接入网设备包括如权利要求16至20任一项所述的装置。
  22. 一种信息搜索装置，其特征在于，所述装置包括：
    处理器；
    用于存储所述处理器的可执行指令的存储器；
    其中，所述处理器被配置为：
    获取接入网设备发送同步块信息所采用的n种不同子载波间隔的频域资源在系统工作频段的位置，所述同步块信息是指用于供终端接入无线接入网的信息，所述n为大于1的整数；
    根据所述位置搜索所述接入网设备采用所述n种不同子载波间隔的频域资 源发送的所述同步块信息；其中，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，所述接入网设备发送至少一次所述同步块信息。
  23. 一种信息发送装置，其特征在于，所述装置包括：
    处理器；
    用于存储所述处理器的可执行指令的存储器；
    其中，所述处理器被配置为：
    生成同步块信息，所述同步块信息是指用于供终端接入无线接入网的信息；
    在系统工作频段内，采用n种不同子载波间隔的频域资源发送所述同步块信息；其中，在采用每一种子载波间隔的频域资源发送所述同步块信息的时间单元内，发送至少一次所述同步块信息，所述n为大于1的整数。
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