WO2016115738A1 - 一种寻呼方法、设备及系统 - Google Patents

一种寻呼方法、设备及系统 Download PDF

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Publication number
WO2016115738A1
WO2016115738A1 PCT/CN2015/071463 CN2015071463W WO2016115738A1 WO 2016115738 A1 WO2016115738 A1 WO 2016115738A1 CN 2015071463 W CN2015071463 W CN 2015071463W WO 2016115738 A1 WO2016115738 A1 WO 2016115738A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
paging
coverage level
message
base station
Prior art date
Application number
PCT/CN2015/071463
Other languages
English (en)
French (fr)
Inventor
熊新
于映辉
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to CN201580002319.0A priority Critical patent/CN106171022B/zh
Priority to MX2017009590A priority patent/MX2017009590A/es
Priority to KR1020177022945A priority patent/KR102103918B1/ko
Priority to BR112017015725-0A priority patent/BR112017015725B1/pt
Priority to PCT/CN2015/071463 priority patent/WO2016115738A1/zh
Priority to EP15878415.7A priority patent/EP3240339B1/en
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201810634192.XA priority patent/CN108684020A/zh
Priority to CN201810634193.4A priority patent/CN108566671B/zh
Priority to JP2017538999A priority patent/JP6890541B2/ja
Publication of WO2016115738A1 publication Critical patent/WO2016115738A1/zh
Priority to US15/656,692 priority patent/US10813076B2/en
Priority to US16/844,879 priority patent/US10999818B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/02—Arrangements for increasing efficiency of notification or paging channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0245—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal according to signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a paging method, device, and system.
  • Machine to Machine (M2M) communication is a type of data communication that includes one or more machines that do not require human interaction, such as sensors, meters, water meters,
  • the alarm device can be referred to as a user device. Since the number of user equipment in the M2M communication system is huge and is mostly powered by a battery, replacing the battery once for the M2M system is a great workload. In view of this, it is expected that the user equipment has low power consumption and long standby. time.
  • the base station in the idle mode of the M2M communication system, the base station periodically sends a paging message to the user equipment, so that the user equipment wakes up and sends and receives only the paging message sent by the base station at a specific interval. Data, while in other periods of time, is in a sleep state, that is, to close its own communication interface in order to reduce the battery power of the user equipment.
  • FIG. 1 shows a frame format of a paging message scheduling period in an existing M2M communication system.
  • a paging cycle (English: Paging Cycle, abbreviated as PC) includes a plurality of paging frames (English: Paging Frame), each paging frame contains several paging opportunities (English: Paging Occasion, abbreviation: PO), where PF is a radio frame, PO is a radio subframe, and paging scheduling is sent to the user equipment at the PO time.
  • the information, wherein the paging scheduling information is downlink control information (English: Downlink Control Information, DCI), used to indicate the location of the paging message, and the user equipment receives the paging scheduling message after the PO time.
  • DCI Downlink Control Information
  • the base station when the base station sends a paging message to the user equipment, only the transmission mechanism of the existing cellular system is adopted, and the coverage strength of the location where the user equipment is located is not considered.
  • the location where the user equipment is deployed is located in a corner, or the coverage area such as the basement is poor, the user equipment may not receive the paging message.
  • An embodiment of the present invention provides a paging method, device, and system, to solve the problem that a user equipment does not receive a paging message when the location coverage of the existing user equipment is poor.
  • an embodiment of the present invention provides a paging method, where the method includes:
  • the sending location, the air interface paging message includes a paging message of the user equipment.
  • the determining a coverage level of the user equipment includes:
  • the coverage level of the user equipment is the worst coverage level.
  • the sending according to the coverage level of the user equipment, the air interface paging to the user equipment
  • the message includes:
  • the MCS corresponding to the coverage level of the user equipment modulates and encodes the air interface paging message to the user equipment.
  • the receiving, by the base station, the paging message of the user equipment according to any one of the first aspect to the second possible implementation manner of the first aspect,
  • the base station receives a paging message of the user equipment sent by the mobility management entity MME or the serving general packet radio service technology support node SGSN.
  • the calculating a paging location of the user equipment includes:
  • the number of paging opportunities in the paging superframe is determined according to the length of the paging superframe and the downlink control information interval.
  • the method further includes:
  • the base station receives the retransmission indication information for instructing to resend the paging message of the user equipment, re-determining the coverage level of the user equipment;
  • the re-determining the coverage level of the user equipment includes:
  • the retransmission indication message received by the base station includes the current coverage level of the user equipment, determining that the coverage level of the user equipment is the current coverage level;
  • the retransmission indication message received by the base station does not include the current coverage level of the user equipment, reducing the coverage level of the user equipment to a coverage level of the next level, or determining the user equipment The coverage level is the worst coverage level.
  • an embodiment of the present invention provides a paging method, including:
  • the user equipment receives the paging scheduling information sent by the base station at the paging location, where the paging scheduling message is encoded according to the modulation and coding format MCS corresponding to the coverage level of the user equipment, and is used to indicate that the base station sends the paging scheduling information to the user equipment.
  • the location of the air interface paging message, the coverage level of the user equipment is reported by the user equipment to the MME/SGSN, and is sent by the MME/SGSN to the base station;
  • the user equipment decodes the paging scheduling information according to an MCS corresponding to a current coverage level of the user equipment.
  • the method further includes:
  • the user equipment successfully parses the paging scheduling information, receiving an air interface paging message sent by the base station according to the location indicated by the paging scheduling information, and acquiring the user equipment from the air interface paging message Paging message
  • the base station reports the current coverage level of the user equipment to the MME/SGSN.
  • the reporting, by the base station, the current coverage level of the user equipment to the MME/SGSN includes:
  • the user equipment reports a random access message carrying the current coverage level of the user equipment to the base station, and instructs the base station to report the current coverage level of the user equipment to the MME or the SGSN;
  • the user equipment reports, to the base station, a registration Attach message or a tracking area update TAU message or a routing area update RAU message that carries the current coverage of the user equipment, and indicates that the base station forwards the Attach message or the MME to the MME or the SGSN. Describe the TAU message or the RAU message.
  • an embodiment of the present invention provides a base station, including:
  • a receiving unit configured to receive a paging message of the user equipment, where the paging message includes a user identifier of the user equipment;
  • a calculating unit configured to calculate, according to the user identifier received by the receiving unit Describe the paging location of the user equipment
  • a determining unit configured to determine, according to the user identifier received by the receiving unit, a coverage level of the user equipment
  • a sending unit configured to send an air interface paging message to the user equipment according to the coverage level of the user equipment determined by the determining unit, and send paging scheduling information on a paging location calculated by the computing unit, where
  • the paging scheduling information is used to indicate a sending location of the air interface paging message, and the air interface paging message includes a paging message of the user equipment.
  • the determining unit is specifically configured to:
  • the coverage level of the user equipment is the worst coverage level.
  • the sending unit is specifically configured to:
  • the MCS corresponding to the coverage level of the user equipment is modulated and encoded by the MCS corresponding to the coverage level of the user equipment, and is sent to the user equipment according to a preset relationship between the preset coverage level and the modulation and coding format MCS.
  • the receiving unit is specifically configured to:
  • the calculating unit is specifically configured to:
  • Paging cycle configured according to the network, paging superframe density, and device of the user equipment Identifying a paging superframe in which the paging location is calculated;
  • the number of paging opportunities in the paging superframe is determined according to the length of the paging superframe and the downlink control information interval.
  • the determining unit is further configured to: if the receiving Receiving, by the unit, retransmission indication information for instructing to resend the paging message of the user equipment, re-determining the coverage level of the user equipment;
  • the sending unit is further configured to send an air interface paging message to the user equipment according to the coverage level of the user equipment that is determined by the determining unit.
  • the determining unit is specifically configured to:
  • the retransmission indication message received by the base station includes the current coverage level of the user equipment, determining that the coverage level of the user equipment is the current coverage level;
  • the retransmission indication message received by the base station does not include the current coverage level of the user equipment, reducing the coverage level of the user equipment to a coverage level of the next level, or determining the user equipment The coverage level is the worst coverage level.
  • an embodiment of the present invention provides a user equipment, including:
  • a receiving unit configured to receive, by the base station, the paging scheduling information, where the paging scheduling message is encoded according to the modulation and coding format MCS corresponding to the coverage level of the user equipment, and is used to indicate the base station to the user
  • MCS modulation and coding format
  • a parsing unit configured to decode the paging scheduling information according to an MCS corresponding to a current coverage level of the user equipment.
  • the user equipment in combination with the fourth aspect, if the user equipment successfully parses the paging scheduling information, the user equipment further includes:
  • An obtaining unit configured to: if the parsing unit successfully parses out the paging scheduling information, Receiving, by the location indicated by the paging scheduling information received by the receiving unit, an air interface paging message sent by the base station, and acquiring a paging message of the user equipment from the air interface paging message;
  • the reporting unit is configured to report the current coverage level of the user equipment to the base station if the parsing unit fails to parse the paging scheduling information.
  • the reporting unit is specifically configured to:
  • a random access message carrying a current coverage level of the user equipment, instructing the base station to report the current coverage level of the user equipment to the MME or the SGSN;
  • a registration Attach message or a tracking area update TAU message or a routing area update RAU message that carries the current coverage of the user equipment, instructing the base station to forward the Attach message or the TAU message to the MME or the SGSN or The RAU message.
  • an embodiment of the present invention provides a paging system, including: implementing, according to any one of the third aspect to the sixth possible implementation manner of the third aspect, the fourth base station, Any one of the second possible implementations of the four aspects implements the user equipment and the core network device;
  • the core network device is an MME or an SGSN.
  • an embodiment of the present invention provides a base station, including:
  • a communication unit configured to receive, by the receiver, a paging message to the user equipment of the machine; wherein the paging message includes a user identifier of the user equipment;
  • a processor configured to calculate, according to the communication unit, a user identifier, calculate a paging location of the user equipment, and determine a coverage level of the user equipment;
  • the communication unit is further configured to send an air interface paging message to the user equipment according to the coverage level of the user equipment determined by the processor, and send paging scheduling information on a paging location calculated by the processor.
  • the paging scheduling information is used to indicate a sending location of the air interface paging message, and the air interface paging message includes a paging message of the user equipment.
  • the processor is specifically configured to:
  • the coverage level of the user equipment is the worst coverage level.
  • the communication unit is specifically configured to:
  • the MCS corresponding to the coverage level of the user equipment is modulated and encoded by the MCS corresponding to the coverage level of the user equipment, and is sent to the user equipment according to a preset relationship between the preset coverage level and the modulation and coding format MCS.
  • the communication unit is specifically configured to:
  • the processor is specifically configured to:
  • the number of paging opportunities in the paging superframe is determined according to the length of the paging superframe and the downlink control information interval.
  • the processor is further configured to: if the communication unit receives the indication for resending Re-instruction information of the paging message of the user equipment, and then re-determining the coverage level of the user equipment;
  • the communication unit is further configured to send an air interface paging message to the user equipment according to the coverage level of the user equipment that is determined by the processor.
  • the processor is specifically configured to:
  • the retransmission indication message received by the base station includes the current coverage level of the user equipment, determining that the coverage level of the user equipment is the current coverage level;
  • the retransmission indication message received by the base station does not include the current coverage level of the user equipment, reducing the coverage level of the user equipment to a coverage level of the next level, or determining the user equipment The coverage level is the worst coverage level.
  • the seventh aspect of the present invention provides a user equipment, including:
  • a communication unit configured to receive, by the base station, the paging scheduling information, where the paging scheduling message is encoded according to the modulation and coding format MCS corresponding to the coverage level of the user equipment, and is used to indicate the base station to the user
  • MCS modulation and coding format
  • a processor configured to decode paging scheduling information received by the communications unit according to an MCS corresponding to a current coverage level of the user equipment.
  • the processor is further configured to: if the processor successfully parses the paging scheduling information, according to the paging scheduling information indication Receiving, by the location, the air interface paging message sent by the base station, and acquiring the paging message of the user equipment from the air interface paging message;
  • the communication unit is further configured to report, to the base station, a current coverage level of the user equipment if the processor fails to parse the paging scheduling information.
  • the communication unit is specifically configured to:
  • a random access message carrying a current coverage level of the user equipment instructing the base station to report the random access message to the MME or the SGSN, so that And the MME or the SGSN sends retransmission indication information for instructing to resend the paging message of the user equipment to the base station.
  • an embodiment of the present invention provides a paging system, including: implementing, according to any one of the sixth possible implementation manners of the sixth aspect to the sixth aspect, the seventh base station, Any one of the second possible implementations of the seven aspects implements the user equipment and the core network device;
  • the core network device is an MME or an SGSN.
  • an embodiment of the present invention provides a paging method, device, and system.
  • a base station receives a paging message of a user equipment
  • the base station calculates a paging location of the user equipment, and acquires a coverage level of the user equipment.
  • the sending location, the air interface paging message includes a paging message of the user equipment, and compared with the prior art, the base station in the M2M communication system sends a paging message to the user equipment according to the coverage level of the user equipment, not only User equipments in different coverage areas can correctly receive paging messages to a certain extent, and reduce the number of retransmissions of paging messages.
  • the existing base station sends the paging message to the user equipment, the coverage strength of the location where the user equipment is located is not considered, and the user equipment does not receive the paging message when the location coverage of the user equipment is poor.
  • 1 is a frame format of a paging message scheduling period in an existing M2M communication system
  • FIG. 2 is an application scenario of a paging method according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a paging method according to another embodiment of the present invention.
  • FIG. 4 is a frame format of a paging message scheduling period according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of a paging method according to another embodiment of the present invention.
  • FIG. 6 is a flowchart of a paging method according to another embodiment of the present invention.
  • FIG. 7 is a structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 8 is a structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 8 is a structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 8B is a structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 9 is a structural diagram of a paging system according to an embodiment of the present invention.
  • FIG. 10 is a structural diagram of a base station according to another embodiment of the present invention.
  • FIG. 11 is a structural diagram of a user equipment according to another embodiment of the present invention.
  • FIG. 12 is a structural diagram of a paging system according to another embodiment of the present invention.
  • the paging method provided by the embodiment of the present invention is applicable not only to the Long Term Evolution (LTE) network system, but also to any of the following network systems: Advanced Long Term Evolution (English: Advanced Long Term Evolution, Abbreviations: LTE-A), Universal Mobile Telecommunications System (UMTS) and Global System for Mobile Communication (GSM) systems, etc.
  • the communication system is applicable to the LTE system as an example.
  • the embodiment of the present invention is not limited.
  • FIG. 2 is a schematic diagram of an application scenario of a paging method according to an embodiment of the present invention.
  • the scenario may include: multiple user equipments, base stations, and core network devices; and a mobility management entity (English: Moblity Management Entity, abbreviation: MME);
  • MME Mobility Management Entity
  • the user equipment can also be called Machine Type Communication (English: Machine Type Communication, abbreviation: MTC), and can be any one of the devices without human interaction.
  • the station performs information interaction, and the user equipment can be in a position with a relatively high coverage level, such as a strong coverage area of an existing cellular network, or a location with a poor coverage level, such as a weak coverage area of an existing cellular network (corner, basement)
  • the core network device may be a mobility management entity (English: Moblity Management Entity, MME) connected to the base station through the S1 interface; or may be a service GPRS connected to the base station through the Gb interface (English: General Packet Radio) Service, Chinese: General Packet Radio Service Technology) Supporting Node (English: Serving GPRS Support Node, abbreviation: SGSN); for user equipments with strong coverage, the user equipment can be made without increasing the transmission gain of paging messages.
  • MME Mobility Management Entity Management Entity
  • the paging message is correctly received, and for the user equipment with poor coverage level, the corresponding processing of increasing the transmission gain of the paging message (such as increasing the transmission rate, changing the coding mode, and spreading) is required.
  • the user equipment receives the correct paging message, that is, according to the coverage level of the user equipment. Paging message to the user equipment for different process, in order to enable the user equipment receiving the paging message correctly.
  • the base station processes the paging message at a specific time according to the current coverage level of the user equipment, and then sends the paging message to the user equipment.
  • the user equipment is used to enable the user equipment to receive the paging message.
  • the paging method provided by the embodiment of the present invention is introduced below.
  • FIG. 3 is a flowchart of a paging method according to Embodiment 1 of the present invention. As shown in FIG. 3, the method may include:
  • the base station receives a paging message of the user equipment.
  • the base station may receive the paging message of the user equipment sent by the MME through the S1; or receive the paging message of the user equipment sent by the SGSN through the Gb interface.
  • the paging message includes a user identifier of the user equipment, and is used to wake up the user equipment in an idle state.
  • the base station calculates a paging location of the user equipment according to the user identifier of the user equipment.
  • each paging cycle includes several paging superframes (Paging).
  • Paging paging superframe
  • each paging superframe includes a number of paging opportunities (Paging Occasion), wherein the paging opportunity is a radio frame, which is equivalent to the paging frame in FIG. 1, and the paging opportunity is a paging location for carrying Downlink Control Information (DCI), such as paging scheduling information
  • DCI Downlink Control Information
  • Calculating a paging opportunity in which the paging location is located according to the number of paging opportunities in a paging superframe, the device identifier of the user equipment, and the paging superframe density; as per the formula: PO floor(UE_ID/N) mod Ns Determine the paging opportunity in which the paging message is located.
  • UE_ID represents the device identifier of the user equipment, and is used to identify the user equipment, and may be any one of the following identifiers: International Mobile Subscriber Identification Number (IMI), temporary Identification code (English: Temporary Mobile Subscriber Identity, abbreviation: TMSI), Globally Unique Temporary UE Identity, International Mobile Equipment Identity (IMEI).
  • IMI International Mobile Subscriber Identification Number
  • TMSI Temporary Mobile Subscriber Identity
  • IMEI International Mobile Equipment Identity
  • T represents the paging cycle
  • the integer value of the divisor of the interval is rounded up; for example, in the current M2M communication system, the length of the superframe is 64 radio frames. In this case, if the DCI interval is 64 radio frames, the Ns is the most. It is 1; if the DCI interval is 32 radio frames, Ns is at most 2; if the DCI interval is 1 radio frame, the maximum number of Ns is 64.
  • the base station determines a coverage level of the user equipment.
  • the coverage level is used to indicate the network coverage strength of the location where the user equipment is located, and may be divided into different levels according to system specifications; usually, three coverage levels are designed in the narrowband system, namely: level 0, level 1 Level 2, the higher the coverage level, the smaller the network coverage strength, and the more need to adopt the coding modulation method that can enhance the network coverage strength.
  • the coverage level may be included in the paging message or pre-stored in the base station.
  • the base station determines that the coverage level of the user equipment is the worst coverage level.
  • the base station sends an air interface paging message to the user equipment according to the coverage level of the user equipment, and sends paging scheduling information on the paging location, where the paging scheduling information is used to indicate the air interface.
  • the air interface paging message is one or more M2M paging messages transmitted on the same air interface.
  • the base station may combine the paging messages with the same paging location and coverage level of the user equipment in the same paging record list;
  • the MCS corresponding to the coverage level of the user equipment is modulated and encoded by the MCS corresponding to the coverage level of the user equipment, and is sent to the user equipment according to a preset relationship between the preset coverage level and the modulation and coding format MCS.
  • the paging record list includes: a paging message, and a correspondence between the paging message and the user equipment.
  • the correspondence between the coverage level and the modulation and coding format MCS is set as required in the M2M communication process, and is not limited in the embodiment of the present invention.
  • the paging opportunity is the sixth radio frame, and the coverage level of the user equipment 1 is 1, the paging position of the user equipment 2 is found.
  • the paging frame is the first superframe
  • the paging opportunity is the sixth radio frame
  • the coverage level of the user equipment 2 is 1
  • the paging superframe in the paging position of the user equipment 3 is the first superframe, the paging opportunity.
  • the paging messages of the user equipment 1, the user equipment 2, and the user equipment 3 may be combined in the same paging record list, and the paging record is recorded.
  • the list is launched through an air interface.
  • the base station may send a paging message by using a default coding and modulation mode (such as a coded modulation mode corresponding to the worst coverage level); the corresponding code modulation may be adopted according to the coverage level of the user equipment sent by the MME/SGSN.
  • the paging message is transmitted in a manner according to the coverage level of the user equipment stored in the base station, and the paging message set is transmitted in the corresponding code modulation mode; the paging message is sent to the user equipment according to the coverage level of the user equipment, to a certain extent.
  • the user equipments at different coverage levels obtain the paging message corresponding to the user, and return a response message indicating that the paging succeeds to the MME/SGSN.
  • the coverage level of the user equipment determined by the base station cannot accurately represent the current coverage level of the user equipment, if The MCS corresponding to the coverage level performs the code modulation and transmission of the paging message, so that the user equipment cannot obtain the paging message because the paging scheduling information cannot be parsed, thereby causing the retransmission of the paging message. Therefore, in order to reduce the retransmission user The number of paging messages of the device. Further, the method further includes:
  • the base station receives the retransmission indication information for instructing to resend the paging message of the user equipment, re-determining the coverage level of the user equipment;
  • the re-determining the coverage level of the user equipment may include:
  • the retransmission indication message received by the base station includes the current coverage level of the user equipment, determining that the coverage level of the user equipment is the current coverage level;
  • the coverage level of the user equipment is reduced to a coverage level of the next level, or the coverage of the user equipment is determined.
  • the rating is the worst coverage level.
  • the embodiment of the present invention provides a paging method.
  • a base station receives a paging message of a user equipment
  • the base station calculates a paging location of the user equipment, and determines a coverage level of the user equipment.
  • the coverage level of the device sends an air interface paging message to the user equipment, and sends paging scheduling information on the paging location; wherein the paging scheduling information is used to indicate a sending location of the air interface paging message,
  • the air interface paging message includes the paging message of the user equipment, and the base station sends a paging message to the user equipment according to the coverage level of the user equipment in the M2M communication system, so that the user equipments in different coverage areas are not only to a certain extent
  • the paging message can be correctly received, and the number of times of resending the paging message is reduced; the existing base station is prevented from transmitting the paging message to the user equipment without considering the coverage strength of the location where the user equipment is located, and the location of the user equipment is caused.
  • the coverage strength is very poor, the user equipment does not receive the paging message.
  • FIG. 5 is a flowchart of a paging method according to Embodiment 2 of the present invention. As shown in FIG. 5, the method may include:
  • the user equipment receives the paging scheduling information sent by the base station at the paging location.
  • the paging scheduling message is encoded according to the modulation and coding format MCS corresponding to the coverage level of the user equipment, and is used to indicate a location where the air interface paging message sent by the base station to the user equipment is located, where the user equipment
  • the coverage level is reported by the user equipment to the MME/SGSN, and is sent by the MME/SGSN to the base station;
  • the air interface paging message includes a paging message record list, where the paging message record list includes at least one paging message of the user equipment, and a correspondence between the paging message of the user equipment and the user equipment; wherein, the paging message list is
  • the paging location and coverage level of the paging message of each user equipment are the same as the paging location and coverage level of the user equipment.
  • the method for the user equipment to calculate the paging location is the same as the method for the base station to calculate the paging location, and details are not described herein again.
  • the user equipment decodes the paging scheduling information according to an MCS corresponding to a current coverage level of the user equipment.
  • the user equipment can determine its current coverage level according to the reference signal receiving power (English: Reference Signal Receiving Power, abbreviation: RSRP).
  • RSRP Reference Signal Receiving Power
  • the user equipment successfully parses the paging scheduling information it indicates that the coverage level used by the base station to send the paging scheduling information is the same as the current coverage level of the user equipment or lower than the current coverage level of the user equipment.
  • the method also includes:
  • the user equipment receives the air interface paging message sent by the base station according to the location indicated by the paging scheduling information, and obtains the paging message of the user equipment from the air interface paging message.
  • the user equipment parses the paging scheduling information, the user equipment needs to report the user equipment to the MME/SGSN. Current coverage level.
  • the user equipment reporting the current coverage level of the user equipment to the MME/SGSN may include:
  • the user equipment reports a random access message carrying the current coverage level of the user equipment to the base station, and instructs the base station to report the user equipment to the MME or the SGSN.
  • Current coverage level
  • the user equipment reports, to the base station, a registered Attach message or a Tracking Area Update (TAU) message or a Route Area Update (RAU) message, which is currently covered by the user equipment, indicating that the base station is The MME or the SGSN forwards the Attach message or the TAU message or the RAU message.
  • TAU Tracking Area Update
  • RAU Route Area Update
  • the embodiment of the present invention provides a paging method. After the user equipment receives the paging scheduling information sent by the base station, if the paging scheduling information is successfully parsed, the location indicated by the paging scheduling information is used.
  • the current coverage level is such that the base station resends the message to the user equipment according to the current coverage level of the user equipment when the paging message is resent to the user equipment, so that the base station in the M2M communication system sends the information to the user equipment according to the coverage level of the user equipment.
  • the call message not only enables the user equipments in different coverage areas to correctly receive the paging message to a certain extent, but also reduces the number of times the paging message is retransmitted; the existing base station is not considered when sending the paging message to the user equipment.
  • FIG. 6 is a flowchart of a paging method according to an embodiment of the present invention. As shown in FIG. 6, the method may include:
  • the core network device sends a paging message of the user equipment to the base station.
  • the core network device sends a paging message of the user equipment to the base station through the S1 interface or the Gb interface.
  • the paging message is used to wake up the user equipment in the idle state.
  • the base station calculates a paging location of the user equipment.
  • the paging position is determined by the paging superframe and the paging opportunity, and is used for sending paging tone
  • the paging information is used to indicate the sending location of the air interface paging message sent by the base station to the user equipment.
  • the base station determines a coverage level of the user equipment.
  • the coverage level is used to indicate the network coverage strength of the location where the user equipment is located, and may be divided into different levels according to system specifications; usually, three coverage levels are designed in the narrowband system, namely: level 0, level 1 Level 2, the higher the coverage level, the smaller the network coverage strength, and the more need to adopt the coding modulation method that can enhance the network coverage strength.
  • the coverage level may be included in the paging message or pre-stored in the base station.
  • the base station determines that the coverage level of the user equipment is the worst coverage level.
  • the base station sends an air interface paging message to the user equipment according to the coverage level of the user equipment, and sends paging scheduling information on the paging location.
  • the paging scheduling information is used to indicate a sending location of the air interface paging message, where the air interface paging message includes a paging message of the user equipment; and the air interface paging message is a transmitting on the same air interface.
  • the base station may combine the paging messages with the same paging location and coverage level of the user equipment in the same paging record list;
  • Adjusting the air interface paging message by using an MCS corresponding to the coverage level of the user equipment according to a preset relationship between the coverage level and the modulation and coding format MCS.
  • the encoding is sent to the user equipment.
  • the paging record list includes: a paging message, and a correspondence between the paging message and the user equipment.
  • the user equipment receives paging scheduling information sent by the base station at the paging location.
  • the method for the user equipment to calculate the paging location is the same as the method for the base station to calculate the paging location.
  • the user equipment parses the paging scheduling message. If the user equipment successfully parses the paging scheduling information, step 607-608 is performed. If the user equipment fails to parse the paging scheduling information, step 609 is performed. -610.
  • the user equipment may parse the paging scheduling message by using a modulation and coding manner corresponding to the coverage level determined by the user equipment itself.
  • the user equipment can determine its own coverage level according to the reference signal receiving power (English: Reference Signal Receiving Power, abbreviation: RSRP).
  • RSRP Reference Signal Receiving Power
  • the user equipment receives the air interface paging message sent by the base station according to the location indicated by the paging scheduling information, and obtains the paging message of the user equipment from the air interface paging message.
  • the user equipment returns, by using the base station, a response message indicating that the paging succeeds to the core network device.
  • the user equipment reports, to the base station, a random access message that carries a current coverage level of the user equipment.
  • the base station reports, by using the first S1 or Gb interface, a random access message carrying the current coverage level of the user equipment to the core network device.
  • step 611 When the core network device does not receive any response message within a preset time, retransmitting the indication information to the base station by using the second S1 or Gb interface, where the retransmission indication information is used to indicate that the user is resent And the retransmission indication information of the paging message of the device, if the retransmission indication message includes the current coverage level of the user equipment, step 612 is performed; if the retransmission indication message does not include the current coverage top level of the user equipment, Go to step 613.
  • the coverage of the user equipment obtained by the base station according to the second S1 or Gb interface.
  • the level resends the paging message to the user equipment.
  • the base station re-determines the coverage level of the user equipment to be the coverage level of the next level, or the worst coverage level.
  • the base station sends a paging message to the user equipment according to the re-determined coverage level of the user equipment.
  • the embodiment of the present invention provides a paging method.
  • the base station After receiving the paging message of the user equipment sent by the core network device, the base station calculates a paging location of the user equipment, and sends an air interface paging message to the user equipment according to the determined coverage level of the user equipment, and Sending paging scheduling information on the paging location; after receiving the paging scheduling information sent by the base station, the user equipment parses the paging scheduling message to obtain a paging message, and if the parsing is successful, returns a response message; if the parsing fails, the reporting is performed.
  • the current coverage level of the user equipment is such that the base station resends the paging message to the user equipment according to the current coverage level, or does not report the current coverage level, so that the base station resends the paging message to the user equipment according to the re-determined coverage level;
  • the base station in the communication system sends a paging message to the user equipment according to the coverage level of the user equipment, so that the user equipments in different coverage areas can correctly receive the paging message to a certain extent, and the number of times of resending the paging message is reduced; It avoids that the existing base station does not consider the user equipment when sending a paging message to the user equipment. Strength of the cover at a position, which led to the location of the user equipment is poor strength of the cover, the user equipment receives the paging message not a problem.
  • FIG. 7 is a structural diagram of a base station 70, where the base station 70 performs the paging method according to the first embodiment. As shown in FIG. 7, the base station 70 may include:
  • the receiving unit 701 is configured to receive a paging message of the user equipment.
  • the paging message includes a user identifier of the user equipment, and is used to wake up the user equipment in an idle state.
  • the calculating unit 702 is configured to calculate a paging location of the user equipment according to the user identifier received by the receiving unit 701.
  • the paging location is used to send paging scheduling information; the paging scheduling information is used to indicate that the base station sends the location of the air interface paging message to the user equipment.
  • the frame format of the paging message scheduling period in the embodiment of the present invention is different from that in FIG. 1.
  • each paging cycle includes a plurality of paging super frames (Paging Super Frame).
  • the paging superframe includes a number of paging opportunities (Paging Occasion), wherein the paging opportunity is a radio frame, which is equivalent to the paging frame in FIG.
  • the paging opportunity is a paging location for carrying downlink control information (Downlink) Control Information (DCI), such as paging scheduling information, each downlink control information occupies one radio subframe, which is equivalent to occupying one paging opportunity in FIG.
  • DCI downlink control information
  • each downlink control information occupies one radio subframe, which is equivalent to occupying one paging opportunity in FIG.
  • the determining unit 703 is configured to determine, according to the user identifier received by the receiving unit 701, a coverage level of the user equipment.
  • the coverage level is used to indicate the network coverage strength of the location where the user equipment is located, and may be divided into different levels according to system specifications; usually, three coverage levels are designed in the narrowband system, namely: level 0, level 1 Level 2, the higher the coverage level, the smaller the network coverage strength, and the more need to adopt the coding modulation method that can enhance the network coverage strength.
  • the coverage level may be included in the paging message or pre-stored in the base station.
  • the determining unit 703 determines that the coverage level of the user equipment is the worst coverage level.
  • the sending unit 704 is configured to send an air interface paging message to the user equipment according to the coverage level of the user equipment determined by the determining unit 703, and send a paging schedule on the paging location calculated by the calculating unit 702. Information, wherein the paging scheduling information is used to indicate a sending location of the air interface paging message, and the air interface paging message includes a paging message of the user equipment.
  • the air interface paging message is one or more M2M paging messages transmitted on the same air interface.
  • the receiving unit 701 is specifically configured to:
  • calculating unit 702 is specifically configured to:
  • Calculating the paging opportunity according to the number of paging opportunities in a paging superframe, the device identifier of the user equipment, and the paging superframe density; determining the paging location according to the formula: PO floor(UE_ID/N) mod Ns The paging opportunity you are in.
  • UE_ID represents the device identifier of the user equipment, and is used to identify the user equipment, and may be any one of the following identifiers: International Mobile Subscriber Identification Number (IMI), temporary Identification code (English: Temporary Mobile Subscriber Identity, abbreviation: TMSI), Globally Unique Temporary UE Identity, International Mobile Equipment Identity (IMEI).
  • IMI International Mobile Subscriber Identification Number
  • TMSI Temporary Mobile Subscriber Identity
  • IMEI International Mobile Equipment Identity
  • T represents the paging cycle
  • the length of the call superframe and the divisor of the downlink control information interval are rounded up; for example, in the current M2M communication system, the length of the superframe is 64 radio frames. In this case, if the DCI interval is For 64 radio frames, Ns is at most 1. If the DCI interval is 32 radio frames, Ns is at most 2. If the DCI interval is 1 radio frame, the maximum number of Ns is 64.
  • sending unit 704 is specifically configured to:
  • the MCS corresponding to the coverage level of the user equipment is modulated and encoded by the MCS corresponding to the coverage level of the user equipment, and is sent to the user equipment according to a preset relationship between the preset coverage level and the modulation and coding format MCS.
  • the paging record list includes: a paging message, and a correspondence between the paging message and the user equipment.
  • the correspondence between the coverage level and the modulation and coding format MCS is set as required in the M2M communication process, and is not limited in the embodiment of the present invention.
  • the paging opportunity is the sixth radio frame, and the coverage level of the user equipment 1 is 1, the paging position of the user equipment 2 is found.
  • the paging frame is the first superframe
  • the paging opportunity is the sixth radio frame
  • the coverage level of the user equipment 2 is 1
  • the paging superframe in the paging position of the user equipment 3 is the first superframe, the paging opportunity.
  • the paging messages of the user equipment 1, the user equipment 2, and the user equipment 3 may be combined in the same paging record list, and the paging record is recorded.
  • the list is launched through an air interface.
  • the base station can use the default coding and modulation mode (such as the coded modulation mode corresponding to the worst coverage level) to send the paging message; the paging message can be transmitted according to the coverage level of the user equipment sent by the MME/SGSN by using the corresponding code modulation mode.
  • the paging message set may also be transmitted according to the coverage level of the user equipment stored in the base station, and the paging message set is transmitted according to the coverage level of the user equipment, so that the paging message is sent to the user equipment to a certain extent.
  • the user equipment of the level determines the paging message to its own, and returns a response message indicating that the paging is successful to the MME/SGSN.
  • the coverage level of the user equipment determined by the base station cannot accurately represent the current coverage level of the user equipment, if the coverage level is corresponding to the coverage level.
  • the MCS performs the code modulation and sends the paging message, so that the user equipment cannot obtain the paging message because the paging scheduling information cannot be parsed, thereby causing the retransmission paging message.
  • the determining unit 703 is further configured to: if the receiving unit 701 receives the retransmission indication for instructing to resend the paging message of the user equipment Re-determining the coverage level of the user equipment;
  • the sending unit 704 is further configured to send an air interface paging message to the user equipment according to the coverage level of the user equipment that is determined by the determining unit 703.
  • determining unit 703 is specifically configured to:
  • the retransmission indication message received by the receiving unit 701 includes the current coverage level of the user equipment, determining that the coverage level of the user equipment is the current coverage level;
  • the retransmission indication message received by the receiving unit 701 does not include the current coverage level of the user equipment, reducing the coverage level of the user equipment to a coverage level of the next level, or determining the The coverage level of the user equipment is the worst coverage level.
  • an embodiment of the present invention provides a base station, when a base station receives a paging message of a user equipment, calculates a paging location of the user equipment, and determines a coverage level of the user equipment;
  • the coverage level sends an air interface paging message to the user equipment, and sends paging scheduling information on the paging location; wherein the paging scheduling information is used to indicate a sending location of the air interface paging message,
  • the air interface paging message includes the paging message of the user equipment, and the base station in the M2M communication system sends a paging message to the user equipment according to the coverage level of the user equipment, so that the user equipments in different coverage areas can be correct to a certain extent.
  • FIG. 8 is a structural diagram of the user equipment 80, where the user equipment user performs the paging method described in Embodiment 2, as shown in FIG. include:
  • the receiving unit 801 is configured to receive, by the base station, paging scheduling information at the paging location.
  • the paging scheduling message is encoded according to the modulation and coding format MCS corresponding to the coverage level of the user equipment, and is used to indicate a location where the air interface paging message sent by the base station to the user equipment is located, where the user equipment
  • the coverage level is reported by the user equipment to the MME/SGSN, and is sent by the MME/SGSN to the base station;
  • the air interface paging message includes a paging message record list, where the paging message record list includes at least one paging message of the user equipment, and a correspondence between the paging message of the user equipment and the user equipment; wherein, the paging message list is
  • the paging location and coverage level of the paging message of each user equipment are the same as the paging location and coverage level of the user equipment.
  • the method for the user equipment to calculate the paging location is the same as the method for the base station to calculate the paging location, and details are not described herein again.
  • the parsing unit 802 is configured to decode the paging scheduling information received by the receiving unit 801 according to the MCS corresponding to the current coverage level of the user equipment.
  • the parsing unit 802 successfully parses the paging scheduling information, it indicates that the coverage level used by the base station to send the paging scheduling information is the same as the current coverage level of the user equipment or lower than the current coverage level of the user equipment.
  • the user equipment further includes:
  • the obtaining unit 803 is configured to receive, according to the location indicated by the paging scheduling information, an air interface paging message sent by the base station, and obtain a paging message of the user equipment from the air interface paging message.
  • the parsing unit 802 fails to parse the paging scheduling information, it indicates that the coverage level used by the base station to send the paging scheduling information is higher than the current coverage level of the user equipment.
  • the user equipment further includes :
  • the reporting unit 804 is configured to report the current coverage level of the user equipment to the MME/SGSN.
  • reporting unit 804 is specifically configured to:
  • a random access cancellation carrying a current coverage level of the user equipment Instructing the base station to report the current coverage level of the user equipment to the MME or the SGSN;
  • a registration Attach message or a tracking area update TAU message or a routing area update RAU message that carries the current coverage of the user equipment, instructing the base station to forward the Attach message or the TAU message to the MME or the SGSN or The RAU message.
  • the embodiment of the present invention provides a user equipment. After receiving the paging scheduling information sent by the base station, if the user equipment successfully parses the paging scheduling information, the location is received according to the paging scheduling information.
  • the air interface paging message sent by the base station acquires a paging message of the user equipment from the air interface paging message; if the paging scheduling information fails to be parsed, the current information of the user equipment is reported to the base station
  • the coverage level is such that the base station resends the message to the user equipment according to the current coverage level of the user equipment when retransmitting the paging message to the user equipment, so that the base station sends the paging to the user equipment according to the coverage level of the user equipment in the M2M communication system.
  • the message not only enables the user equipments in different coverage areas to correctly receive the paging message to a certain extent, but also reduces the number of retransmissions of the paging message; and avoids the fact that the existing base station does not consider the user when sending the paging message to the user equipment.
  • FIG. 9 is a structural diagram of a paging system for performing the paging method according to Embodiment 3, as shown in FIG. 9, the paging system may include: a base station 90, at least one user Device 91 and core network device 92;
  • the base station 90 has the same functions as the base station 70 of the foregoing four embodiments.
  • the user equipment 91 has the same functions as the user equipments 80 of the above-described embodiments, and details are not described herein again.
  • the core network device 92 may be an MME or an SGSN, configured to send a paging message of the M2M91 to the base station 90, or send retransmission indication information for instructing to resend the paging message of the user equipment.
  • the embodiment of the present invention provides a paging system, after receiving a paging message of a user equipment sent by a core network device, the base station calculates a paging location of the user equipment, And sending an air interface paging message to the user equipment according to the determined coverage level of the user equipment, and sending paging scheduling information on the paging location; after receiving the paging scheduling information sent by the base station, the user equipment receives the paging scheduling information, The paging scheduling message is parsed, and the paging message is obtained. If the parsing is successful, the response message is returned.
  • the base station in the M2M communication system sends a paging message to the user equipment according to the coverage level of the user equipment, not only in different coverage areas.
  • the user equipment can correctly receive the paging message to a certain extent, and reduce the number of times the paging message is retransmitted; the existing base station does not consider the coverage strength of the location where the user equipment is located when sending the paging message to the user equipment. When the location of the user equipment is poor, the user equipment does not receive it. Call the problem of the message.
  • FIG. 10 is a structural diagram of a base station, where the base station is configured to perform the paging method according to the first embodiment.
  • the base station 100 may include: a communication unit 1001, a processor 1002, a memory 1003, At least one communication bus 1004 for implementing connections and mutual communication between the devices;
  • the communication unit 1001 is configured to perform data transmission with an external network element.
  • the processor 1002 may be a central processing unit (English: central processing unit, referred to as CPU);
  • the memory 1003 may be a volatile memory (English: volatile memory), such as random access memory (English: random-access memory, abbreviation: RAM); or non-volatile memory (English: non-volatile memory), for example Read-only memory (English: read-only memory, abbreviation: ROM), flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation: HDD) or solid state drive (English: solid-state drive, abbreviation :SSD); or a combination of the above types of memory and providing instructions and data to the processor 1002.
  • volatile memory such as random access memory (English: random-access memory, abbreviation: RAM); or non-volatile memory (English: non-volatile memory), for example Read-only memory (English: read-only memory, abbreviation: ROM), flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation: HDD) or solid state drive (English: solid-state drive, abbreviation :SSD); or a combination
  • the communication unit 1001 is configured to receive a paging message of the user equipment.
  • the paging message includes a user identifier of the user equipment, and is used to wake up idle. User equipment in the state.
  • the processor 1002 is configured to calculate a paging location of the user equipment according to the user identifier received by the communication unit 1001.
  • each paging cycle includes several paging superframes (Paging).
  • Paging paging superframe
  • each paging superframe includes a number of paging opportunities (Paging Occasion), wherein the paging opportunity is a radio frame, which is equivalent to the paging frame in FIG. 1, and the paging opportunity is a paging location for carrying Downlink Control Information (DCI), such as paging scheduling information
  • DCI Downlink Control Information
  • the processor 1002 is further configured to determine, according to a user identifier received by the communication unit 1001, a coverage level of the user equipment.
  • the coverage level is used to indicate the network coverage strength of the location where the user equipment is located, and may be divided into different levels according to system specifications; usually, three coverage levels are designed in the narrowband system, namely: level 0, level 1 Level 2, the higher the coverage level, the smaller the network coverage strength, and the more need to adopt the coding modulation method that can enhance the network coverage strength.
  • the coverage level may be included in the paging message or pre-stored in the base station.
  • the processor 1002 determines that the coverage level of the user equipment is the worst coverage level.
  • the communication unit 1001 is further configured to send an air interface paging message to the user equipment according to the coverage level of the user equipment determined by the processor 1002, and send paging scheduling information on the paging location calculated by the processor 1002.
  • the paging scheduling information is used to indicate a sending location of the air interface paging message, and the air interface paging message includes a paging message of the user equipment.
  • the air interface paging message is one or more of the transmissions on the same air interface M2M paging message
  • the communication unit 1001 is specifically configured to:
  • processor 1002 is specifically configured to:
  • Calculating the paging superframe according to a paging period configured by the network, a paging superframe density, and a device identifier of the user equipment; determining a paging location according to a formula: SFN mod T (T div N)*(UE_ID mod N) The paging superframe in which it is located;
  • UE_ID represents the device identifier of the user equipment, and is used to identify the user equipment, and may be any one of the following identifiers: International Mobile Subscriber Identification Number (IMI), temporary Identification code (English: Temporary Mobile Subscriber Identity, abbreviation: TMSI), Globally Unique Temporary UE Identity, International Mobile Equipment Identity (IMEI).
  • IMI International Mobile Subscriber Identification Number
  • TMSI Temporary Mobile Subscriber Identity
  • IMEI International Mobile Equipment Identity
  • T represents the paging cycle
  • the length of the call superframe and the divisor of the downlink control information interval are rounded up; for example, in the current M2M communication system, the length of the superframe is 64 radio frames. In this case, if the DCI interval is For 64 radio frames, Ns is at most 1. If the DCI interval is 32 radio frames, Ns is at most 2. If the DCI interval is 1 radio frame, the Ns is up to 64. One.
  • the communication unit 1001 is specifically configured to:
  • the MCS corresponding to the coverage level of the user equipment is modulated and encoded by the MCS corresponding to the coverage level of the user equipment, and is sent to the user equipment according to a preset relationship between the preset coverage level and the modulation and coding format MCS.
  • the paging record list includes: a paging message, and a correspondence between the paging message and the user equipment.
  • the correspondence between the coverage level and the modulation and coding format MCS is set as required in the M2M communication process, and is not limited in the embodiment of the present invention.
  • the paging opportunity is the sixth radio frame, and the coverage level of the user equipment 1 is 1, the paging position of the user equipment 2 is found.
  • the paging frame is the first superframe
  • the paging opportunity is the sixth radio frame
  • the coverage level of the user equipment 2 is 1
  • the paging superframe in the paging position of the user equipment 3 is the first superframe, the paging opportunity.
  • the paging messages of the user equipment 1, the user equipment 2, and the user equipment 3 may be combined in the same paging record list, and the paging record is recorded.
  • the list is launched through an air interface.
  • the base station can use the default coding and modulation mode (such as the coded modulation mode corresponding to the worst coverage level) to send the paging message; the paging message can be transmitted according to the coverage level of the user equipment sent by the MME/SGSN by using the corresponding code modulation mode. ; can also use the corresponding code adjustment according to the coverage level of the user equipment stored in the base station
  • the paging message set is transmitted in the system mode; the paging message is sent to the user equipment according to the coverage level of the user equipment, and the user equipments in different coverage levels are determined to the paging message corresponding to the user equipment to the MME/SGSN. Returns a response message indicating the success of the page.
  • the coverage level of the user equipment determined by the base station cannot accurately represent the current coverage level of the user equipment, if the coverage level is corresponding to the coverage level.
  • the MCS performs the code modulation and sends the paging message, so that the user equipment cannot obtain the paging message because the paging scheduling information cannot be parsed, thereby causing the retransmission paging message.
  • the processor 1002 is further configured to: if the communication unit 1001 receives a retransmission indication for instructing to resend the paging message of the user equipment Re-determining the coverage level of the user equipment;
  • the communication unit 1001 is further configured to send an air interface paging message to the user equipment according to the coverage level of the user equipment that is determined by the processor 1002.
  • processor 1002 is specifically configured to:
  • the retransmission indication message received by the communication unit 1001 includes the current coverage level of the user equipment, determining that the coverage level of the user equipment is the current coverage level;
  • the retransmission indication message received by the communication unit 1001 does not include the current coverage level of the user equipment, reduce the coverage level of the user equipment to the coverage level of the next level, or determine the The coverage level of the user equipment is the worst coverage level.
  • an embodiment of the present invention provides a base station, when a base station receives a paging message of a user equipment, calculates a paging location of the user equipment, and determines a coverage level of the user equipment;
  • the coverage level sends an air interface paging message to the user equipment, and sends paging scheduling information on the paging location; wherein the paging scheduling information is used to indicate a sending location of the air interface paging message,
  • the air interface paging message includes the paging message of the user equipment, and the base station in the M2M communication system sends a paging message to the user equipment according to the coverage level of the user equipment, so that the user equipments in different coverage areas can be correct to a certain extent.
  • Receiving a paging message reducing the number of retransmissions of paging messages; avoiding existing base stations to user equipment
  • the coverage strength of the location where the user equipment is located is not considered, and the user equipment does not receive the paging message when the location coverage of the user equipment is poor.
  • FIG. 11 is a structural diagram of a user equipment, where the user equipment is used to perform the paging method according to the second embodiment.
  • the user equipment 110 may include: a communication unit 1101, a processor 1102. a memory 1103, at least one communication bus 1104, for implementing connection and mutual communication between the devices;
  • the communication unit 1101 is configured to perform data transmission with an external network element.
  • the processor 1102 may be a central processing unit (English: central processing unit, referred to as CPU);
  • the memory 1103 may be a volatile memory (English: volatile memory), such as random access memory (English: random-access memory, abbreviation: RAM); or non-volatile memory (English: non-volatile memory), for example Read-only memory (English: read-only memory, abbreviation: ROM), flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation: HDD) or solid state drive (English: solid-state drive, abbreviation :SSD); or a combination of the above types of memory and providing instructions and data to the processor 1102.
  • volatile memory such as random access memory (English: random-access memory, abbreviation: RAM); or non-volatile memory (English: non-volatile memory), for example Read-only memory (English: read-only memory, abbreviation: ROM), flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation: HDD) or solid state drive (English: solid-state drive, abbreviation :SSD); or a combination
  • the communication unit 1101 is configured to receive, by the base station, the paging scheduling information at the paging location.
  • the paging scheduling message is encoded according to the modulation and coding format MCS corresponding to the coverage level of the user equipment, and is used to indicate a location where the air interface paging message sent by the base station to the user equipment is located, where the user equipment
  • the coverage level is reported by the user equipment to the MME/SGSN, and is sent by the MME/SGSN to the base station;
  • the air interface paging message includes a paging message record list, where the paging message record list includes at least one paging message of the user equipment, and a correspondence between the paging message of the user equipment and the user equipment; wherein, the paging message list is
  • the paging location and coverage level of the paging message of each user equipment are the same as the paging location and coverage level of the user equipment.
  • the method for the user equipment to calculate the paging location is the same as the method for the base station to calculate the paging location, and details are not described herein again.
  • the processor 1102 is configured to decode, according to the MCS corresponding to the current coverage level of the user equipment, the paging scheduling information received by the communication unit 1101.
  • the processor 1102 is further configured to: if the processor 1102 successfully parses the paging scheduling information, the coverage level used by the base station to send paging scheduling information is the same as the current coverage level of the user equipment or The air interface paging message sent by the base station is received according to the location indicated by the paging scheduling information, and the paging message of the user equipment is determined from the air interface paging message.
  • the communication unit 1101 is further configured to: if the user equipment parses the paging scheduling information, the coverage level used by the base station to send the paging scheduling information is higher than the current coverage level of the user equipment, The MME/SGSN reports the current coverage level of the user equipment.
  • the communication unit 1101 is specifically configured to:
  • a random access message carrying a current coverage level of the user equipment, instructing the base station to report the current coverage level of the user equipment to the MME or the SGSN;
  • a registration Attach message or a tracking area update TAU message or a routing area update RAU message that carries the current coverage of the user equipment, instructing the base station to forward the Attach message or the TAU message to the MME or the SGSN or The RAU message.
  • the embodiment of the present invention provides a user equipment. After receiving the paging scheduling information sent by the base station, if the user equipment successfully parses the paging scheduling information, the location is received according to the paging scheduling information.
  • the air interface paging message sent by the base station acquires a paging message of the user equipment from the air interface paging message; if the paging scheduling information fails to be parsed, the current information of the user equipment is reported to the base station
  • the coverage level is such that the base station resends the message to the user equipment according to the current coverage level of the user equipment when retransmitting the paging message to the user equipment, so that the base station sends the paging to the user equipment according to the coverage level of the user equipment in the M2M communication system.
  • the message not only enables user equipments in different coverage areas to correctly receive paging messages to a certain extent, The number of times of resending the paging message is reduced; the existing base station is prevented from transmitting the paging message to the user equipment, and the coverage strength of the location where the user equipment is located is not considered, and the user equipment is in a position where the coverage strength of the user equipment is poor.
  • the problem of not receiving a paging message is not only enables user equipments in different coverage areas to correctly receive paging messages to a certain extent, The number of times of resending the paging message is reduced; the existing base station is prevented from transmitting the paging message to the user equipment, and the coverage strength of the location where the user equipment is located is not considered, and the user equipment is in a position where the coverage strength of the user equipment is poor.
  • FIG 12 is a block diagram of a paging system for performing the paging method of the third embodiment.
  • the paging system may include:
  • a base station 120 at least one user equipment 121, and a core network device 122;
  • the base station 120 has the same function as the base station 100 of the seventh embodiment.
  • the user equipment 121 has the same functions as the user equipment 110 of the foregoing eight embodiments, and details are not described herein.
  • the core network device 122 may be an MME or an SGSN, configured to send a paging message of the M2M121 to the base station 120, or send retransmission indication information for instructing to resend the paging message of the user equipment.
  • an embodiment of the present invention provides a paging system, after receiving a paging message of a user equipment sent by a core network device, the base station calculates a paging location of the user equipment, and according to the determined location of the user equipment.
  • the coverage level sends an air interface paging message to the user equipment, and sends paging scheduling information on the paging location; after receiving the paging scheduling information sent by the base station, the user equipment parses the paging scheduling message to obtain the paging message.
  • the response message is returned; if the parsing fails, the current coverage level of the user equipment is reported, so that the base station resends the paging message to the user equipment according to the current coverage level, or does not report the current coverage level, so that the base station re-determines according to the current coverage level.
  • the coverage level retransmits the paging message to the user equipment; the base station in the M2M communication system sends a paging message to the user equipment according to the coverage level of the user equipment, so that the user equipments in different coverage areas can be correctly received to a certain extent.
  • Paging messages while reducing the number of retransmissions of paging messages; avoiding existing bases
  • the user does not consider the location of the user equipment sending a paging message when the strength of the cover device, leading to the location of the user equipment is poor strength of the cover, the user equipment receives the paging message not a problem.

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Abstract

本发明公开了一种寻呼方法、设备及系统，涉及无线通信技术领域，根据用户设备的覆盖等级向用户设备发送消息，使处于不同覆盖区域的用户设备获取到寻呼消息，同时降低重发寻呼消息的次数。本发明提供的方法包括：基站接收机器对机器用户设备的寻呼消息；计算所述用户设备的寻呼位置；确定所述用户设备的覆盖等级；根据所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息，以及在所述寻呼位置上发送寻呼调度信息；其中，所述寻呼调度信息用于指示所述空口寻呼消息的发送位置，所述空口寻呼消息包含所述用户设备的寻呼消息。

Description

一种寻呼方法、设备及系统 技术领域
本发明涉及无线通信技术领域，尤其涉及一种寻呼方法、设备及系统。
背景技术
机器对机器(英文：Machine to Machine，缩写：M2M)通信是一种包括无需人交互的一个或多个机器设备的数据通信，其中，M2M通信中使用的机器设备(如传感器、电表、水表、报警设备)可称为用户设备。由于M2M通信系统中用户设备数量巨大且多由电池供电，对M2M系统而言更换一次电池会是一个极大的工作量，鉴于此，人们希望用户设备具有较低的功率消耗，较长的待机时间。为满足用户设备的这一特性，在M2M通信系统的空闲模式下，基站周期性地向用户设备发送寻呼消息，以使用户设备仅在特定间隔按照基站发送的寻呼消息唤醒并发送和接收数据，而在其他时间段处于休眠状态，即关闭自身的通信接口，以便减少用户设备的电池电力。
图1示出了现有M2M通信系统中寻呼消息调度周期的帧格式，如图1所示，一个寻呼周期(英文：Paging Cycle，缩写：PC)，包含若干个寻呼帧(英文：Paging Frame)，每个寻呼帧包含若干个寻呼机会(英文：Paging Occasion，缩写：PO)，其中，PF为一个无线帧，PO为一个无线子帧，在PO时刻向用户设备发送寻呼调度信息，其中，所述寻呼调度信息为下行控制信息(英文：Downlink Control Information，缩写：DCI)，用于指示寻呼消息的所处的位置，用户设备在PO时刻接收到寻呼调度消息后，解析出寻呼消息的位置获取寻呼消息，成功唤醒用户设备。
然而，在实际应用中，基站向用户设备发送寻呼消息时仅采用现有蜂窝系统的传输机制，并未考虑用户设备所处位置的覆盖强度， 此处，若用户设备部署的位置位于角落、或者地下室等覆盖区域很差的地方，则会使得用户设备接收不到寻呼消息。
发明内容
本发明的实施例提供一种寻呼方法、设备及系统，以解决现有用户设备所处位置覆盖强度很差时，用户设备接收不到寻呼消息的问题。
为达到上述目的，本发明的实施例采用如下技术方案：
第一方面，本发明实施例提供一种寻呼方法，所述方法包括：
基站接收用户设备的寻呼消息；其中，所述寻呼消息包含有所述用户设备的用户标识；
根据所述用户设备的用户标识，计算所述用户设备的寻呼位置，以及确定所述用户设备的覆盖等级；
根据所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息，以及在所述寻呼位置上发送寻呼调度信息；其中，所述寻呼调度信息用于指示所述空口寻呼消息的发送位置，所述空口寻呼消息包含所述用户设备的寻呼消息。
在第一方面的第一种可能实现的方式中，结合第一方面，所述确定所述用户设备的覆盖等级包括：
若所述寻呼消息未携带有所述用户设备的覆盖等级且所述基站也未存贮所述用户设备与覆盖等级的对应关系，则确定所述用户设备的覆盖等级为最差覆盖等级。
在第一方面的第二种可能实现的方式中，结合第一方面或第一方面的第一种可能实现的方式，所述根据所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息包括：
将与所述用户设备的寻呼位置和覆盖等级相同的寻呼消息合并在同一个寻呼记录列表内；
将所述寻呼记录列表包含在与所述用户设备对应的空口寻呼消息里；
根据预设的覆盖等级与调制编码格式MCS的对应关系，采用与 所述用户设备的覆盖等级对应的MCS对所述空口寻呼消息进行调制编码向所述用户设备发送。
在第一方面的第三种可能实现的方式中，结合第一方面至第一方面的第二种可能实现的方式中的任一种实现方式，所述基站接收用户设备的寻呼消息包括：
所述基站接收移动性管理实体MME或者服务通用分组无线服务技术支持节点SGSN发送的所述用户设备的寻呼消息。
在第一方面的第四种可能实现的方式中，结合第一方面的第三种可能实现的方式，所述计算所述用户设备的寻呼位置包括：
根据网络配置的寻呼周期、寻呼超帧密度以及用户设备的设备标识计算所述寻呼位置所处的寻呼超帧；
根据一个寻呼超帧内寻呼机会的个数、用户设备的设备标识以及寻呼超帧密度计算所述寻呼位置所处的寻呼机会；
其中，寻呼超帧内寻呼机会的个数根据寻呼超帧的长度和下行控制信息间隔确定。
在第一方面的第五种可能实现的方式中，结合第一方面至第一方面的第四种可能实现的方式中的任一种实现方式，所述方法还包括：
若基站接收到用于指示重新发送所述用户设备的寻呼消息的重发指示信息，则重新确定所述用户设备的覆盖等级；
根据重新确定的所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息。
在第一方面的第六种可能实现的方式中，结合第一方面的第五种可能实现的方式，所述重新确定所述用户设备的覆盖等级包括：
若所述基站接收到的重发指示消息中包含用户设备的当前覆盖等级，则确定所述用户设备的覆盖等级为当前覆盖等级；
或者，若所述基站接收到的所述重发指示消息中未包含所述用户设备的当前覆盖等级，则降低所述用户设备的覆盖等级到次一级的覆盖等级，或者确定所述用户设备的覆盖等级为最差覆盖等级。
第二方面，本发明实施例提供一种寻呼方法，包括：
用户设备在寻呼位置接收基站发送寻呼调度信息；其中，所述寻呼调度消息根据所述用户设备的覆盖等级对应的调制编码格式MCS进行编码，用于指示基站向所述用户设备发送的空口寻呼消息所处的位置，所述用户设备的覆盖等级由所述用户设备上报给MME/SGSN，并由所述MME/SGSN下发给所述基站；
所述用户设备根据所述用户设备的当前覆盖等级所对应的MCS对所述寻呼调度信息进行解码。
在第二方面的第一种可能实现的方式中，结合第二方面，所述方法还包括：
若所述用户设备成功解析出所述寻呼调度信息，则按照所述寻呼调度信息指示的位置接收所述基站发送的空口寻呼消息，从所述空口寻呼消息中获取所述用户设备的寻呼消息；
或者，若所述用户设备解析所述寻呼调度信息失败，则通过所述基站向所述MME/SGSN上报所述用户设备的当前覆盖等级。
在第二方面的第二种可能实现的方式中，结合第二方面的第一种可能实现的方式，所述通过所述基站向所述MME/SGSN上报所述用户设备的当前覆盖等级包括：
所述用户设备向所述基站上报携带有用户设备的当前覆盖等级的随机接入消息，指示所述基站向MME或者SGSN上报所述用户设备的当前覆盖等级；
或者，所述用户设备向所述基站上报携带有用户设备的当前覆盖的注册Attach消息或者跟踪区更新TAU消息或者路由区更新RAU消息，指示所述基站向MME或者SGSN转发所述Attach消息或者所述TAU消息或者所述RAU消息。
第三方面，本发明实施例提供一种基站，包括：
接收单元，用于接收用户设备的寻呼消息；其中，所述寻呼消息包含所述用户设备的用户标识；
计算单元，用于根据所述接收单元接收到的用户标识，计算所 述用户设备的寻呼位置；
确定单元，用于根据所述接收单元接收到的用户标识，确定所述用户设备的覆盖等级；
发送单元，用于根据所述确定单元确定的所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息，以及在所述计算单元计算的寻呼位置上发送寻呼调度信息；其中，所述寻呼调度信息用于指示所述空口寻呼消息的发送位置，所述空口寻呼消息包含所述用户设备的寻呼消息。
在第三方面的第一种可能实现的方式中，结合第三方面，所述确定单元具体用于：
若所述寻呼消息未携带有所述用户设备的覆盖等级且所述基站也未存贮所述用户设备与覆盖等级的对应关系，则确定所述用户设备的覆盖等级为最差覆盖等级。
在第三方面的第二种可能实现的方式中，结合第三方面或第三方面的第一种可能实现的方式，所述发送单元具体用于：
将与所述用户设备的寻呼位置和覆盖等级相同的寻呼消息合并在同一个寻呼记录列表内；
将所述寻呼记录列表包含在与所述用户设备对应的空口寻呼消息里；
根据预设的覆盖等级与调制编码格式MCS的对应关系，采用与所述用户设备的覆盖等级对应的MCS对所述空口寻呼消息进行调制编码向所述用户设备发送。
在第三方面的第三种可能实现的方式中，结合第三方面至第三方面的第二种可能实现的方式中的任一种实现方式，所述接收单元具体用于：
接收MME或者SGSN发送的所述用户设备的寻呼消息。
在第三方面的第四种可能实现的方式中，结合第三方面的第三种可能实现的方式，所述计算单元具体用于：
根据网络配置的寻呼周期、寻呼超帧密度以及用户设备的设备 标识计算所述寻呼位置所处的寻呼超帧；
根据一个寻呼超帧内寻呼机会的个数、用户设备的设备标识以及寻呼超帧密度计算所述寻呼位置所处的寻呼机会；
其中，寻呼超帧内寻呼机会的个数根据寻呼超帧的长度和下行控制信息间隔确定。
在第三方面的第五种可能实现的方式中，结合第三方面至第三方面的第四种可能实现的方式中的任一种实现方式，所述确定单元，还用于若所述接收单元接收到用于指示重新发送所述用户设备的寻呼消息的重发指示信息，则重新确定所述用户设备的覆盖等级；
所述发送单元，还用于根据所述确定单元重新确定的所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息。
在第三方面的第六种可能实现的方式中，结合第三方面的第五种可能实现的方式，所述确定单元具体用于：
若所述基站接收到的重发指示消息中包含用户设备的当前覆盖等级，则确定所述用户设备的覆盖等级为当前覆盖等级；
或者，若所述基站接收到的所述重发指示消息中未包含所述用户设备的当前覆盖等级，则降低所述用户设备的覆盖等级到次一级的覆盖等级，或者确定所述用户设备的覆盖等级为最差覆盖等级。
第四方面，本发明实施例提供一种用户设备，包括：
接收单元，用于在寻呼位置接收基站发送寻呼调度信息；其中，所述寻呼调度消息根据所述用户设备的覆盖等级对应的调制编码格式MCS进行编码，用于指示基站向所述用户设备发送的空口寻呼消息所处的位置，所述用户设备的覆盖等级由所述用户设备上报给MME/SGSN，并由所述MME/SGSN下发给所述基站；
解析单元，用于根据所述用户设备的当前覆盖等级所对应的MCS对所述寻呼调度信息进行解码。
在第四方面的第一种可能实现的方式中，结合第四方面，若所述用户设备成功解析出所述寻呼调度信息，所述用户设备还包括：
获取单元，用于若所述解析单元成功解析出所述寻呼调度信息， 按照所述接收单元接收的寻呼调度信息指示的位置接收所述基站发送的空口寻呼消息，从所述空口寻呼消息中获取所述用户设备的寻呼消息；
上报单元，用于若所述解析单元解析所述寻呼调度信息失败，向所述基站上报所述用户设备的当前覆盖等级。
在第四方面的第二种可能实现的方式中，结合第四方面的第一种可能实现的方式，所述上报单元具体用于：
向所述基站上报携带有用户设备的当前覆盖等级的随机接入消息，指示所述基站向MME或者SGSN上报所述用户设备的当前覆盖等级；
或者，向所述基站上报携带有用户设备的当前覆盖的注册Attach消息或者跟踪区更新TAU消息或者路由区更新RAU消息，指示所述基站向MME或者SGSN转发所述Attach消息或者所述TAU消息或者所述RAU消息。
第五方面，本发明实施例提供一种寻呼系统，包括：如第三方面至第三方面的第六种可能的实现方式中的任一种实现所述的基站、如第四方面至第四方面的第二种可能的实现方式中的任一种实现所述的用户设备、以及核心网设备；
其中，所述核心网设备为MME或者SGSN。
第六方面，本发明实施例提供一种基站，包括：
通信单元，用于接收机器对机器用户设备的寻呼消息；其中，所述寻呼消息包含所述用户设备的用户标识；
处理器，用于根据所述通信单元接收到用户标识，计算所述用户设备的寻呼位置，以及确定所述用户设备的覆盖等级；
所述通信单元，还用于根据所述处理器确定的所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息，以及在所述处理器计算的寻呼位置上发送寻呼调度信息；其中，所述寻呼调度信息用于指示所述空口寻呼消息的发送位置，所述空口寻呼消息包含所述用户设备的寻呼消息。
在第六方面的第一种可能实现的方式中，结合第六方面，所述处理器具体用于：
若所述寻呼消息未携带有所述用户设备的覆盖等级且所述基站也未存贮所述用户设备与覆盖等级的对应关系，则确定所述用户设备的覆盖等级为最差覆盖等级。
在第六方面的第二种可能实现的方式中，结合第六方面或第六方面的第一种可能实现的方式，所述通信单元具体用于：
将与所述用户设备的寻呼位置和覆盖等级相同的寻呼消息合并在同一个寻呼记录列表内；
将所述寻呼记录列表包含在与所述用户设备对应的空口寻呼消息里；
根据预设的覆盖等级与调制编码格式MCS的对应关系，采用与所述用户设备的覆盖等级对应的MCS对所述空口寻呼消息进行调制编码向所述用户设备发送。
在第六方面的第三种可能实现的方式中，结合第六方面至第六方面的第二种可能实现的方式中的任一种实现方式，所述通信单元具体用于：
接收MME或者SGSN发送的所述用户设备的寻呼消息。
在第六方面的第四种可能实现的方式中，结合第六方面的第三种可能实现的方式，所述处理器具体用于：
根据网络配置的寻呼周期、寻呼超帧密度以及用户设备的设备标识计算所述寻呼位置所处的寻呼超帧；
根据一个寻呼超帧内寻呼机会的个数、用户设备的设备标识以及寻呼超帧密度计算所述寻呼位置所处的寻呼机会；
其中，寻呼超帧内寻呼机会的个数根据寻呼超帧的长度和下行控制信息间隔确定。
在第六方面的第五种可能实现的方式中，结合第六方面至第六方面的第四种可能实现的方式中的任一种实现方式，
所述处理器，还用于若所述通信单元接收到用于指示重新发送 所述用户设备的寻呼消息的重发指示信息，则重新确定所述用户设备的覆盖等级；
所述通信单元，还用于根据所述处理器重新确定的所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息。
在第六方面的第六种可能实现的方式中，结合第六方面的第五种可能实现的方式，所述处理器具体用于：
若所述基站接收到的重发指示消息中包含用户设备的当前覆盖等级，则确定所述用户设备的覆盖等级为当前覆盖等级；
或者，若所述基站接收到的所述重发指示消息中未包含所述用户设备的当前覆盖等级，则降低所述用户设备的覆盖等级到次一级的覆盖等级，或者确定所述用户设备的覆盖等级为最差覆盖等级。
第七方面，本发明实施例提供一种用户设备，包括：
通信单元，用于在寻呼位置接收基站发送寻呼调度信息；其中，所述寻呼调度消息根据所述用户设备的覆盖等级对应的调制编码格式MCS进行编码，用于指示基站向所述用户设备发送的空口寻呼消息所处的位置，所述用户设备的覆盖等级由所述用户设备上报给MME/SGSN，并由所述MME/SGSN下发给所述基站；
处理器，用于根据所述用户设备的当前覆盖等级所对应的MCS对所述通信单元接收到的寻呼调度信息进行解码。
在第七方面的第一种可能实现的方式中，结合第七方面，所述处理器，还用于若所述处理器成功解析出所述寻呼调度信息，按照所述寻呼调度信息指示的位置接收所述基站发送的空口寻呼消息，从所述空口寻呼消息中获取所述用户设备的寻呼消息；
所述通信单元，还用于若所述处理器解析所述寻呼调度信息失败，向所述基站上报所述用户设备的当前覆盖等级。
在第七方面的第二种可能实现的方式中，结合第七方面的第一种可能实现的方式，所述通信单元具体用于：
向所述基站上报携带有用户设备的当前覆盖等级的随机接入消息，指示所述基站向MME或者SGSN上报所述随机接入消息，以使 得所述MME或者所述SGSN向所述基站发送用于指示重新发送所述用户设备的寻呼消息的重发指示信息。
第八方面，本发明实施例提供一种寻呼系统，包括：如第六方面至第六方面的第六种可能的实现方式中的任一种实现所述的基站、如第七方面至第七方面的第二种可能的实现方式中的任一种实现所述的用户设备、以及核心网设备；
其中，所述核心网设备为MME或者SGSN。
由上可知，本发明实施例提供一种寻呼方法、设备及系统，当基站接收到用户设备的寻呼消息时，计算所述用户设备的寻呼位置，获取所述用户设备的覆盖等级；根据所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息，以及在所述寻呼位置上发送寻呼调度信息；其中，所述寻呼调度信息用于指示所述空口寻呼消息的发送位置，所述空口寻呼消息包含所述用户设备的寻呼消息，与现有技术相比，实现了M2M通信系统中基站根据用户设备的覆盖等级向用户设备发送寻呼消息，不仅使处于不同覆盖区域的用户设备在一定程度上能够正确接收到寻呼消息，同时减少了重发寻呼消息的次数。避免了现有基站向用户设备发送寻呼消息时未考虑用户设备所处位置的覆盖强度，而导致用户设备所处位置覆盖强度很差时，用户设备接收不到寻呼消息的问题。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为现有M2M通信系统中寻呼消息调度周期的帧格式；
图2为本发明一实施例提供的寻呼方法的应用场景；
图3为本发明另一实施例提供的寻呼方法的流程图；
图4为本发明实施例提供的寻呼消息调度周期的帧格式；
图5为本发明又一实施例提供的寻呼方法的流程图；
图6为本发明另一实施例提供的寻呼方法的流程图；
图7为本发明一实施例提供的基站的结构图；
图8为本发明一实施例提供的用户设备的结构图；
图8A为本发明一实施例提供的用户设备的结构图；
图8B为本发明一实施例提供的用户设备的结构图；
图9为本发明一实施例提供的寻呼系统的结构图；
图10为本发明另一实施例提供的基站的结构图；
图11为本发明另一实施例提供的用户设备的结构图；
图12为本发明另一实施例提供的寻呼系统的结构图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例提供的寻呼方法，不仅适用于长期演进(英文：Long Term Evolution，缩写：LTE)网络系统，还适应下述任一网络系统：增强型长期演进(英文：Advanced Long Term Evolution，缩写：LTE-A)、通用移动通信系统(英文：Universal Mobile Telecommunications System，缩写：UMTS)和全球移动通信(英文：Global System for Mobile Communication，缩写：GSM)系统等，而对于该寻呼方法具体适用于哪个通信系统，本发明实施例对比不进行限定，本发明实施例仅以该寻呼方法适用于LTE系统为例进行说明。图2示出了本发明实施例提供的寻呼方法的应用场景，该场景可以包括：多个用户设备、基站以及核心网设备；移动性管理实体(英文：Moblity Management Entity，缩写：MME)；其中，用户设备又可以称之为机器类型通信(英文：Machine Type Communication，缩写：MTC)，可以为未伴有人交互的设备中的任一种设备，通过基 站进行信息交互，且用户设备可以处于覆盖等级比较强的位置，如现有蜂窝网络的强覆盖区域，也可以处于覆盖等级很差的位置，如现有蜂窝网络的弱覆盖区域(角落、地下室等地)；核心网设备可以为与基站通过S1接口连接的移动性管理实体(英文：Moblity Management Entity，缩写：MME)；也可以为与基站通过Gb接口连接的服务GPRS(英文：General Packet Radio Service，中文：通用分组无线服务技术)支持节点(英文：Serving GPRS Support Node，缩写：SGSN)；对于处于覆盖等级很强的用户设备，不需要加大寻呼消息的传输增益就可以使得用户设备正确地接收到寻呼消息，而对于处于覆盖等级很差的用户设备，则需要对寻呼消息进行增大传输增益的相应处理(如增大传输码率、改变编码方式、扩频)才能使得用户设备接收正确地到寻呼消息，即需要根据用户设备的覆盖等级对发送给用户设备的寻呼消息进行不同的处理，才能使用户设备正确地接收到寻呼消息。鉴于此，本发明实施例中，当核心网设备需要寻呼一用户设备，将寻呼消息发送给基站后，基站根据用户设备的当前的覆盖等级在特定时刻将寻呼消息进行处理后发送给用户设备，以使得用户设备能够很好的接收到寻呼消息，下面对本发明实施例提供的寻呼方法进行介绍。
实施例一
如图3示出了本发明实施例一提供的寻呼方法的流程图，如图3所示，所述方法可以包括：
301、基站接收用户设备的寻呼消息。
优选的，基站可以通过S1接收MME发送的用户设备的寻呼消息；或者通过Gb接口接收SGSN发送的用户设备的寻呼消息。
其中，寻呼消息包含有所述用户设备的用户标识，用于唤醒空闲状态下的用户设备。
302、基站根据所述用户设备的用户标识，计算所述用户设备的寻呼位置。
其中，寻呼位置用于发送寻呼调度信息；寻呼调度信息用于指 示基站向用户设备发送空口寻呼消息的发送位置。需要说明的是，本发明实施例中寻呼消息调度周期的帧格式与图1是不同的，如图4所示，本发明实时中，每个寻呼周期包含若干个寻呼超帧(Paging Super Frame)，每个寻呼超帧包含若干个寻呼机会(Paging Occasion)，其中，寻呼机会为一个无线帧，相当于图1中的寻呼帧，寻呼机会即为寻呼位置，用于承载下行控制信息(Downlink Control Information，DCI)，如寻呼调度信息，每个下行控制信息占用一个无线子帧，相当于占用图1中的一个寻呼机会。
优选的，基站可以根据网络配置的寻呼周期、寻呼超帧密度以及用户设备的设备标识计算所述寻呼位置所处的寻呼超帧；如根据公式：SFN mod T＝(T div N)*(UE_ID mod N)确定寻呼消息所处的寻呼超帧；
根据一个寻呼超帧内寻呼机会的个数、用户设备的设备标识以及寻呼超帧密度计算所述寻呼位置所处的寻呼机会；如根据公式：PO＝floor(UE_ID/N)mod Ns确定寻呼消息所处的寻呼机会。
其中，上述公式中的符号：“mod”表示对两个整数相除取余；“div”表示：对两个整数相除；“*”表示对两个整数相乘；“floor”表示向下取整；“/”表示对两个相除。
上述公式中的参数：UE_ID表示用户设备的设备标识，用于识别用户设备，可以为下述任一种识别码：国际移动用户识别码(英文：International Mobile Subscriber Identification Number，缩写：IMSI)、临时识别码(英文：Temporary Mobile Subscriber Identity，缩写：TMSI)、全球唯一临时UE标识Globally Unique Temporary UE Identity、移动设备国际身份码(英文：International Mobile Equipment Identity，缩写：IMEI)。
T表示寻呼周期。
Ns表示一个下行控制信息间隔(DCI interval)中寻呼机会(PO)的个数，取值为Ns＝ceil(the length of a super frame/the length of DCI interval)，即寻呼机会的个数等于寻呼超帧的长度与下行控制信 息间隔的除数向上取整后的整数值；比如：在当前M2M通信系统中，超帧的长度为64个无线帧(radio frame)，此时，若DCI interval为64个radio frame，则Ns最多为1；若DCI interval为32个radio frame，Ns最多为2；若DCI interval为1个radio frame，则Ns最多为64个。
N表示一个寻呼周期中寻呼超帧的密度；比如：N＝T/4表示一个寻呼周期T内每4个超帧才可能有一次寻呼超帧；N＝T/2表示一个寻呼周期T内每偶数个超帧才有一次寻呼超帧；N＝T表示一个寻呼周期T内每个超帧都可能是寻呼超帧。
303、基站确定所述用户设备的覆盖等级。
其中，所述覆盖等级用于表示用户设备所处位置的网络覆盖强度，可以根据系统规定划分为不同的等级；通常情况下，窄带系统中设计3个覆盖等级，分别为：0级、1级、2级，覆盖等级越高表示网络覆盖强度越小，越需要采用能够增强网络覆盖强度的编码调制方式。所述覆盖等级可以包含在所述寻呼消息中，或者，预先存储在所述基站中。
此外，若所述覆盖等级未包含在所述寻呼消息中，或者，未预先存储在所述基站中，则基站确定所述用户设备的覆盖等级为最差覆盖等级。
304、基站根据所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息，以及在所述寻呼位置上发送寻呼调度信息；其中，所述寻呼调度信息用于指示所述空口寻呼消息的发送位置，所述空口寻呼消息包含所述用户设备的寻呼消息。
其中，空口寻呼消息为在同一个空口上的发射的一个或多个M2M的寻呼消息，
优选的，基站可以将与所述用户设备的寻呼位置和覆盖等级相同的寻呼消息合并在同一个寻呼记录列表内；
将所述寻呼记录列表包含在与所述用户设备对应的空口寻呼消息里；
根据预设的覆盖等级与调制编码格式MCS的对应关系，采用与所述用户设备的覆盖等级对应的MCS对所述空口寻呼消息进行调制编码向所述用户设备发送。
其中，所述寻呼记录列表包含：寻呼消息、以及寻呼消息与用户设备的对应关系。
覆盖等级与调制编码格式MCS的对应关系是M2M通信过程中根据需要进行设置的，本发明实施例对比不进行限定。
例如，若用户设备1的寻呼位置中寻呼超帧为第1个超帧、寻呼机会为第6个无线帧，且用户设备1的覆盖等级为1，用户设备2的寻呼位置中寻呼超帧为第1个超帧、寻呼机会为第6个无线帧，且用户设备2的覆盖等级为1，用户设备3的寻呼位置中寻呼超帧为第1个超帧、寻呼机会为第6个无线帧，且用户设备3的覆盖等级为1，则可以将用户设备1、用户设备2和用户设备3的寻呼消息合并在同一个寻呼记录列表，并将该寻呼记录列表通过一个空口发射出去。
表1
寻呼消息 设备标识
寻呼消息1 用户设备1
寻呼消息2 用户设备2
寻呼消息3 用户设备3
显然，在步骤304中，基站可以采用默认的编码调制方式(如最差覆盖等级对应的编码调制方式)发送寻呼消息；可以根据MME/SGSN发送的用户设备的覆盖等级，采用相应的编码调制方式传输寻呼消息；还可以根据基站内部存储的用户设备的覆盖等级，采用相应的编码调制方式传输寻呼消息集；实现了根据用户设备的覆盖等级向用户设备发送寻呼消息，在一定程度上使处于不同覆盖等级的用户设备获取到自身对应的寻呼消息，并向MME/SGSN返回一个指示寻呼成功的响应消息。但是，由于用户设备会有一定的移动且用户设备所处的通信环境具有变化性，基站本次确定的用户设备的覆盖等级并不能准确代表用户设备的当前覆盖等级，若根据 该覆盖等级对应的MCS进行编码调制发送寻呼消息，则会使得用户设备因解析不出寻呼调度信息而获取不到寻呼消息，进而引起重发寻呼消息，因此，为了减少重发用户设备的寻呼消息的次数，进一步的，所述方法还包括：
若基站接收到用于指示重新发送所述用户设备的寻呼消息的重发指示信息，则重新确定所述用户设备的覆盖等级；
根据重新确定的所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息。
示例性的，所述重新确定所述用户设备的覆盖等级可以包括：
若所述基站接收到的重发指示消息中包含用户设备的当前覆盖等级，则确定所述用户设备的覆盖等级为当前覆盖等级；
若所述基站接收到的所述重发指示消息中未包含所述用户设备的当前覆盖等级，则降低所述用户设备的覆盖等级到次一级的覆盖等级，或者确定所述用户设备的覆盖等级为最差覆盖等级。
由上可知，本发明实施例提供一种寻呼方法，当基站接收到用户设备的寻呼消息时，计算所述用户设备的寻呼位置，确定所述用户设备的覆盖等级；根据所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息，以及在所述寻呼位置上发送寻呼调度信息；其中，所述寻呼调度信息用于指示所述空口寻呼消息的发送位置，所述空口寻呼消息包含所述用户设备的寻呼消息，实现了M2M通信系统中基站根据用户设备的覆盖等级向用户设备发送寻呼消息，不仅使处于不同覆盖区域的用户设备在一定程度上能够正确接收到寻呼消息，同时减少了重发寻呼消息的次数；避免了现有基站向用户设备发送寻呼消息时未考虑用户设备所处位置的覆盖强度，而导致用户设备所处位置覆盖强度很差时，用户设备接收不到寻呼消息的问题。
实施例二
图5示出了本发明实施例二提供的寻呼方法的流程图，如图5所示，所述方法可以包括：
501、用户设备在寻呼位置接收基站发送寻呼调度信息。
其中，所述寻呼调度消息根据所述用户设备的覆盖等级对应的调制编码格式MCS进行编码，用于指示基站向所述用户设备发送的空口寻呼消息所处的位置，所述用户设备的覆盖等级由所述用户设备上报给MME/SGSN，并由所述MME/SGSN下发给所述基站；
所述空口寻呼消息包含一寻呼消息记录列表，寻呼消息记录列表包含至少一个用户设备的寻呼消息，以及用户设备的寻呼消息与用户设备的对应关系；其中，寻呼消息列表中各用户设备的寻呼消息的寻呼位置和覆盖等级与所述用户设备的寻呼位置和覆盖等级相同。
需要说明的是，用户设备计算寻呼位置的方法与基站计算寻呼位置的方法相同，在此不再赘述。
502、用户设备根据所述用户设备的当前覆盖等级所对应的MCS对所述寻呼调度信息进行解码。
其中，用户设备可以根据参考信号接收功率(英文：Reference Signal Receiving Power，缩写：RSRP)确定自身的当前覆盖等级。
进一步的，若所述用户设备成功解析出所述寻呼调度信息，则表示基站发送寻呼调度信息时采用的覆盖等级与用户设备当前的覆盖等级相同或者低于用户设备的当前覆盖等级，所述方法还包括：
用户设备按照所述寻呼调度信息指示的位置接收所述基站发送的空口寻呼消息，从所述空口寻呼消息中获取所述用户设备的寻呼消息。
若所述用户设备解析所述寻呼调度信息失败，则表示基站发送寻呼调度信息时采用的覆盖等级高于用户设备当前的覆盖等级，用户设备需要向所述MME/SGSN上报所述用户设备的当前覆盖等级。
示例性的，用户设备向向所述MME/SGSN上报所述用户设备的当前覆盖等级可以包括：
用户设备向所述基站上报携带有用户设备的当前覆盖等级的随机接入消息，指示所述基站向MME或者SGSN上报所述用户设备的 当前覆盖等级；
或者，用户设备向所述基站上报携带有用户设备的当前覆盖的注册Attach消息或者跟踪区更新(Tracking Area Update，TAU)消息或者路由区更新(Route Area Update，RAU)消息，指示所述基站向MME或者SGSN转发所述Attach消息或者所述TAU消息或者所述RAU消息。
由上可知，本发明实施例提供一种寻呼方法，当用户设备接收基站发送的寻呼调度信息后，若成功解析出所述寻呼调度信息，则按照所述寻呼调度信息指示的位置接收所述基站发送的空口寻呼消息，从所述空口寻呼消息中获取所述用户设备的寻呼消息；若解析所述寻呼调度信息失败，则向所述基站上报所述用户设备的当前覆盖等级，以使得基站在向用户设备重发寻呼消息时，根据用户设备的当前覆盖等级向用户设备重发消息，实现了M2M通信系统中基站根据用户设备的覆盖等级向用户设备发送寻呼消息，不仅使处于不同覆盖区域的用户设备在一定程度上能够正确接收到寻呼消息，同时减少了重发寻呼消息的次数；避免了现有基站向用户设备发送寻呼消息时未考虑用户设备所处位置的覆盖强度，而导致用户设备所处位置覆盖强度很差时，用户设备接收不到寻呼消息的问题。
下面以图2所示的应用场景为例，通过实施例三对本发明提供的寻呼方法进行详细介绍。
实施例三
图6为本发明实施例提供的寻呼方法的流程图，如图6所示，所述方法可以包括：
601、核心网设备向基站发送用户设备的寻呼消息。
优选的，核心网设备通过S1接口或者Gb接口向基站发送用户设备的寻呼消息。
其中，寻呼消息用于唤醒空闲状态下的用户设备。
602、基站计算所述用户设备的寻呼位置。
其中，寻呼位置由寻呼超帧和寻呼机会确定，用于发送寻呼调 度信息；寻呼调度信息用于指示基站向用户设备发送空口寻呼消息的发送位置。
优选的，基站可以根据网络配置的寻呼周期、寻呼超帧密度以及用户设备的设备标识计算所述寻呼超帧；如根据公式：SFN mod T＝(T div N)*(UE_ID mod N)确定寻呼位置所处的寻呼超帧；
根据一个寻呼超帧内寻呼机会的个数、用户设备的设备标识以及寻呼超帧密度计算所述寻呼机会；如根据公式：PO＝floor(UE_ID/N)mod Ns确定寻呼位置所处的寻呼机会。
603、基站确定所述用户设备的覆盖等级。
其中，所述覆盖等级用于表示用户设备所处位置的网络覆盖强度，可以根据系统规定划分为不同的等级；通常情况下，窄带系统中设计3个覆盖等级，分别为：0级、1级、2级，覆盖等级越高表示网络覆盖强度越小，越需要采用能够增强网络覆盖强度的编码调制方式。所述覆盖等级可以包含在所述寻呼消息中，或者，预先存储在所述基站中。
此外，若所述覆盖等级未包含在所述寻呼消息中，或者，未预先存储在所述基站中，则基站确定所述用户设备的覆盖等级为最差覆盖等级。
604、基站根据所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息，以及在所述寻呼位置上发送寻呼调度信息。
其中，所述寻呼调度信息用于指示所述空口寻呼消息的发送位置，所述空口寻呼消息包含所述用户设备的寻呼消息；空口寻呼消息为在同一个空口上的发射的一个或多个用户设备的寻呼消息。
优选的，基站可以将与所述用户设备的寻呼位置和覆盖等级相同的寻呼消息合并在同一个寻呼记录列表内；
将所述寻呼记录列表包含在与所述用户设备对应的空口寻呼消息里；
根据预设的覆盖等级与调制编码格式MCS的对应关系，采用与所述用户设备的覆盖等级对应的MCS对所述空口寻呼消息进行调 制编码向所述用户设备发送。
其中，所述寻呼记录列表包含：寻呼消息、以及寻呼消息与用户设备的对应关系。
605、用户设备在寻呼位置接收基站发送的寻呼调度信息。
需要说明的是，用户设备计算寻呼位置的方法与基站计算寻呼位置的方法相同。
606、用户设备解析寻呼调度消息，若所述用户设备成功解析出所述寻呼调度信息，则执行步骤607-608；若所述用户设备解析所述寻呼调度信息失败，则执行步骤609-610。
优选的，用户设备可以采用用户设备自身确定的覆盖等级对应的调制编码方式解析所述寻呼调度消息。其中，用户设备可以根据参考信号接收功率(英文：Reference Signal Receiving Power，缩写：RSRP)确定自身的覆盖等级。
607、用户设备按照所述寻呼调度信息指示的位置接收所述基站发送的空口寻呼消息，从所述空口寻呼消息中获取所述用户设备的寻呼消息。
608、用户设备通过基站向核心网设备返回用于指示寻呼成功的响应消息。
609、用户设备向所述基站上报携带有用户设备的当前覆盖等级的随机接入消息。
610、基站通过第一S1或者Gb接口向核心网设备上报携带有用户设备的当前覆盖等级的随机接入消息。
611、当核心网设备在预设时间内没有收到任何响应消息时，则通过第二S1或者Gb接口向基站重发指示信息，其中，所述重发指示信息用于指示重新发送所述用户设备的寻呼消息的重发指示信息，若所述重发指示消息中包含用户设备的当前覆盖等级，则执行步骤612；若所述重发指示消息中未包含用户设备的当前覆盖顶级，则执行步骤613。
612、基站根据第二S1或者Gb接口获得的用户设备的覆盖等 级向用户设备重发寻呼消息。
613、基站重新确定用户设备的覆盖等级为次一级的覆盖等级，或者最差覆盖等级。
614、基站根据重新确定的用户设备的覆盖等级向用户设备发送寻呼消息。
由上可知，本发明实施例提供一种寻呼方法。基站接收核心网设备发送的用户设备的寻呼消息后，计算所述用户设备的寻呼位置，并根据确定到的所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息，以及在所述寻呼位置上发送寻呼调度信息；用户设备接收到基站发送的寻呼调度信息后，解析寻呼调度消息，获取寻呼消息，若解析成功则返回响应消息；若解析失败，则上报用户设备的当前覆盖等级，使得基站根据该当前覆盖等级向用户设备重发寻呼消息，或者不上报当前覆盖等级，使得基站根据重新确定的覆盖等级向用户设备重发寻呼消息；实现了M2M通信系统中基站根据用户设备的覆盖等级向用户设备发送寻呼消息，不仅使处于不同覆盖区域的用户设备在一定程度上能够正确接收到寻呼消息，同时减少了重发寻呼消息的次数；避免了现有基站向用户设备发送寻呼消息时未考虑用户设备所处位置的覆盖强度，而导致用户设备所处位置覆盖强度很差时，用户设备接收不到寻呼消息的问题。
实施例四
图7示出了基站70的结构图，其中，所述基站70执行实施例一所述的寻呼方法，如图7所示，所述基站70可以包括：
接收单元701，用于接收用户设备的寻呼消息。
其中，寻呼消息包含所述用户设备的用户标识，用于唤醒空闲状态下的用户设备。
计算单元702，用于根据所述接收单元701接收的用户标识，计算所述用户设备的寻呼位置。
其中，寻呼位置用于发送寻呼调度信息；寻呼调度信息用于指示基站向用户设备发送空口寻呼消息的发送位置。需要说明的是， 本发明实施例中寻呼消息调度周期的帧格式与图1是不同的，如图4所示，本发明实时中，每个寻呼周期包含若干个寻呼超帧(Paging Super Frame)，每个寻呼超帧包含若干个寻呼机会(Paging Occasion)，其中，寻呼机会为一个无线帧，相当于图1中的寻呼帧，寻呼机会即为寻呼位置，用于承载下行控制信息(Downlink Control Information，DCI)，如寻呼调度信息，每个下行控制信息占用一个无线子帧，相当于占用图1中的一个寻呼机会。
确定单元703，用于根据所述接收单元701接收到的用户标识，确定所述用户设备的覆盖等级。
其中，所述覆盖等级用于表示用户设备所处位置的网络覆盖强度，可以根据系统规定划分为不同的等级；通常情况下，窄带系统中设计3个覆盖等级，分别为：0级、1级、2级，覆盖等级越高表示网络覆盖强度越小，越需要采用能够增强网络覆盖强度的编码调制方式。所述覆盖等级可以包含在所述寻呼消息中，或者，预先存储在所述基站中。
此外，若所述覆盖等级未包含在所述寻呼消息中，或者，未预先存储在所述基站中，则确定单元703确定所述用户设备的覆盖等级为最差覆盖等级。
发送单元704，用于根据所述确定单元703确定的所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息，以及在所述计算单元702计算出的寻呼位置上发送寻呼调度信息；其中，所述寻呼调度信息用于指示所述空口寻呼消息的发送位置，所述空口寻呼消息包含所述用户设备的寻呼消息。
其中，空口寻呼消息为在同一个空口上的发射的一个或多个M2M的寻呼消息，
进一步的，所述接收单元701具体用于：
通过S1接收MME发送的用户设备的寻呼消息；或者通过Gb接口接收SGSN发送的用户设备的寻呼消息。
进一步的，所述计算单元702具体用于：
根据网络配置的寻呼周期、寻呼超帧密度以及用户设备的设备标识计算所述寻呼超帧；如根据公式：SFN mod T＝(T div N)*(UE_ID mod N)确定所述寻呼位置所处的寻呼超帧；
根据一个寻呼超帧内寻呼机会的个数、用户设备的设备标识以及寻呼超帧密度计算所述寻呼机会；如根据公式：PO＝floor(UE_ID/N)mod Ns确定所述寻呼位置所处的寻呼机会。
其中，上述公式中的符号：“mod”表示对两个整数相除取余；“div”表示：对两个整数相除；“*”表示对两个整数相乘；“floor”表示向下取整；“/”表示对两个相除。
上述公式中的参数：UE_ID表示用户设备的设备标识，用于识别用户设备，可以为下述任一种识别码：国际移动用户识别码(英文：International Mobile Subscriber Identification Number，缩写：IMSI)、临时识别码(英文：Temporary Mobile Subscriber Identity，缩写：TMSI)、全球唯一临时UE标识Globally Unique Temporary UE Identity、移动设备国际身份码(英文：International Mobile Equipment Identity，缩写：IMEI)。
T表示寻呼周期。
Ns表示一个下行控制信息间隔(DCI interval)中寻呼机会(PO)的个数，取值为Ns＝ceil(the length of a super frame/the length of DCI interval)，即寻呼机会的个数等于寻呼超帧的长度与下行控制信息间隔的除数向上取整后的整数值；比如：在当前M2M通信系统中，超帧的长度为64个无线帧(radio frame)，此时，若DCI interval为64个radio frame，则Ns最多为1；若DCI interval为32个radio frame，Ns最多为2；若DCI interval为1个radio frame，则Ns最多为64个。
N表示一个寻呼周期中寻呼超帧的密度；比如：N＝T/4表示一个寻呼周期T内每4个超帧才可能有一次寻呼超帧；N＝T/2表示一个寻呼周期T内每偶数个超帧才有一次寻呼超帧；N＝T表示一个寻呼周期T内每个超帧都可能是寻呼超帧。
进一步的，所述发送单元704具体用于：
将与所述用户设备的寻呼位置和覆盖等级相同的寻呼消息合并在同一个寻呼记录列表内；
将所述寻呼记录列表包含在与所述用户设备对应的空口寻呼消息里；
根据预设的覆盖等级与调制编码格式MCS的对应关系，采用与所述用户设备的覆盖等级对应的MCS对所述空口寻呼消息进行调制编码向所述用户设备发送。
其中，所述寻呼记录列表包含：寻呼消息、以及寻呼消息与用户设备的对应关系。
覆盖等级与调制编码格式MCS的对应关系是M2M通信过程中根据需要进行设置的，本发明实施例对比不进行限定。
例如，若用户设备1的寻呼位置中寻呼超帧为第1个超帧、寻呼机会为第6个无线帧，且用户设备1的覆盖等级为1，用户设备2的寻呼位置中寻呼超帧为第1个超帧、寻呼机会为第6个无线帧，且用户设备2的覆盖等级为1，用户设备3的寻呼位置中寻呼超帧为第1个超帧、寻呼机会为第6个无线帧，且用户设备3的覆盖等级为1，则可以将用户设备1、用户设备2和用户设备3的寻呼消息合并在同一个寻呼记录列表，并将该寻呼记录列表通过一个空口发射出去。
显然，基站可以采用默认的编码调制方式(如最差覆盖等级对应的编码调制方式)发送寻呼消息；可以根据MME/SGSN发送的用户设备的覆盖等级，采用相应的编码调制方式传输寻呼消息；还可以根据基站内部存储的用户设备的覆盖等级，采用相应的编码调制方式传输寻呼消息集；实现了根据用户设备的覆盖等级向用户设备发送寻呼消息，在一定程度上使处于不同覆盖等级的用户设备确定到自身对应的寻呼消息，并向MME/SGSN返回一个指示寻呼成功的响应消息。但是，由于用户设备会有一定的移动且用户设备所处的通信环境具有变化性，基站本次确定的用户设备的覆盖等级并不能准确代表用户设备的当前覆盖等级，若根据该覆盖等级对应的 MCS进行编码调制发送寻呼消息，则会使得用户设备因解析不出寻呼调度信息而获取不到寻呼消息，进而引起重发寻呼消息。
因此，为了减少重发用户设备的寻呼消息的次数，进一步的，所述确定单元703，还用于若接收单元701接收到用于指示重新发送所述用户设备的寻呼消息的重发指示信息，则重新确定所述用户设备的覆盖等级；
所述发送单元704，还用于根据所述确定单元703重新确定的所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息。
进一步的，所述确定单元703具体用于：
若所述接收单元701接收到的重发指示消息中包含用户设备的当前覆盖等级，则确定所述用户设备的覆盖等级为当前覆盖等级；
或者，若所述接收单元701接收到的所述重发指示消息中未包含所述用户设备的当前覆盖等级，则降低所述用户设备的覆盖等级到次一级的覆盖等级，或者确定所述用户设备的覆盖等级为最差覆盖等级。
由上可知，本发明实施例提供一种基站，当基站接收到用户设备的寻呼消息时，计算所述用户设备的寻呼位置，确定所述用户设备的覆盖等级；根据所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息，以及在所述寻呼位置上发送寻呼调度信息；其中，所述寻呼调度信息用于指示所述空口寻呼消息的发送位置，所述空口寻呼消息包含所述用户设备的寻呼消息，实现了M2M通信系统中基站根据用户设备的覆盖等级向用户设备发送寻呼消息，不仅使处于不同覆盖区域的用户设备在一定程度上能够正确接收到寻呼消息，同时减少了重发寻呼消息的次数；避免了现有基站向用户设备发送寻呼消息时未考虑用户设备所处位置的覆盖强度，而导致用户设备所处位置覆盖强度很差时，用户设备接收不到寻呼消息的问题。
实施例五
图8示出了用户设备80的结构图，其中，所述用户设备用户执行实施例二所述的寻呼方法，如图8所示，所述用户设备80可以包 括：
接收单元801，用于在寻呼位置接收基站发送寻呼调度信息。
其中，所述寻呼调度消息根据所述用户设备的覆盖等级对应的调制编码格式MCS进行编码，用于指示基站向所述用户设备发送的空口寻呼消息所处的位置，所述用户设备的覆盖等级由所述用户设备上报给MME/SGSN，并由所述MME/SGSN下发给所述基站；
所述空口寻呼消息包含一寻呼消息记录列表，寻呼消息记录列表包含至少一个用户设备的寻呼消息，以及用户设备的寻呼消息与用户设备的对应关系；其中，寻呼消息列表中各用户设备的寻呼消息的寻呼位置和覆盖等级与所述用户设备的寻呼位置和覆盖等级相同。
需要说明的是，用户设备计算寻呼位置的方法与基站计算寻呼位置的方法相同，在此不再赘述。
解析单元802，用于根据所述用户设备的当前覆盖等级所对应的MCS对所述接收单元801接收到的寻呼调度信息进行解码。
进一步的，若所述解析单元802成功解析出所述寻呼调度信息，则表示基站发送寻呼调度信息时采用的覆盖等级与用户设备当前的覆盖等级相同或者低于用户设备的当前覆盖等级，如图8A所示，所述用户设备还包括：
获取单元803，用于按照所述寻呼调度信息指示的位置接收所述基站发送的空口寻呼消息，从所述空口寻呼消息中获取所述用户设备的寻呼消息。
进一步的，若所述解析单元802解析所述寻呼调度信息失败，则表示基站发送寻呼调度信息时采用的覆盖等级高于用户设备当前的覆盖等级，如图8B所示，用户设备还包括：
上报单元804，用于向所述MME/SGSN上报所述用户设备的当前覆盖等级。
进一步的，上报单元804具体用于：
向所述基站上报携带有用户设备的当前覆盖等级的随机接入消 息，指示所述基站向MME或者SGSN上报所述用户设备的当前覆盖等级；
或者，向所述基站上报携带有用户设备的当前覆盖的注册Attach消息或者跟踪区更新TAU消息或者路由区更新RAU消息，指示所述基站向MME或者SGSN转发所述Attach消息或者所述TAU消息或者所述RAU消息。
由上可知，本发明实施例提供一种用户设备，当用户设备接收基站发送的寻呼调度信息后，若成功解析出所述寻呼调度信息，则按照所述寻呼调度信息指示的位置接收所述基站发送的空口寻呼消息，从所述空口寻呼消息中获取所述用户设备的寻呼消息；若解析所述寻呼调度信息失败，则向所述基站上报所述用户设备的当前覆盖等级，以使得基站在向用户设备重发寻呼消息时，根据用户设备的当前覆盖等级向用户设备重发消息，实现了M2M通信系统中基站根据用户设备的覆盖等级向用户设备发送寻呼消息，不仅使处于不同覆盖区域的用户设备在一定程度上能够正确接收到寻呼消息，同时减少了重发寻呼消息的次数；避免了现有基站向用户设备发送寻呼消息时未考虑用户设备所处位置的覆盖强度，而导致用户设备所处位置覆盖强度很差时，用户设备接收不到寻呼消息的问题。
实施例六
图9示出了寻呼系统的结构图，所述寻呼系统用于执行实施例三所述的寻呼方法，如图9所示，所述寻呼系统可以包括：基站90、至少一个用户设备91以及核心网设备92；
其中，基站90与上述实施例四种的基站70功能相同，用户设备91与上述实施例五种的用户设备80功能相同，在此不再赘述。
核心网设备92可以为MME或者SGSN，用于向基站90发送M2M91的寻呼消息，或者发送用于指示重新发送所述用户设备的寻呼消息的重发指示信息。
由上可知，本发明实施例提供一种寻呼系统，基站接收核心网设备发送的用户设备的寻呼消息后，计算所述用户设备的寻呼位置， 并根据确定到的所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息，以及在所述寻呼位置上发送寻呼调度信息；用户设备接收到基站发送的寻呼调度信息后，解析寻呼调度消息，获取寻呼消息，若解析成功则返回响应消息；若解析失败，则上报用户设备的当前覆盖等级，使得基站根据该当前覆盖等级向用户设备重发寻呼消息，或者不上报当前覆盖等级，使得基站根据重新确定的覆盖等级向用户设备重发寻呼消息；实现了M2M通信系统中基站根据用户设备的覆盖等级向用户设备发送寻呼消息，不仅使处于不同覆盖区域的用户设备在一定程度上能够正确接收到寻呼消息，同时减少了重发寻呼消息的次数；避免了现有基站向用户设备发送寻呼消息时未考虑用户设备所处位置的覆盖强度，而导致用户设备所处位置覆盖强度很差时，用户设备接收不到寻呼消息的问题。
实施例七
图10示出了基站的结构图，所述基站用于执行实施例一所述的寻呼方法，如图10所示，所述基站100可以包括：通信单元1001，处理器1002、存储器1003、至少一个通信总线1004，用于实现这些设备之间的连接和相互通信；
通信单元1001，用于与外部网元之间进行数据传输；
处理器1002可能是一个中央处理器(英文：central processing unit，简称为CPU)；
存储器1003，可以是易失性存储器(英文：volatile memory)，例如随机存取存储器(英文：random-access memory，缩写：RAM)；或者非易失性存储器(英文：non-volatile memory)，例如只读存储器(英文：read-only memory，缩写：ROM)，快闪存储器(英文：flash memory)，硬盘(英文：hard disk drive，缩写：HDD)或固态硬盘(英文：solid-state drive，缩写：SSD)；或者上述种类的存储器的组合，并向处理器1002提供指令和数据。
通信单元1001，用于接收用户设备的寻呼消息。
其中，寻呼消息包含所述用户设备的用户标识，用于唤醒空闲 状态下的用户设备。
处理器1002，用于根据通信单元1001接收的用户标识，计算所述用户设备的寻呼位置。
其中，寻呼位置用于发送寻呼调度信息；寻呼调度信息用于指示基站向用户设备发送空口寻呼消息的发送位置。需要说明的是，本发明实施例中寻呼消息调度周期的帧格式与图1是不同的，如图4所示，本发明实时中，每个寻呼周期包含若干个寻呼超帧(Paging Super Frame)，每个寻呼超帧包含若干个寻呼机会(Paging Occasion)，其中，寻呼机会为一个无线帧，相当于图1中的寻呼帧，寻呼机会即为寻呼位置，用于承载下行控制信息(Downlink Control Information，DCI)，如寻呼调度信息，每个下行控制信息占用一个无线子帧，相当于占用图1中的一个寻呼机会。
所述处理器1002，还用于根据通信单元1001接收的用户标识，确定所述用户设备的覆盖等级。
其中，所述覆盖等级用于表示用户设备所处位置的网络覆盖强度，可以根据系统规定划分为不同的等级；通常情况下，窄带系统中设计3个覆盖等级，分别为：0级、1级、2级，覆盖等级越高表示网络覆盖强度越小，越需要采用能够增强网络覆盖强度的编码调制方式。所述覆盖等级可以包含在所述寻呼消息中，或者，预先存储在所述基站中。
此外，若所述覆盖等级未包含在所述寻呼消息中，或者，未预先存储在所述基站中，则处理器1002确定所述用户设备的覆盖等级为最差覆盖等级。
所述通信单元1001，还用于根据处理器1002确定的所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息，以及在处理器1002计算出的寻呼位置上发送寻呼调度信息；其中，所述寻呼调度信息用于指示所述空口寻呼消息的发送位置，所述空口寻呼消息包含所述用户设备的寻呼消息。
其中，空口寻呼消息为在同一个空口上的发射的一个或多个 M2M的寻呼消息，
进一步的，所述通信单元1001具体用于：
通过S 1接收MME发送的用户设备的寻呼消息；或者通过Gb接口接收SGSN发送的用户设备的寻呼消息。
进一步的，所述处理器1002具体用于：
根据网络配置的寻呼周期、寻呼超帧密度以及用户设备的设备标识计算所述寻呼超帧；如根据公式：SFN mod T＝(T div N)*(UE_ID mod N)确定寻呼位置所处的寻呼超帧；
根据一个寻呼超帧内寻呼机会的个数、用户设备的设备标识以及寻呼超帧密度计算所述寻呼机会；如根据公式：PO＝floor(UE_ID/N)mod Ns确定寻呼位置所处的寻呼机会。
其中，上述公式中的符号：“mod”表示对两个整数相除取余；“div”表示：对两个整数相除；“*”表示对两个整数相乘；“floor”表示向下取整；“/”表示对两个相除。
上述公式中的参数：UE_ID表示用户设备的设备标识，用于识别用户设备，可以为下述任一种识别码：国际移动用户识别码(英文：International Mobile Subscriber Identification Number，缩写：IMSI)、临时识别码(英文：Temporary Mobile Subscriber Identity，缩写：TMSI)、全球唯一临时UE标识Globally Unique Temporary UE Identity、移动设备国际身份码(英文：International Mobile Equipment Identity，缩写：IMEI)。
T表示寻呼周期。
Ns表示一个下行控制信息间隔(DCI interval)中寻呼机会(PO)的个数，取值为Ns＝ceil(the length of a super frame/the length of DCI interval)，即寻呼机会的个数等于寻呼超帧的长度与下行控制信息间隔的除数向上取整后的整数值；比如：在当前M2M通信系统中，超帧的长度为64个无线帧(radio frame)，此时，若DCI interval为64个radio frame，则Ns最多为1；若DCI interval为32个radio frame，Ns最多为2；若DCI interval为1个radio frame，则Ns最多为64 个。
N表示一个寻呼周期中寻呼超帧的密度；比如：N＝T/4表示一个寻呼周期T内每4个超帧才可能有一次寻呼超帧；N＝T/2表示一个寻呼周期T内每偶数个超帧才有一次寻呼超帧；N＝T表示一个寻呼周期T内每个超帧都可能是寻呼超帧。
进一步的，所述通信单元1001具体用于：
将与所述用户设备的寻呼位置和覆盖等级相同的寻呼消息合并在同一个寻呼记录列表内；
将所述寻呼记录列表包含在与所述用户设备对应的空口寻呼消息里；
根据预设的覆盖等级与调制编码格式MCS的对应关系，采用与所述用户设备的覆盖等级对应的MCS对所述空口寻呼消息进行调制编码向所述用户设备发送。
其中，所述寻呼记录列表包含：寻呼消息、以及寻呼消息与用户设备的对应关系。
覆盖等级与调制编码格式MCS的对应关系是M2M通信过程中根据需要进行设置的，本发明实施例对比不进行限定。
例如，若用户设备1的寻呼位置中寻呼超帧为第1个超帧、寻呼机会为第6个无线帧，且用户设备1的覆盖等级为1，用户设备2的寻呼位置中寻呼超帧为第1个超帧、寻呼机会为第6个无线帧，且用户设备2的覆盖等级为1，用户设备3的寻呼位置中寻呼超帧为第1个超帧、寻呼机会为第6个无线帧，且用户设备3的覆盖等级为1，则可以将用户设备1、用户设备2和用户设备3的寻呼消息合并在同一个寻呼记录列表，并将该寻呼记录列表通过一个空口发射出去。
显然，基站可以采用默认的编码调制方式(如最差覆盖等级对应的编码调制方式)发送寻呼消息；可以根据MME/SGSN发送的用户设备的覆盖等级，采用相应的编码调制方式传输寻呼消息；还可以根据基站内部存储的用户设备的覆盖等级，采用相应的编码调 制方式传输寻呼消息集；实现了根据用户设备的覆盖等级向用户设备发送寻呼消息，在一定程度上使处于不同覆盖等级的用户设备确定到自身对应的寻呼消息，并向MME/SGSN返回一个指示寻呼成功的响应消息。但是，由于用户设备会有一定的移动且用户设备所处的通信环境具有变化性，基站本次确定的用户设备的覆盖等级并不能准确代表用户设备的当前覆盖等级，若根据该覆盖等级对应的MCS进行编码调制发送寻呼消息，则会使得用户设备因解析不出寻呼调度信息而获取不到寻呼消息，进而引起重发寻呼消息。
因此，为了减少重发用户设备的寻呼消息的次数，进一步的，所述处理器1002，还用于若通信单元1001接收到用于指示重新发送所述用户设备的寻呼消息的重发指示信息，则重新确定所述用户设备的覆盖等级；
所述通信单元1001，还用于根据处理器1002重新确定的所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息。
进一步的，所述处理器1002具体用于：
若所述通信单元1001接收到的重发指示消息中包含用户设备的当前覆盖等级，则确定所述用户设备的覆盖等级为当前覆盖等级；
或者，若所述通信单元1001接收到的所述重发指示消息中未包含所述用户设备的当前覆盖等级，则降低所述用户设备的覆盖等级到次一级的覆盖等级，或者确定所述用户设备的覆盖等级为最差覆盖等级。
由上可知，本发明实施例提供一种基站，当基站接收到用户设备的寻呼消息时，计算所述用户设备的寻呼位置，确定所述用户设备的覆盖等级；根据所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息，以及在所述寻呼位置上发送寻呼调度信息；其中，所述寻呼调度信息用于指示所述空口寻呼消息的发送位置，所述空口寻呼消息包含所述用户设备的寻呼消息，实现了M2M通信系统中基站根据用户设备的覆盖等级向用户设备发送寻呼消息，不仅使处于不同覆盖区域的用户设备在一定程度上能够正确接收到寻呼消息，同时减少了重发寻呼消息的次数；避免了现有基站向用户设备 发送寻呼消息时未考虑用户设备所处位置的覆盖强度，而导致用户设备所处位置覆盖强度很差时，用户设备接收不到寻呼消息的问题。
实施例八
图11示出了用户设备的结构图，所述用户设备用于执行实施例二所述的寻呼方法，如图11所示，所述用户设备110可以包括：通信单元1101，处理器1102、存储器1103、至少一个通信总线1104，用于实现这些设备之间的连接和相互通信；
通信单元1101，用于与外部网元之间进行数据传输；
处理器1102可能是一个中央处理器(英文：central processing unit，简称为CPU)；
存储器1103，可以是易失性存储器(英文：volatile memory)，例如随机存取存储器(英文：random-access memory，缩写：RAM)；或者非易失性存储器(英文：non-volatile memory)，例如只读存储器(英文：read-only memory，缩写：ROM)，快闪存储器(英文：flash memory)，硬盘(英文：hard disk drive，缩写：HDD)或固态硬盘(英文：solid-state drive，缩写：SSD)；或者上述种类的存储器的组合，并向处理器1102提供指令和数据。
通信单元1101，用于在寻呼位置接收基站发送寻呼调度信息。
其中，所述寻呼调度消息根据所述用户设备的覆盖等级对应的调制编码格式MCS进行编码，用于指示基站向所述用户设备发送的空口寻呼消息所处的位置，所述用户设备的覆盖等级由所述用户设备上报给MME/SGSN，并由所述MME/SGSN下发给所述基站；
所述空口寻呼消息包含一寻呼消息记录列表，寻呼消息记录列表包含至少一个用户设备的寻呼消息，以及用户设备的寻呼消息与用户设备的对应关系；其中，寻呼消息列表中各用户设备的寻呼消息的寻呼位置和覆盖等级与所述用户设备的寻呼位置和覆盖等级相同。
需要说明的是，用户设备计算寻呼位置的方法与基站计算寻呼位置的方法相同，在此不再赘述。
处理器1102，用于根据所述用户设备的当前覆盖等级所对应的MCS对所述通信单元1101接收到的寻呼调度信息进行解码。
进一步的，所述处理器1102，还用于若所述处理器1102成功解析出所述寻呼调度信息，则表示基站发送寻呼调度信息时采用的覆盖等级与用户设备当前的覆盖等级相同或者低于用户设备的当前覆盖等级，按照所述寻呼调度信息指示的位置接收所述基站发送的空口寻呼消息，从所述空口寻呼消息中确定所述用户设备的寻呼消息。
进一步的，所述通信单元1101，还用于若所述用户设备解析所述寻呼调度信息失败，则表示基站发送寻呼调度信息时采用的覆盖等级高于用户设备当前的覆盖等级，向所述MME/SGSN上报所述用户设备的当前覆盖等级。
进一步的，所述通信单元1101具体用于：
向所述基站上报携带有用户设备的当前覆盖等级的随机接入消息，指示所述基站向MME或者SGSN上报所述用户设备的当前覆盖等级；
或者，向所述基站上报携带有用户设备的当前覆盖的注册Attach消息或者跟踪区更新TAU消息或者路由区更新RAU消息，指示所述基站向MME或者SGSN转发所述Attach消息或者所述TAU消息或者所述RAU消息。
由上可知，本发明实施例提供一种用户设备，当用户设备接收基站发送的寻呼调度信息后，若成功解析出所述寻呼调度信息，则按照所述寻呼调度信息指示的位置接收所述基站发送的空口寻呼消息，从所述空口寻呼消息中获取所述用户设备的寻呼消息；若解析所述寻呼调度信息失败，则向所述基站上报所述用户设备的当前覆盖等级，以使得基站在向用户设备重发寻呼消息时，根据用户设备的当前覆盖等级向用户设备重发消息，实现了M2M通信系统中基站根据用户设备的覆盖等级向用户设备发送寻呼消息，不仅使处于不同覆盖区域的用户设备在一定程度上能够正确接收到寻呼消息，同 时减少了重发寻呼消息的次数；避免了现有基站向用户设备发送寻呼消息时未考虑用户设备所处位置的覆盖强度，而导致用户设备所处位置覆盖强度很差时，用户设备接收不到寻呼消息的问题。
实施例九
图12示出了寻呼系统的结构图，所述寻呼系统用于执行实施例三所述的寻呼方法，如图12所示，所述寻呼系统可以包括：
基站120、至少一个用户设备121以及核心网设备122；
其中，基站120与上述实施例七种的基站100功能相同，用户设备121与上述实施例八种的用户设备110功能相同，在此不再赘述。
核心网设备122可以为MME或者SGSN，用于向基站120发送M2M121的寻呼消息，或者发送用于指示重新发送所述用户设备的寻呼消息的重发指示信息。
由上可知，本发明实施例提供一种寻呼系统，基站接收核心网设备发送的用户设备的寻呼消息后，计算所述用户设备的寻呼位置，并根据确定到的所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息，以及在所述寻呼位置上发送寻呼调度信息；用户设备接收到基站发送的寻呼调度信息后，解析寻呼调度消息，获取寻呼消息，若解析成功则返回响应消息；若解析失败，则上报用户设备的当前覆盖等级，使得基站根据该当前覆盖等级向用户设备重发寻呼消息，或者不上报当前覆盖等级，使得基站根据重新确定的覆盖等级向用户设备重发寻呼消息；实现了M2M通信系统中基站根据用户设备的覆盖等级向用户设备发送寻呼消息，不仅使处于不同覆盖区域的用户设备在一定程度上能够正确接收到寻呼消息，同时减少了重发寻呼消息的次数；避免了现有基站向用户设备发送寻呼消息时未考虑用户设备所处位置的覆盖强度，而导致用户设备所处位置覆盖强度很差时，用户设备接收不到寻呼消息的问题。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技 术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。

Claims (32)

  1. 一种寻呼方法，其特征在于，所述方法包括：
    基站接收用户设备的寻呼消息；其中，所述寻呼消息包含有所述用户设备的用户标识；
    根据所述用户设备的用户标识，计算所述用户设备的寻呼位置，以及确定所述用户设备的覆盖等级；
    根据所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息，以及在所述寻呼位置上发送寻呼调度信息；其中，所述寻呼调度信息用于指示所述空口寻呼消息的发送位置，所述空口寻呼消息包含所述用户设备的寻呼消息。
  2. 根据权利要求1所述的寻呼方法，其特征在于，所述确定所述用户设备的覆盖等级包括：
    若所述寻呼消息未携带有所述用户设备的覆盖等级且所述基站也未存贮所述用户设备与覆盖等级的对应关系，则确定所述用户设备的覆盖等级为最差覆盖等级。
  3. 根据权利要求1或2所述的寻呼方法，其特征在于，所述根据所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息包括：
    将与所述用户设备的寻呼位置和覆盖等级相同的寻呼消息合并在同一个寻呼记录列表内；
    将所述寻呼记录列表包含在与所述用户设备对应的空口寻呼消息里；
    根据预设的覆盖等级与调制编码格式MCS的对应关系，采用与所述用户设备的覆盖等级对应的MCS对所述空口寻呼消息进行调制编码向所述用户设备发送。
  4. 根据权利要求1-3任一项所述的寻呼方法，其特征在于，所述基站接收用户设备的寻呼消息包括：
    所述基站接收移动性管理实体MME或者服务通用分组无线服务技术支持节点SGSN发送的所述用户设备的寻呼消息。
  5. 根据权利要求4所述的寻呼方法，其特征在于，所述计算所 述用户设备的寻呼位置包括：
    根据网络配置的寻呼周期、寻呼超帧密度以及用户设备的设备标识计算所述寻呼位置所处的寻呼超帧；
    根据一个寻呼超帧内寻呼机会的个数、用户设备的设备标识以及寻呼超帧密度计算所述寻呼位置所处的寻呼机会；
    其中，寻呼超帧内寻呼机会的个数根据寻呼超帧的长度和下行控制信息间隔确定。
  6. 根据权利要求1-5任一项所述的寻呼方法，其特征在于，所述方法还包括：
    若基站接收到用于指示重新发送所述用户设备的寻呼消息的重发指示信息，则重新确定所述用户设备的覆盖等级；
    根据重新确定的所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息。
  7. 根据权利要求6所述的寻呼方法，其特征在于，所述重新确定所述用户设备的覆盖等级包括：
    若所述基站接收到的重发指示消息中包含所述用户设备的当前覆盖等级，则确定所述用户设备的覆盖等级为当前覆盖等级；
    或者，若所述基站接收到的所述重发指示消息中未包含所述用户设备的当前覆盖等级，则降低所述用户设备的覆盖等级到次一级的覆盖等级，或者确定所述用户设备的覆盖等级为最差覆盖等级。
  8. 一种寻呼方法，其特征在于，包括：
    用户设备在寻呼位置接收基站发送寻呼调度信息；其中，所述寻呼调度消息根据所述用户设备的覆盖等级对应的调制编码格式MCS进行编码，用于指示基站向所述用户设备发送的空口寻呼消息所处的位置，所述用户设备的覆盖等级由所述用户设备上报给MME/SGSN，并由所述MME/SGSN下发给所述基站；
    所述用户设备根据所述用户设备的当前覆盖等级所对应的MCS对所述寻呼调度信息进行解码。
  9. 根据权利要求8所述的寻呼方法，其特征在于，所述方法还 包括：
    若所述用户设备成功解析出所述寻呼调度信息，则按照所述寻呼调度信息指示的位置接收所述基站发送的空口寻呼消息，从所述空口寻呼消息中获取所述用户设备的寻呼消息；
    或者，若所述用户设备解析所述寻呼调度信息失败，则通过所述基站向所述MME/SGSN上报所述用户设备的当前覆盖等级。
  10. 根据权利要求9所述的寻呼方法，其特征在于，所述通过所述基站向所述MME/SGSN上报所述用户设备的当前覆盖等级包括：
    所述用户设备向所述基站上报携带有用户设备的当前覆盖等级的随机接入消息，指示所述基站向MME或者SGSN上报所述用户设备的当前覆盖等级；
    或者，所述用户设备向所述基站上报携带有用户设备的当前覆盖的注册Attach消息或者跟踪区更新TAU消息或者路由区更新RAU消息，指示所述基站向MME或者SGSN转发所述Attach消息或者所述TAU消息或者所述RAU消息。
  11. 一种基站，其特征在于，包括：
    接收单元，用于接收用户设备的寻呼消息；其中，所述寻呼消息包含所述用户设备的用户标识；
    计算单元，用于根据所述接收单元接收到的用户标识，计算所述用户设备的寻呼位置；
    确定单元，用于根据所述接收单元接收到的用户标识，确定所述用户设备的覆盖等级；
    发送单元，用于根据所述确定单元确定的所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息，以及在所述计算单元计算的寻呼位置上发送寻呼调度信息；其中，所述寻呼调度信息用于指示所述空口寻呼消息的发送位置，所述空口寻呼消息包含所述用户设备的寻呼消息。
  12. 根据权利要求12所述的基站，其特征在于，所述确定单元具体用于：
    若所述寻呼消息未携带有所述用户设备的覆盖等级且所述基站也未存贮所述用户设备与覆盖等级的对应关系，则确定所述用户设备的覆盖等级为最差覆盖等级。
  13. 根据权利要求11或12所述的基站，其特征在于，所述发送单元具体用于：
    将与所述用户设备的寻呼位置和覆盖等级相同的寻呼消息合并在同一个寻呼记录列表内；
    将所述寻呼记录列表包含在与所述用户设备对应的空口寻呼消息里；
    根据预设的覆盖等级与调制编码格式MCS的对应关系，采用与所述用户设备的覆盖等级对应的MCS对所述空口寻呼消息进行调制编码向所述用户设备发送。
  14. 根据权利要求11-13任一项所述的基站，其特征在于，所述接收单元具体用于：
    接收MME或者SGSN发送的所述用户设备的寻呼消息。
  15. 根据权利要求14所述的基站，其特征在于，所述计算单元具体用于：
    根据网络配置的寻呼周期、寻呼超帧密度以及用户设备的设备标识计算所述寻呼位置所处的寻呼超帧；
    根据一个寻呼超帧内寻呼机会的个数、用户设备的设备标识以及寻呼超帧密度计算所述寻呼位置所处的寻呼机会；
    其中，寻呼超帧内寻呼机会的个数根据寻呼超帧的长度和下行控制信息间隔确定。
  16. 根据权利要求11-15任一项所述的基站，其特征在于，
    所述确定单元，还用于若所述接收单元接收到用于指示重新发送所述用户设备的寻呼消息的重发指示信息，则重新确定所述用户设备的覆盖等级；
    所述发送单元，还用于根据所述确定单元重新确定的所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息。
  17. 根据权利要求16所述的基站，其特征在于，所述确定单元具体用于：
    若所述基站接收到的重发指示消息中包含用户设备的当前覆盖等级，则确定所述用户设备的覆盖等级为当前覆盖等级；
    或者，若所述基站接收到的所述重发指示消息中未包含所述用户设备的当前覆盖等级，则降低所述用户设备的覆盖等级到次一级的覆盖等级，或者确定所述用户设备的覆盖等级为最差覆盖等级。
  18. 一种用户设备，其特征在于，包括：
    接收单元，用于在寻呼位置接收基站发送寻呼调度信息；其中，所述寻呼调度消息根据所述用户设备的覆盖等级对应的调制编码格式MCS进行编码，用于指示基站向所述用户设备发送的空口寻呼消息所处的位置，所述用户设备的覆盖等级由所述用户设备上报给MME/SGSN，并由所述MME/SGSN下发给所述基站；
    解析单元，用于根据所述用户设备的当前覆盖等级所对应的MCS对所述接收单元接收的寻呼调度信息进行解码。
  19. 根据权利要求18所述的用户设备，其特征在于，所述用户设备还包括：
    获取单元，用于若所述解析单元成功解析出所述寻呼调度信息，按照所述接收单元接收的寻呼调度信息指示的位置接收所述基站发送的空口寻呼消息，从所述空口寻呼消息中获取所述用户设备的寻呼消息；
    上报单元，用于若所述解析单元解析所述寻呼调度信息失败，向所述基站上报所述用户设备的当前覆盖等级。
  20. 根据权利要求19所述的用户设备，其特征在于，所述上报单元具体用于：
    向所述基站上报携带有用户设备的当前覆盖等级的随机接入消息，指示所述基站向MME或者SGSN上报所述用户设备的当前覆盖等级；
    或者，向所述基站上报携带有用户设备的当前覆盖的注册Attach 消息或者跟踪区更新TAU消息或者路由区更新RAU消息，指示所述基站向MME或者SGSN转发所述Attach消息或者所述TAU消息或者所述RAU消息。
  21. 一种寻呼系统，其特征在于，包括：如权利要求11-17任一项所述的基站、如权利要求18-20任一项所述的用户设备、以及核心网设备；
    其中，所述核心网设备为MME或者SGSN。
  22. 一种基站，其特征在于，包括：
    通信单元，用于接收机器对机器用户设备的寻呼消息；其中，所述寻呼消息包含所述用户设备的用户标识；
    处理器，用于根据所述通信单元接收到用户标识，计算所述用户设备的寻呼位置，以及确定所述用户设备的覆盖等级；
    所述通信单元，还用于根据所述处理器确定的所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息，以及在所述处理器计算的寻呼位置上发送寻呼调度信息；其中，所述寻呼调度信息用于指示所述空口寻呼消息的发送位置，所述空口寻呼消息包含所述用户设备的寻呼消息。
  23. 根据权利要求22所述的基站，其特征在于，所述处理器具体用于：
    若所述寻呼消息未携带有所述用户设备的覆盖等级且所述基站也未存贮所述用户设备与覆盖等级的对应关系，则确定所述用户设备的覆盖等级为最差覆盖等级。
  24. 根据权利要求22或23所述的基站，其特征在于，所述通信单元具体用于：
    将与所述用户设备的寻呼位置和覆盖等级相同的寻呼消息合并在同一个寻呼记录列表内；
    将所述寻呼记录列表包含在与所述用户设备对应的空口寻呼消息里；
    根据预设的覆盖等级与调制编码格式MCS的对应关系，采用与 所述用户设备的覆盖等级对应的MCS对所述空口寻呼消息进行调制编码向所述用户设备发送。
  25. 根据权利要求22-24任一项所述的基站，其特征在于，所述通信单元具体用于：
    接收MME或者SGSN发送的所述用户设备的寻呼消息。
  26. 根据权利要求25所述的基站，其特征在于，所述处理器具体用于：
    根据网络配置的寻呼周期、寻呼超帧密度以及用户设备的设备标识计算所述寻呼位置所处的寻呼超帧；
    根据一个寻呼超帧内寻呼机会的个数、用户设备的设备标识以及寻呼超帧密度计算所述寻呼位置所处的寻呼机会；
    其中，寻呼超帧内寻呼机会的个数根据寻呼超帧的长度和下行控制信息间隔确定。
  27. 根据权利要求22-26任一项所述的基站，其特征在于，
    所述处理器，还用于若所述通信单元接收到用于指示重新发送所述用户设备的寻呼消息的重发指示信息，则重新确定所述用户设备的覆盖等级；
    所述通信单元，还用于根据所述处理器重新确定的所述用户设备的覆盖等级向所述用户设备发送空口寻呼消息。
  28. 根据权利要求27所述的基站，其特征在于，所述处理器具体用于：
    若所述基站接收到的重发指示消息中包含用户设备的当前覆盖等级，则确定所述用户设备的覆盖等级为当前覆盖等级；
    或者，若所述基站接收到的所述重发指示消息中未包含所述用户设备的当前覆盖等级，则降低所述用户设备的覆盖等级到次一级的覆盖等级，或者确定所述用户设备的覆盖等级为最差覆盖等级。
  29. 一种用户设备，其特征在于，包括：
    通信单元，用于在寻呼位置接收基站发送寻呼调度信息；其中，所述寻呼调度消息根据所述用户设备的覆盖等级对应的调制编码格 式MCS进行编码，用于指示基站向所述用户设备发送的空口寻呼消息所处的位置，所述用户设备的覆盖等级由所述用户设备上报给MME/SGSN，并由所述MME/SGSN下发给所述基站；
    处理器，用于根据所述用户设备的当前覆盖等级所对应的MCS对所述通信单元接收到的寻呼调度信息进行解码。
  30. 根据权利要求29所述的用户设备，其特征在于，
    所述处理器，还用于若所述处理器成功解析出所述寻呼调度信息，按照所述寻呼调度信息指示的位置接收所述基站发送的空口寻呼消息，从所述空口寻呼消息中获取所述用户设备的寻呼消息；
    所述通信单元，还用于若所述处理器解析所述寻呼调度信息失败，向所述基站上报所述用户设备的当前覆盖等级。
  31. 根据权利要求30所述的用户设备，其特征在于，所述通信单元具体用于：
    向所述基站上报携带有用户设备的当前覆盖等级的随机接入消息，指示所述基站向MME或者SGSN上报所述用户设备的当前覆盖等级；
    或者，向所述基站上报携带有用户设备的当前覆盖的注册Attach消息或者跟踪区更新TAU消息或者路由区更新RAU消息，指示所述基站向MME或者SGSN转发所述Attach消息或者所述TAU消息或者所述RAU消息。
  32. 一种寻呼系统，其特征在于，包括：如权利要求22-28任一项所述的基站、如权利要求29-31任一项所述的用户设备、以及核心网设备；
    其中，所述核心网设备为MME或者SGSN。
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