WO2016045007A1 - 一种接入网节点及寻呼方法 - Google Patents

一种接入网节点及寻呼方法 Download PDF

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Publication number
WO2016045007A1
WO2016045007A1 PCT/CN2014/087264 CN2014087264W WO2016045007A1 WO 2016045007 A1 WO2016045007 A1 WO 2016045007A1 CN 2014087264 W CN2014087264 W CN 2014087264W WO 2016045007 A1 WO2016045007 A1 WO 2016045007A1
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Prior art keywords
terminal
message
network node
access network
paging message
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PCT/CN2014/087264
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English (en)
French (fr)
Inventor
刘蕾
赵旸
张崇铭
肖洁华
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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.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2014/087264 priority Critical patent/WO2016045007A1/zh
Priority to CN201480033318.8A priority patent/CN105637956B/zh
Priority to CN201910226788.0A priority patent/CN110062358A/zh
Publication of WO2016045007A1 publication Critical patent/WO2016045007A1/zh

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    • 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

Definitions

  • the present invention relates to the field of communications, and in particular, to an access network node and a paging method.
  • Machine to Machine (M2M) terminals have been widely used in smart power, intelligent transportation, smart home and other fields.
  • remote meter reading services can be realized through M2M terminals.
  • M2M terminals When the M2M terminal is in the standby state, if the network side needs to send packet data to the M2M terminal, the paging message is first sent to the M2M terminal, and the M2M terminal is learned according to the paging response message fed back by the terminal. The information of the cell is then established with the M2M terminal according to the information of the cell where the M2M terminal is located, and the packet data can be sent to the M2M terminal through the established service connection. Since the M2M terminal is usually deployed in a closed space such as a basement, the network side needs to use the coverage enhancement technology when sending a paging message to the M2M terminal in order to successfully page to the M2M terminal.
  • the access network node can successfully page to the M2M terminal by repeatedly transmitting a plurality of paging messages to the M2M terminal. For example, the access network node repeatedly sends the paging message twice to the M2M terminal, so that the M2M terminal can be successfully paged.
  • the specific process of the access network node repeatedly sending the paging message to the M2M terminal is: access After receiving the paging message sent by the core network node, the network node first calculates a paging subchannel for transmitting the paging message according to the International Mobile Subscriber Identity (IMI) of the M2M terminal. And then sending a paging message to the M2M terminal for the first time on the paging subchannel.
  • IMI International Mobile Subscriber Identity
  • the access network node In order to reduce the power consumption of the M2M terminal and ensure that other terminals can also be paged, the access network node needs to wait for a paging cycle. After that, the paging message can be sent to the M2M terminal a second time on the paging subchannel.
  • the invention provides an access network node and a paging method, which solves the problem that a paging connection time caused by an access network node repeatedly sending a paging message to an M2M terminal is long.
  • a first aspect of the present invention provides an access network node, including: a communication interface, a processor, and a transmitter;
  • the communication interface is configured to receive a first paging message sent by a core network node, where the first paging message is used for paging a terminal;
  • the processor is configured to generate a message sub-block when the terminal is determined to be a machine-to-machine M2M terminal according to the first paging message received by the communication interface, where the message sub-block includes the terminal Identifying, and generating a second paging message according to the repetition parameter and the message sub-block, the repetition parameter is used to indicate that the total number of the message sub-blocks is repeatedly sent, and the second paging message includes N
  • N is a positive integer greater than 1, and the N is less than or equal to the repeating parameter;
  • the transmitter is configured to send the second paging message to the terminal at least once, such that the number of all repeatedly sent message sub-blocks is greater than or equal to the repeating parameter.
  • the access network node further includes: a memory; the repetition parameter is pre-stored in the memory; the processor is further configured to read The repeating parameters pre-stored in the memory are taken.
  • the first paging message includes a coverage level of the terminal
  • the processor is further configured to determine, according to a coverage level of the terminal, an enhancement level that is covered when the terminal is paged, and determine the repetition parameter according to the coverage enhancement level.
  • the a paging message includes an international mobile subscriber identity IMSI of the terminal;
  • the processor is further configured to acquire, according to an IMSI of the terminal and a pre-stored mapping relationship table, a coverage level of the terminal, where the mapping relationship table includes the IMSI, and the foregoing corresponding to the IMSI a coverage level of the terminal; determining an enhancement level covered when the terminal is paged according to the coverage level of the terminal, and determining the repetition parameter according to the coverage enhancement level.
  • the processor is specifically configured to use the repeating parameter and the preset Performing a length L1 of the second paging message before channel coding, repeating the message sub-block N times to obtain N message sub-blocks, and performing channel coding on the N message sub-blocks to generate the second homing Call the message.
  • the N is equal to the repeating parameter
  • the N is less than or equal to Said Indicates rounding down, the L2 being the length of the message sub-block.
  • the transmitter is specifically configured to: when the N is equal to the repeating parameter, The terminal sends the second paging message once; when the N is smaller than the repetition parameter, the second paging message is repeatedly sent to the terminal at least twice.
  • a second aspect of the present invention provides a paging method, including:
  • the access network node Receiving, by the access network node, a first paging message sent by the core network node; the first paging message is used for paging the terminal;
  • the access network node When the access network node determines, according to the first paging message, that the terminal is a machine-to-machine M2M terminal, the access network node generates a message sub-block, where the message sub-block includes an identifier of the terminal;
  • the access network node generates a second paging message according to the repetition parameter and the message sub-block, where the repetition parameter is used to indicate that the total number of the message sub-blocks is repeatedly sent, where the second paging message is Containing N pieces of the message sub-block, the N being a positive integer greater than 1, and the N being less than or equal to the repeating parameter;
  • the access network node sends the second paging message to the terminal at least once, such that the number of all the message sub-blocks repeatedly transmitted is greater than or equal to the repetition parameter.
  • the repetition parameter is pre-stored in the access network node
  • the method Before the generating, by the access network node, the second paging message according to the repetition parameter and the message sub-block, the method further includes:
  • the access network node reads the repeated parameters pre-stored in the access network node.
  • the first paging message includes a coverage level of the terminal
  • the method Before the generating, by the access network node, the second paging message according to the repetition parameter and the message sub-block, the method further includes:
  • the access network node determines, according to the coverage level of the terminal, an enhancement level that is covered when the terminal is paged, and determines the repetition parameter according to the coverage enhancement level.
  • the first paging message includes an international mobile subscriber identity (IMSI) of the terminal;
  • IMSI international mobile subscriber identity
  • the method Before the generating, by the access network node, the second paging message according to the repetition parameter and the message sub-block, the method further includes:
  • mapping relationship table includes the IMSI, and the terminal corresponding to the IMSI Coverage level
  • the access network node determines, according to the coverage level of the terminal, an enhancement level that is covered when the terminal is paged, and determines the repetition parameter according to the coverage enhancement level.
  • the access network node In conjunction with the second aspect of the present invention to the third possible implementation of the second aspect, in a fourth possible implementation manner, the access network node generates a second paging message according to the repetition parameter and the message sub-block, including:
  • the access network node repeats the message sub-block N times to obtain N message sub-blocks according to the repetition parameter and the preset length L1 of the second paging message before channel coding;
  • the access network node performs channel coding on the N message sub-blocks to generate the second paging message.
  • the N is equal to the repeating parameter
  • the N is less than or equal to Said Indicates rounding down, the L2 being the length of the message sub-block.
  • the access network node sends the second paging message to the terminal at least once ,include:
  • the access network node When the N is equal to the repeating parameter, the access network node sends the second paging message to the terminal once;
  • the access network node When the N is smaller than the repetition parameter, the access network node repeatedly sends the second paging message to the terminal at least twice.
  • the access network node and the paging method provided by the embodiment of the present invention may determine, after the access network node receives the first paging message sent by the core network node, whether the paged terminal is an M2M terminal according to the first paging message. And after determining that the paged terminal is an M2M terminal, generating a message sub-block, and generating a message including N (N is a positive integer greater than 1 and less than or equal to a repeating parameter) according to the repeated parameter and the generated message sub-block The second paging message of the sub-block is then sent to the terminal at least once for the second paging message.
  • the second paging message sent by the access network node to the terminal includes N message sub-blocks, that is, the single second paging message sent by the access network node to the terminal carries multiple homing messages.
  • the effect of the coverage enhancement of the paging message of the call message is the same as the coverage enhancement achieved by the paging message that the access network node repeatedly sends the plurality of times to the terminal, but the embodiment provided by the embodiment of the present invention is provided.
  • the number of times the paging message is repeatedly sent to the terminal is reduced, thereby shortening the paging connection duration.
  • FIG. 1 is a schematic structural diagram of an access network node according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of another access network node 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 flowchart of a paging method according to another embodiment of the present invention.
  • FIG. 5 is a schematic diagram of channel coding according to another embodiment of the present invention.
  • FIG. 6 is a schematic diagram of another channel coding according to another embodiment of the present invention.
  • system and “network” are used interchangeably herein.
  • the term “and/or” in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • An embodiment of the present invention provides an access network node, as shown in FIG. 1 , the access network
  • the node may include a communication interface 11, a processor 12, and a transmitter 13.
  • the communication interface 11 is configured to receive a first paging message sent by the core network node, where the first paging message is used to page the terminal.
  • the processor 12 is configured to generate a message sub-block when determining that the terminal is an M2M terminal according to the first paging message received by the communication interface 11, and generate a second paging message according to the repetition parameter and the message sub-block.
  • the message sub-block includes the identifier of the terminal, the repetition parameter is used to indicate the total number of repeated transmission of the message sub-block, the second paging message includes N message sub-blocks, N is a positive integer greater than 1, and N is less than or Equal to the repeat parameter.
  • the transmitter 13 is configured to send the second paging message to the terminal at least once, so that the number of all repeatedly transmitted message sub-blocks is greater than or equal to the repeating parameter.
  • the access network node further includes: a memory 14, and the repetition parameters are pre-stored in the memory 14.
  • the processor 12 is also operative to read the repetitive parameters pre-stored in the memory 14.
  • the first paging message includes a coverage level of the terminal.
  • the processor 12 is further configured to determine an enhancement level covered by the paging terminal according to the coverage level of the terminal, and determine a repetition parameter according to the coverage enhancement level.
  • the first paging message includes the IMSI of the terminal.
  • the processor 12 is further configured to obtain, according to the IMSI of the terminal and the pre-stored mapping relationship table, the coverage level of the terminal, where the mapping relationship table includes the IMSI, and the coverage level of the terminal corresponding to the IMSI; and determining the paging according to the coverage level of the terminal.
  • the level of enhancement covered by the terminal, and the repeating parameters are determined according to the level of enhancement of the coverage.
  • the processor 12 is specifically configured to: repeat the message sub-block N times to obtain N message sub-blocks according to the repetition parameter and the preset length L1 of the second paging message before channel coding, and obtain N message sub-blocks, and N messages
  • the sub-block performs channel coding to generate a second paging message.
  • N is equal to the repetition parameter
  • N is less than or equal to among them, Indicates rounding down, L2 is the length of the message sub-block.
  • the value of N may be based on Calculated, of course, can also be based on Calculated, among them, Indicates rounding up.
  • the specific calculation manner of the N is not limited in this case, and a specific calculation manner may be selected according to different actual application scenarios.
  • the transmitter 13 is specifically configured to: when N is equal to the repeating parameter, send a second paging message to the terminal; when N is less than the repeating parameter, send the second paging message to the terminal at least twice.
  • the access network node After receiving the first paging message sent by the core network node, the access network node according to the embodiment of the present invention may determine whether the paged terminal is an M2M terminal according to the first paging message, and determine the paging terminal. After the M2M terminal, a message sub-block is generated, and according to the repetition parameter and the generated message sub-block, a second page including N (N is a positive integer greater than 1 and less than or equal to a repeating parameter) message sub-block is further generated. The message is then sent to the terminal at least once for the second paging message.
  • N is a positive integer greater than 1 and less than or equal to a repeating parameter
  • the second paging message sent by the access network node to the terminal includes N message sub-blocks, that is, the single second paging message sent by the access network node to the terminal carries multiple paging messages,
  • the coverage enhancement effect achieved is the same as the coverage enhancement achieved by the paging message that the access network node repeatedly transmits to the terminal multiple times.
  • the embodiment provided by the embodiment of the present invention reduces the repeated transmission of paging to the terminal. The number of messages, which shortens the length of the paging connection.
  • Another embodiment of the present invention provides a paging method. As shown in FIG. 3, the method may include:
  • the access network node receives the first paging message sent by the core network node.
  • the first paging message is used for paging the terminal.
  • the terminal When there is no packet data to be transmitted between the terminal and the network side, and no packet data transmission time exceeds the time specified by the T3314 timer, the terminal enters the Standby state from the Ready state. After the terminal enters the Standby state, if the network side needs to send packet data to the terminal, the terminal must be paged first to establish contact with the terminal, and then send packet data to the terminal.
  • the process of the paging terminal is triggered by the core network node, that is, the core network node may send the first paging message for paging the terminal to the access network node, and at this time, the access network node may receive the sending by the core network node. First paging message.
  • the access network node determines, according to the first paging message, that the terminal is an M2M terminal, the access network node generates a message sub-block.
  • the message sub-block includes an identifier of the terminal.
  • the access network node generates a second paging message according to the repetition parameter and the message sub-block.
  • the repetition parameter is used to indicate the total number of repeated transmission of the message sub-block
  • the second paging message includes N message sub-blocks, N is a positive integer greater than 1, and N is less than or equal to the repetition parameter.
  • the access network node may determine, according to the first paging message, whether the paged terminal is an M2M terminal, and generate a message after determining that the paging terminal is an M2M terminal. a sub-block, and further generating a second paging message including N message sub-blocks according to the repetition parameter and the generated message sub-block.
  • the access network node sends the second paging message to the terminal at least once, so that the number of all repeatedly transmitted message sub-blocks is greater than or equal to the repeating parameter.
  • the access network node may calculate, according to the configuration of the last 3 bits of the IMSI of the paging terminal and the configuration of the paging channel, for transmitting the second paging message, because the air interface paging channel resource is limited. Paging the paging subchannel of the message, and then transmitting the second paging message to the terminal at least once on the paging subchannel.
  • the paging method provided by the embodiment of the present invention may determine, after the access network node receives the first paging message sent by the core network node, whether the paged terminal is an M2M terminal according to the first paging message, and determine the homing
  • a message sub-block is generated, and according to the repetition parameter and the generated message sub-block, a message sub-block containing N (N is a positive integer greater than 1 and less than or equal to the repeating parameter) is further generated.
  • N is a positive integer greater than 1 and less than or equal to the repeating parameter
  • the second paging message sent by the node to the terminal includes N message sub-blocks, that is, the single second paging message sent by the access network node to the terminal carries multiple paging messages, and the coverage enhancement achieved by the node
  • the effect of the coverage enhancement is the same as that of the prior art access network node to repeatedly send the paging message to the terminal.
  • the implementation provided by the embodiment of the present invention reduces the number of times the paging message is repeatedly sent to the terminal. Thereby shortening the paging connection duration.
  • Another embodiment of the present invention provides a paging method. As shown in FIG. 4, the method may include:
  • the access network node receives the first paging message sent by the core network node.
  • the first paging message is used for paging the terminal.
  • the process of the paging terminal may be triggered by the core network node.
  • the access network node determines, according to the first paging message, that the terminal is an M2M terminal, the access network node generates a message sub-block.
  • the first paging message may include terminal information for determining a type of the terminal, after the access network node receives the first paging message sent by the core network node, The type of the paged terminal can be determined directly based on the terminal information included in the first paging message.
  • the first paging message may include an IMSI of the terminal, and after receiving the first paging message sent by the core network node, the access network node may query the advance according to the IMSI of the terminal.
  • the stored correspondence table determines the type of the paged terminal.
  • the correspondence table includes the IMSI of the terminal and the type of the terminal corresponding to the IMSI of the terminal.
  • the access network node acquires a repeating parameter.
  • the process of obtaining the repeated parameters by the access network node may be any one of the following modes:
  • Manner 1 The access network node reads the repeated parameters pre-stored in the access network node.
  • the repetition parameter is pre-stored in the access network node, and when the access network node determines that the paged terminal is an M2M terminal according to the first paging message, the storage parameter can be directly read. Repeating parameters.
  • Manner 2 The access network node determines the enhancement level covered by the paging terminal according to the coverage level of the terminal, and determines the repetition parameter according to the determined enhancement level of the coverage.
  • the first paging message received by the access network node includes the coverage level of the terminal.
  • the access network node may determine the paging terminal according to the coverage level of the terminal included in the first paging message.
  • the level of enhancement covered by the time, and the repeating parameters are determined based on the determined level of enhancement of the coverage,
  • the correspondence between the coverage level of the terminal and the enhancement level covered by the access network node paging terminal is as shown in Table 1, and the correspondence between the enhancement level and the repetition parameter covered by the access network node paging terminal is as shown in the table. 2 is shown.
  • the access network node After the access network node determines, according to the received first paging message, that the paged terminal is an M2M terminal, it may query the table 1 according to the coverage level of the terminal included in the first paging message, and determine the paging terminal.
  • the level of enhancement covered, and then according to the determined level of enhancement of the coverage look up Table 2 to determine the repeat parameters.
  • Manner 3 The access network node obtains the coverage level of the terminal according to the IMSI of the terminal and the pre-stored mapping relationship table, and determines the enhancement level covered by the paging terminal according to the obtained coverage level of the terminal, and further determines the coverage according to the coverage.
  • the enhancement level determines the repeat parameters.
  • the mapping relationship table includes an IMSI and a coverage level of the terminal corresponding to the IMSI.
  • the first paging message received by the access network node includes the IMSI of the terminal, and at this time, the access network node may be configured according to the The IMSI of the terminal included in the first paging message and the pre-stored mapping relationship table acquire the coverage level of the terminal, and determine the enhancement level covered by the paging terminal according to the acquired coverage level of the terminal, and further determine the The enhancement level of the coverage determines the repeating parameters, and the mapping relationship table can be composed as shown in Table 3.
  • IMSI Terminal coverage level IMSI 1 10dB
  • IMSI 2 20dB ... ...
  • the access table may be queried according to the IMSI of the terminal included in the first paging message, and the IMSI corresponding to the terminal is determined.
  • the coverage level of the terminal is then queried according to the determined coverage level of the terminal, and the enhancement level covered by the paging terminal is determined. Further, according to the determined enhancement level of the coverage, the table 2 is queried to determine the repetition parameter.
  • the manner in which the access network node obtains the repeated parameters is only an example, and the access network node may obtain the repeated parameters in other manners. In this embodiment of the present invention, the access network node obtains the repeated parameters.
  • the method is not limited. You can select the corresponding acquisition method according to the actual application scenario.
  • the access network node may generate a second paging message according to the repetition parameter and the message sub-block. Specifically, the access network node generates the second homing according to the repetition parameter and the message sub-block.
  • the process of calling a message can be S304:
  • the access network node repeats the message sub-block N times according to the repetition parameter and the preset length L1 of the second paging message before channel coding to obtain N message sub-blocks, and performs channel on the N message sub-blocks.
  • the encoding generates a second paging message.
  • the second paging message includes N message sub-blocks, where N is a positive integer greater than 1, and N is less than or equal to a repeating parameter.
  • the message sub-block includes an identifier of the terminal, and the identifier may be an IMSI or a temporary
  • the mobile subscriber identity (TM: Temporary Mobile Subscriber Identity, TMSI) can also be a packet temporary mobile subscriber identity (English: Packet Temporary Mobile Subscriber Identity, P-TMSI).
  • the length of the IMSI is longer, so that when the identifier of the terminal included in the message sub-block is TMSI or P-TMSI, the second homing before the channel coding is generated by the access network node
  • the number of message sub-blocks included in the call message is smaller than the number of message sub-blocks included in the second paging message before channel coding generated by the access network node when the identifier of the terminal included in the message sub-block is IMSI
  • the identifier of the terminal included in the message sub-block is TMSI or P-TMSI.
  • the message sub-block may further include a Radio Resource Management Protocol Discriminator (English: Radio Resources Management Protocol Discriminator, referred to as: RR Management Protocol Discriminator), Skip Indicator (skip indicator). And Paging Request Type 4 Message Type.
  • the content of the message sub-block may be as shown in Table 4, wherein the Paging Request Type 4 Message Type is used to indicate the new definition of the present invention.
  • Type of paging message As is well known, in the prior art, for a terminal (the terminal includes a normal terminal and an M2M terminal), three types of paging messages are defined (eg, paging message type 1, paging message type 2, paging message type 3).
  • the access network node can page the M2M terminal by using the new paging message type.
  • the second paging information before the channel coding of the present invention is generated according to the new paging message type.
  • the Information elements listed in Table 4 are the cells included in the message sub-block, the Type/Reference column is the type of the cell contained in the message sub-block, and the Presence column is the appearance of the cells contained in the message sub-block, Format Listed as the format of the cells contained in the message sub-block, the Length column is the length of the cells contained in the message sub-block.
  • the type of the cell is Protocol Discriminator, and the appearance of the cell is mandatory (English: Mandatory, M: abbreviation).
  • the format of the cell is a value.
  • the length of the cell is 1/2 byte; when the cell is Skip Indicator, the type of the cell is Skip Indicator, the appearance of the cell is M, the letter The format of the element is V, the length of the cell is 1/2 byte; when the cell is Paging Request Type 4Message Type, the type of the cell is Message Type, and the appearance of the cell is M.
  • the format of the cell is V, the length of the cell is 1 byte; when the cell is Mobile Identity, the type of the cell is TMSI or P-TMSI, and the appearance of the cell is M, the format of the cell is V, the cell The length is 4 bytes, and the Mobile Identity is the identifier of the terminal according to the present invention.
  • the length L2 of the message sub-block can be determined to be 6 bytes (48 bits) according to the length of the cell contained in the message sub-block.
  • the value of N may be calculated according to a preset length L1 of the second paging message before channel coding, a length L2 of the message sub-block, and a repetition parameter. Specifically, when the message is equal to the number of repeated parameters, When the total length of the block is less than or equal to L1, N is equal to the repeating parameter. Or, when the total length of the message sub-blocks equal to the number of repetition parameters is greater than L1, N is less than or equal to Of course, N can also be less than or equal to The present invention does not limit the specific calculation manner of the N, and may select a specific calculation manner according to different actual application scenarios. among them, Indicates rounding down, Indicates rounding up.
  • the length of the message sub-block is 48 bits
  • the length of the second paging message before the preset channel coding is 184 bits
  • the repetition parameter is 4, because the total length of the message sub-blocks with the same number of repetition parameters is 192 bits, which is greater than the length of the second paging message by 184 bits.
  • the value of the number N of repetitions of the message sub-block is greater than 1, and is less than or equal to 3, that is, the number of times the message sub-block is repeated N is 2 or 3;
  • the length of the message sub-block is 48 bits
  • the length of the second paging message before the channel coding is preset is 184 bits
  • the repetition parameter is 3, because the total length of the message sub-blocks with the same number of repetition parameters is 144 bits, which is smaller than the length of the second paging message 184 bits, so the number N of repetitions of the message sub-block is equal to 3.
  • the value of the length L1 of the second paging message before the channel coding is performed may be selected according to the protocol.
  • the specific value of L1 is not limited in the embodiment of the present invention.
  • the access network node After the access network node calculates the number N of message sub-blocks included in the second paging message according to the repetition parameter and the length L1 of the second paging message before the channel coding is performed, in an application scenario.
  • the access network node may perform N message sub-blocks in the air interface layer 3 by repeating the message sub-block N times, and then perform channel coding on the N message sub-blocks in the layer 1 of the air interface to generate a second paging message.
  • the second paging message may also include layer 2 pseudo-length (English: Layer 2 Pseudo Length, L2 Pseudo Length) cell, which is used to inform the terminal that the Global System for Mobile communication phase 1, (GSM phase 1)
  • the length of the second paging message parsed by the protocol.
  • the value of the type of the second paging message may be 00100101.
  • the normal terminal may decode the second paging message according to the length indicated by the L2 Pseudo Length.
  • the second paging message is discarded; after receiving the second paging message, the M2M terminal can ignore the L2 Pseudo Length and directly decode the second paging message.
  • the access network node repeats the message sub-block N times at the layer 3 of the air interface to obtain N message sub-blocks, and transmits the N message sub-blocks through the layer 2 of the air interface to the layer 1 of the air interface, the layer 1 in the air interface Channel coding the N message sub-blocks to generate a second paging message.
  • the following is an example in which the access network node repeats the message sub-block 3 times at the layer 3 of the air interface, and illustrates a process in which the access network node generates a second paging message according to the repetition parameter and the message sub-block.
  • the access network node repeats the message sub-block 3 times in the layer 3 of the air interface to obtain 3 message sub-blocks (that is, obtains the second paging message before the channel coding generated according to the new paging message type,
  • the content of the second paging message before channel coding is as shown in Table 5, and the obtained three message sub-blocks are transmitted to layer 2 of the air interface, and the layer 2 of the air interface is based on LapdM (dM channel link access protocol) And packing the three message sub-blocks into a 23-byte data packet, and transmitting the data packet to layer 1 of the air interface, so that layer 1 of the air interface performs channel coding on the data packet, thereby generating a second paging.
  • Message the message sub-block 3 times in the layer 3 of the air interface to obtain 3 message sub-blocks (that is, obtains the second paging message before the channel coding generated according to the new paging message type,
  • the content of the second paging message before channel coding is
  • the process of channel coding the data packet in layer 1 of the air interface is as shown in FIG. 5.
  • the specific channel coding process is: 23 bytes of data packets transmitted by layer 2 of the air interface at layer 1 of the air interface. (d(0), d(1)...d(183)), in order to ensure the reliability of data transmission, first add 40bit check digits, then add 4bit tail bits to form a 228bit sequence, then 228bit The sequence performs 1/2 convolutional coding to obtain a 456-bit sequence.
  • the 456-bit sequence needs to be interleaved, and then The interleaved 456bit sequence is mapped on the burst, then encrypted, modulated, and processed. Into the second paging message.
  • the access network node can send a message at layer 1 of the air interface.
  • the sub-block is repeated N times to obtain N message sub-blocks, and then the N message sub-blocks are channel-encoded to generate a second paging message.
  • the following is an example in which the access network node repeats the message sub-block 3 times in the layer 1 of the air interface, and illustrates the process in which the access network node generates the second paging message according to the repeated parameters.
  • the process of channel coding of the N message sub-blocks in layer 1 of the air interface is as shown in FIG. 6.
  • the specific channel coding process is: a message sub-block of length 48 bits in layer 1 of the access network node at the air interface.
  • the message sub-block is repeated N times to obtain N message sub-blocks, at the layer 1 of the access network node at the air interface, according to the repetition parameter and the preset length L1 of the second paging message before channel coding.
  • the access network node first determines the message sub-block at the layer 3 of the air interface (ie, obtains the second paging message before the channel coding generated according to the new paging message type, and the second paging message before the channel coding is included The content is as shown in Table 6), and then the message sub-block is transmitted to the layer 2 of the air interface, and the layer 2 of the air interface receives the message sub-block and does not perform any processing, and directly transmits the message sub-block to the layer 1 of the air interface. So that layer 1 of the air interface repeats and channel codes the message sub-block to generate a second paging message.
  • the access network node sends the second paging message to the terminal at least once, so that the number of all repeatedly transmitted message sub-blocks is greater than or equal to the repeating parameter.
  • the message sub-block is generated, and then the second paging message is further generated according to the repeated parameter and the generated message sub-block. And sending the second paging message to the terminal. If the number N of message sub-blocks included in the second paging message is equal to the repetition parameter, the access network node sends a second paging message to the terminal, if the number of the message sub-blocks included in the second paging message N is smaller than the repetition parameter, and the access network node repeatedly sends the second paging message at least twice to the terminal.
  • the access network node may determine the number N of message sub-blocks included in the second paging message according to the repetition parameter and the preset length L1 of the second paging message before channel coding.
  • N is less than the repeating parameter
  • the access network node may perform S303 only once, and then repeatedly perform S304 until all the number of message sub-blocks included in all the second paging messages sent are greater than or equal to the repeating parameter, of course, Network access
  • the node may also repeatedly perform S303 and S304 until the number of all message sub-blocks included in all the second paging messages sent is greater than or equal to the repetition parameter.
  • the access network node can determine the number of message sub-blocks included in the second paging message.
  • N is 2 or 3.
  • the access network node may first generate a second paging message according to the N and the message sub-block, and then repeatedly send the second paging message, for example, when the access network node determines the second paging.
  • the access network node may repeatedly send in order to achieve the purpose that all the number of message sub-blocks included in all the second paging messages sent are greater than or equal to the repeated parameters.
  • the access network node may also repeatedly generate a second paging message, and send the generated second paging message to the terminal, where the message sub-block included in the second paging message generated by the access network node each time
  • the number of the message sub-blocks included in the second paging message generated each time may be set according to the requirements of the actual application scenario, for example, the repetition parameter is 10, and the access network may be different.
  • the node determines that the number N of the message sub-blocks included in the second paging message is 3, and the purpose of implementing the number of all the message sub-blocks included in all the second paging messages that are sent is greater than or equal to the repetition parameter.
  • the network access node may repeatedly generate the second paging message four times, wherein the second paging message generated by the access network node for the first time may include three message sub-blocks, and the second and third generations of the second homing
  • the message message may include two message sub-blocks, and the second page message generated in the fourth time may include three message sub-blocks.
  • the terminal when the terminal listens to the second paging message sent by the access network node, the terminal calculates the paging group to which it belongs according to the last 3 bits of the IMSI and the configuration of the paging channel, and then The second paging message sent by the access network node is monitored on the paging subchannel corresponding to the call group, and the second paging message sent on the other paging subchannel is not monitored. After receiving the second paging message sent by the access network node, the terminal performs joint decoding according to the message sub-block included in the second paging message, and then determines, according to the decoded message sub-block, that the second paging message is included.
  • the identifier of the terminal is the same as the identifier of the terminal, if the same, sends a paging response message to the access network node, so as to establish a service connection with the access network node; if not, the terminal does not A paging response message is sent to the access network node.
  • the paging method provided by the embodiment of the present invention may determine, after the access network node receives the first paging message sent by the core network node, whether the paged terminal is an M2M terminal according to the first paging message, and determine the homing
  • a message sub-block is generated, and according to the repetition parameter and the generated message sub-block, a message sub-block containing N (N is a positive integer greater than 1 and less than or equal to the repeating parameter) is further generated.
  • N is a positive integer greater than 1 and less than or equal to the repeating parameter
  • the second paging message sent by the access network node to the terminal includes N message sub-blocks, that is, the single second paging message sent by the access network node to the terminal carries multiple paging messages,
  • the coverage enhancement effect achieved is the same as the coverage enhancement achieved by the paging message that the access network node repeatedly transmits to the terminal multiple times.
  • the embodiment provided by the embodiment of the present invention reduces the repeated transmission of paging to the terminal. The number of messages, which shortens the length of the paging connection.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used.
  • the combination may be integrated into another device, or some features may be ignored or not performed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may be one physical unit or multiple physical units. It can be located in one place, or it can be distributed to many different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a readable storage medium. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a device (which may be a microcontroller, chip, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read only memory (English: Read-Only Memory, abbreviated as: ROM), a random access memory (English: Random Access Memory, abbreviated as: RAM), a magnetic disk or an optical disk, and the like.
  • ROM Read-Only Memory
  • RAM Random Access Memory

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Abstract

本发明实施例提供一种接入网节点及寻呼方法，涉及通信领域，解决了接入网节点向M2M终端重复发送寻呼消息导致的寻呼接续时间长的问题。具体的方案为：通信接口接收核心网节点发送的第一寻呼消息；当处理器根据通信接口接收到的第一寻呼消息确定终端为M2M终端时，生成消息子块，并根据重复参数和消息子块，进一步生成第二寻呼消息，消息子块包括终端的标识，重复参数用于指示重复发送消息子块的总个数，第二寻呼消息中包含N个消息子块，N为大于1的正整数，且N小于或等于重复参数；发射器向终端发送至少一次第二寻呼消息，以使得所有重复发送的消息子块的个数大于或等于重复参数。本发明用于寻呼的过程中。

Description

一种接入网节点及寻呼方法 技术领域
本发明涉及通信领域，尤其涉及一种接入网节点及寻呼方法。
背景技术
目前，机器到机器(英文：Machine To Machine，简称：M2M)终端已被广泛应用于智能电力、智能交通、智能家居等领域，例如，在智能电力领域中，可以通过M2M终端实现远程抄表业务。众所周知，当M2M终端处于待命(Standby)状态时，若网络侧需要向该M2M终端发送分组数据，首先需向该M2M终端发送寻呼消息，并根据终端反馈的寻呼响应消息获知该M2M终端所处小区的信息，然后根据该M2M终端所处小区的信息，与该M2M终端建立业务连接，此时便可以通过建立的业务连接向该M2M终端发送分组数据。由于M2M终端通常被部署在地下室等密闭的空间内，网络侧为了能够成功寻呼到M2M终端，需在向该M2M终端发送寻呼消息时采用覆盖增强技术。
在现有的覆盖增强技术中，接入网节点可以通过向M2M终端重复发送多次寻呼消息以便能够成功寻呼到该M2M终端。例如，接入网节点向M2M终端重复发送两次寻呼消息，便可以成功寻呼到该M2M终端，此时，接入网节点向该M2M终端重复发送寻呼消息的具体过程为：接入网节点在接收到核心网节点发送的寻呼消息后，首先根据M2M终端的国际移动用户识别码(英文：International Mobile Subscriber Identity，简称：IMSI)，计算用于发送寻呼消息的寻呼子信道，然后在该寻呼子信道上向该M2M终端第一次发送寻呼消息，为了能够减少M2M终端的功率消耗并保障其它终端也可以被寻呼到，接入网节点需等待一个寻呼周期后，才可以在该寻呼子信道上向该M2M终端第二次发送寻呼消息。
现有技术中至少存在如下问题：在需要多个寻呼消息才能够成 功寻呼到M2M终端的情况下，接入网节点需经过多个寻呼周期才能够将所有的寻呼消息发送给M2M终端，导致寻呼接续时间变长。
发明内容
本发明提供一种接入网节点及寻呼方法，解决了接入网节点向M2M终端重复发送寻呼消息导致的寻呼接续时间长的问题。
为达到上述目的，本发明采用如下技术方案：
本发明第一方面，提供一种接入网节点，包括：通信接口、处理器、发射器；
所述通信接口，用于接收核心网节点发送的第一寻呼消息；所述第一寻呼消息用于寻呼终端；
所述处理器，用于当根据所述通信接口接收到的所述第一寻呼消息确定所述终端为机器对机器M2M终端时，生成消息子块，所述消息子块包括所述终端的标识，并根据重复参数和所述消息子块，生成第二寻呼消息，所述重复参数用于指示重复发送所述消息子块的总个数，所述第二寻呼消息中包含N个所述消息子块，所述N为大于1的正整数，且所述N小于或等于所述重复参数；
所述发射器，用于向所述终端发送至少一次所述第二寻呼消息，以使得所有重复发送的所述消息子块的个数大于或等于所述重复参数。
结合本发明的第一方面，在第一种可能的实现方式中，所述接入网节点还包括：存储器；所述重复参数预先存储在所述存储器中；所述处理器，还用于读取预先存储在所述存储器中的所述重复参数。
结合本发明的第一方面，在第二种可能的实现方式中，所述第一寻呼消息包含所述终端的覆盖等级；
所述处理器，还用于根据所述终端的覆盖等级确定寻呼所述终端时覆盖的增强等级，并根据所述覆盖的增强等级确定所述重复参数。
结合本发明的第一方面，在第三种可能的实现方式中，所述第 一寻呼消息包含所述终端的国际移动用户识别码IMSI；
所述处理器，还用于根据所述终端的IMSI和预先存储的映射关系表，获取所述终端的覆盖等级；所述映射关系表中包含所述IMSI，以及与所述IMSI对应的所述终端的覆盖等级；根据所述终端的覆盖等级确定寻呼所述终端时覆盖的增强等级，并根据所述覆盖的增强等级确定所述重复参数。
结合本发明的第一方面至第一方面的第三种可能的实现方式任一种，在第四种可能的实现方式中，所述处理器，具体用于根据所述重复参数和预设的进行信道编码前的第二寻呼消息的长度L1，将所述消息子块重复N次得到N个所述消息子块，并对N个所述消息子块进行信道编码生成所述第二寻呼消息。
结合本发明第一方面的第四种可能的实现方式，在第五种可能的实现方式中，
当与所述重复参数相等个数的消息子块的总长度小于或等于所述L1时，所述N等于所述重复参数；
当与所述重复参数相等个数的消息子块的总长度大于所述L1时，所述N小于或等于
Figure PCTCN2014087264-appb-000001
所述
Figure PCTCN2014087264-appb-000002
表示向下取整，所述L2为所述消息子块的长度。
结合本发明的第一方面至第一方面的第四种可能的实现方式，在第六种可能的实现方式中，所述发射器，具体用于当所述N等于所述重复参数时，向所述终端发送一次所述第二寻呼消息；当所述N小于所述重复参数时，向所述终端重复发送至少两次所述第二寻呼消息。
本发明的第二方面，提供一种寻呼方法，包括：
接入网节点接收核心网节点发送的第一寻呼消息；所述第一寻呼消息用于寻呼终端；
当所述接入网节点根据所述第一寻呼消息确定所述终端为机器对机器M2M终端时，所述接入网节点生成消息子块，所述消息子块包括所述终端的标识；
所述接入网节点根据重复参数和所述消息子块，生成第二寻呼消息，所述重复参数用于指示重复发送所述消息子块的总个数，所述第二寻呼消息中包含N个所述消息子块，所述N为大于1的正整数，且所述N小于或等于所述重复参数；
所述接入网节点向所述终端发送至少一次所述第二寻呼消息，以使得所有重复发送的所述消息子块的个数大于或等于所述重复参数。
结合本发明的第二方面，在第一种可能的实现方式中，所述重复参数预先存储在所述接入网节点中；
在所述接入网节点根据重复参数和所述消息子块，生成第二寻呼消息之前，还包括：
所述接入网节点读取预先存储在所述接入网节点中的所述重复参数。
结合本发明的第二方面，在第二种可能的实现方式中，所述第一寻呼消息包含所述终端的覆盖等级；
在所述接入网节点根据重复参数和所述消息子块，生成第二寻呼消息之前，还包括：
所述接入网节点根据所述终端的覆盖等级确定寻呼所述终端时覆盖的增强等级，并根据所述覆盖的增强等级确定所述重复参数。
结合本发明的第二方面，在第三种可能的实现方式中，所述第一寻呼消息包含所述终端的国际移动用户识别码IMSI；
在所述接入网节点根据重复参数和所述消息子块，生成第二寻呼消息之前，还包括：
所述接入网节点根据所述终端的IMSI和预先存储的映射关系表，获取所述终端的覆盖等级；所述映射关系表中包含所述IMSI，以及与所述IMSI对应的所述终端的覆盖等级；
所述接入网节点根据所述终端的覆盖等级确定寻呼所述终端时覆盖的增强等级，并根据所述覆盖的增强等级确定所述重复参数。
结合本发明的第二方面至第二方面的第三种可能的实现方式， 在第四种可能的实现方式中，所述接入网节点根据重复参数和所述消息子块，生成第二寻呼消息，包括：
所述接入网节点根据所述重复参数和预设的进行信道编码前的第二寻呼消息的长度L1，将所述消息子块重复N次得到N个所述消息子块；
所述接入网节点对N个所述消息子块进行信道编码生成所述第二寻呼消息。
结合本发明第二方面的第四种可能的实现方式，在第五种可能的实现方式中，
当与所述重复参数相等个数的消息子块的总长度小于或等于所述L1时，所述N等于所述重复参数；
当与所述重复参数相等个数的消息子块的总长度大于所述L1时，所述N小于或等于
Figure PCTCN2014087264-appb-000003
所述
Figure PCTCN2014087264-appb-000004
表示向下取整，所述L2为所述消息子块的长度。
结合本发明的第二方面至第二方面的第四种可能的实现方式，在第六种可能的实现方式中，所述接入网节点向所述终端发送至少一次所述第二寻呼消息，包括：
当所述N等于所述重复参数时，所述接入网节点向所述终端发送一次所述第二寻呼消息；
当所述N小于所述重复参数时，所述接入网节点向所述终端重复发送至少两次所述第二寻呼消息。
本发明实施例提供的接入网节点及寻呼方法，在接入网节点接收到核心网节点发送的第一寻呼消息之后，可以根据第一寻呼消息确定寻呼的终端是否为M2M终端，并在确定寻呼的终端为M2M终端之后，生成消息子块，并根据重复参数和生成的消息子块，生成包含N(N为大于1的正整数，且小于或等于重复参数)个消息子块的第二寻呼消息，然后向终端发送至少一次第二寻呼消息。由于接入网节点发送给终端的第二寻呼消息中包含了N个消息子块，也就是说，接入网节点向终端发送的单个第二寻呼消息承载了多个寻 呼消息的寻呼信息，其达到的覆盖增强的效果与现有技术接入网节点向终端重复发送多次的寻呼消息达到的覆盖增强的效果相同，但是，本发明实施例提供的实施方式减少了向终端重复发送寻呼消息的次数，从而缩短了寻呼接续时长。
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性的前提下，还可以根据这些附图获得其他的附图。
图1为本发明一实施例提供的一种接入网节点的组成示意图；
图2为本发明一实施例提供的另一种接入网节点的组成示意图；
图3为本发明另一实施例提供的一种寻呼方法流程图；
图4为本发明另一实施例提供的一种寻呼方法流程图；
图5为本发明另一实施例提供的一种信道编码示意图；
图6为本发明另一实施例提供的另一种信道编码示意图。
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。
另外，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
本发明一实施例提供一种接入网节点，如图1所示，该接入网 节点可以包括：通信接口11、处理器12、发射器13。
通信接口11，用于接收核心网节点发送的第一寻呼消息；第一寻呼消息用于寻呼终端。
处理器12，用于当根据通信接口11接收到的第一寻呼消息确定终端为M2M终端时，生成消息子块，并根据重复参数和消息子块，生成第二寻呼消息。
其中，消息子块包括终端的标识，重复参数用于指示重复发送消息子块的总个数，第二寻呼消息中包含N个消息子块，N为大于1的正整数，且N小于或等于重复参数。
发射器13，用于向终端发送至少一次第二寻呼消息，以使得所有重复发送的消息子块的个数大于或等于重复参数。
进一步的，如图2所示，接入网节点还包括：存储器14，重复参数预先存储在存储器14中。
处理器12，还用于读取预先存储在存储器14中的重复参数。
进一步的，第一寻呼消息包含终端的覆盖等级。
处理器12，还用于根据终端的覆盖等级确定寻呼终端时覆盖的增强等级，并根据覆盖的增强等级确定重复参数。
进一步的，第一寻呼消息包含终端的IMSI。
处理器12，还用于根据终端的IMSI和预先存储的映射关系表，获取终端的覆盖等级；映射关系表中包含IMSI，以及与IMSI对应的终端的覆盖等级；根据终端的覆盖等级确定寻呼终端时覆盖的增强等级，并根据覆盖的增强等级确定重复参数。
进一步的，处理器12，具体用于根据重复参数和预设的进行信道编码前的第二寻呼消息的长度L1，将消息子块重复N次得到N个消息子块，并对N个消息子块进行信道编码生成第二寻呼消息。
进一步的，当与重复参数相等个数的消息子块的总长度小于或等于L1时，N等于重复参数。
当与重复参数相等个数的消息子块的总长度大于L1时，N小于或等于
Figure PCTCN2014087264-appb-000005
其中，
Figure PCTCN2014087264-appb-000006
表示向下取整，L2为消息子块的长度。
需要说明的是，在与重复参数相同个数的消息子块的总长度大于L1的情况下，N的取值可以根据
Figure PCTCN2014087264-appb-000007
计算得到，当然，也可以根据
Figure PCTCN2014087264-appb-000008
计算得到，其中，
Figure PCTCN2014087264-appb-000009
表示向上取整。本发明实施例在此对该情况下N的具体计算方式不做限制，可以根据实际应用场景的不同，选择具体的计算方式。
进一步的，发射器13，具体用于当N等于重复参数时，向终端发送一次第二寻呼消息；当N小于重复参数时，向终端重复发送至少两次第二寻呼消息。
需要说明的是，本发明实施例提供的接入网节点中各功能模块的具体描述可以参考方法实施例中对应内容的具体描述，本发明实施例在此不再详细赘述。
本发明实施例提供的接入网节点，在接收到核心网节点发送的第一寻呼消息之后，可以根据第一寻呼消息确定寻呼的终端是否为M2M终端，并在确定寻呼的终端为M2M终端之后，生成消息子块，并根据重复参数和生成的消息子块，进一步生成包含N(N为大于1的正整数，且小于或等于重复参数)个消息子块的第二寻呼消息，然后向终端发送至少一次第二寻呼消息。由于接入网节点向终端发送的第二寻呼消息中包含了N个消息子块，也就是说，接入网节点向终端发送的单个第二寻呼消息承载了多个寻呼消息，其达到的覆盖增强的效果与现有技术接入网节点向终端重复发送多次的寻呼消息达到的覆盖增强的效果相同，但是，本发明实施例提供的实施方式减少了向终端重复发送寻呼消息的次数，从而缩短了寻呼接续时长。
本发明另一实施例提供一种寻呼方法，如图3所示，该方法可以包括：
S201、接入网节点接收核心网节点发送的第一寻呼消息。
其中，第一寻呼消息用于寻呼终端。当终端与网络侧之间没有分组数据需要传输，且没有分组数据传输的时间超过T3314定时器规定的时间时，终端便会由就绪(Ready)状态进入Standby状态。 在终端进入Standby状态后，若网络侧需要向该终端发送分组数据，必须先寻呼该终端，以便与该终端建立联系，进而向该终端发送分组数据。寻呼终端的流程由核心网节点触发，即核心网节点可以向接入网节点发送用于寻呼终端的第一寻呼消息，此时，接入网节点便可以接收到核心网节点发送的第一寻呼消息。
S202、当接入网节点根据第一寻呼消息确定终端为M2M终端时，接入网节点生成消息子块。
其中，消息子块包括终端的标识。
S203、接入网节点根据重复参数和消息子块，生成第二寻呼消息。
其中，重复参数用于指示重复发送消息子块的总个数，第二寻呼消息中包含N个消息子块，N为大于1的正整数，且N小于或等于重复参数。在接入网节点接收到核心网节点发送的第一寻呼消息之后，可以根据第一寻呼消息确定寻呼的终端是否为M2M终端，并在确定寻呼的终端为M2M终端之后，生成消息子块，并根据重复参数和生成的消息子块，进一步生成包含N个消息子块的第二寻呼消息。
S204、接入网节点向终端发送至少一次第二寻呼消息，以使得所有重复发送的消息子块的个数大于或等于重复参数。
其中，由于空口寻呼信道资源有限，接入网节点在向终端发送第二寻呼消息时，可以根据寻呼的终端的IMSI的最后3位以及寻呼信道的配置情况计算用于发送第二寻呼消息的寻呼子信道，然后在该寻呼子信道上向终端发送至少一次第二寻呼消息。
本发明实施例提供的寻呼方法，在接入网节点接收到核心网节点发送的第一寻呼消息之后，可以根据第一寻呼消息确定寻呼的终端是否为M2M终端，并在确定寻呼的终端为M2M终端之后，生成消息子块，并根据重复参数和生成的消息子块，进一步生成包含N(N为大于1的正整数，且小于或等于重复参数)个消息子块的第二寻呼消息，然后向终端发送至少一次第二寻呼消息。由于接入网 节点向终端发送的第二寻呼消息中包含了N个消息子块，也就是说，接入网节点向终端发送的单个第二寻呼消息承载了多个寻呼消息，其达到的覆盖增强的效果与现有技术接入网节点向终端重复发送多次的寻呼消息达到的覆盖增强的效果相同，但是，本发明实施例提供的实施方式减少了向终端重复发送寻呼消息的次数，从而缩短了寻呼接续时长。
本发明另一实施例提供一种寻呼方法，如图4所示，该方法可以包括：
S301、接入网节点接收核心网节点发送的第一寻呼消息。
其中，第一寻呼消息用于寻呼终端。寻呼终端的流程可以由核心网节点触发，具体描述可以参考本发明另一实施例中S201中的具体描述，本发明实施例在此不再赘述。
S302、当接入网节点根据第一寻呼消息确定终端为M2M终端时，接入网节点生成消息子块。
示例性的，在一种可能的实现方式中，第一寻呼消息中可以包含用于确定终端的类型的终端信息，在接入网节点接收到核心网节点发送的第一寻呼消息之后，可以直接根据第一寻呼消息中包含的终端信息确定寻呼的终端的类型。
在另一种可能的实现方式中，第一寻呼消息中可以包含终端的IMSI，在接入网节点接收到核心网节点发送的第一寻呼消息之后，可以根据该终端的IMSI，查询预先存储的对应表，从而确定出寻呼的终端的类型。该对应表中包含终端的IMSI，以及与终端的IMSI对应的终端的类型。
S303、接入网节点获取重复参数。
其中，接入网节点获取重复参数的过程可以为以下方式中的任一种方式：
方式一：接入网节点读取预先存储在接入网节点中的重复参数。
其中，重复参数预先存储在接入网节点中，当接入网节点根据第一寻呼消息确定寻呼的终端为M2M终端时，可以直接读取存储 的重复参数。
方式二：接入网节点根据终端的覆盖等级确定寻呼终端时覆盖的增强等级，并根据确定出的覆盖的增强等级确定重复参数。
其中，在S301中，接入网节点接收到的第一寻呼消息中包含终端的覆盖等级，此时，接入网节点可以根据第一寻呼消息中包含的终端的覆盖等级确定寻呼终端时覆盖的增强等级，并根据确定出的覆盖的增强等级确定重复参数，
示例性的，终端的覆盖等级与接入网节点寻呼终端时覆盖的增强等级的对应关系如表1所示，接入网节点寻呼终端时覆盖的增强等级与重复参数的对应关系如表2所示。在接入网节点根据接收到的第一寻呼消息，确定寻呼的终端为M2M终端之后，可以根据第一寻呼消息中包含的终端的覆盖等级，查询表1，确定在寻呼终端时覆盖的增强等级，然后根据确定出的覆盖的增强等级，查询表2，确定重复参数。
表1
终端的覆盖等级 接入网节点的覆盖的增强等级
10dB 1级
20dB 2级
... ...
ndB n级
表2
Figure PCTCN2014087264-appb-000010
方式三：接入网节点根据终端的IMSI和预先存储的映射关系表，获取终端的覆盖等级，并根据获取到的终端的覆盖等级确定寻呼终端时覆盖的增强等级，进而根据确定出的覆盖的增强等级确定重复参数。
其中，映射关系表中包含IMSI，以及与IMSI对应的终端的覆盖等级，在S301中，接入网节点接收到的第一寻呼消息中包含终端的IMSI，此时，接入网节点可以根据第一寻呼消息中包含的终端的IMSI和和预先存储的映射关系表，获取终端的覆盖等级，并根据获取到的终端的覆盖等级确定寻呼终端时覆盖的增强等级，进而根据确定出的覆盖的增强等级确定重复参数，该映射关系表的组成方式可以如表3所示。
表3
IMSI 终端的覆盖等级
IMSI 1 10dB
IMSI 2 20dB
... ...
IMSI n 20dB
在接入网节点根据接收到的第一寻呼消息，确定寻呼的终端为M2M终端之后，可以根据第一寻呼消息中包含的终端的IMSI，查询表3，确定与终端的IMSI对应的终端的覆盖等级，然后根据确定出的终端的覆盖等级，查询表1，确定寻呼终端时覆盖的增强等级，进一步根据确定出的覆盖的增强等级，查询表2，确定重复参数。
需要说明的是，以上描述的接入网节点获取重复参数的方式只是一种示例，接入网节点也可以通过其他方式获取重复参数，本发明实施例在此对接入网节点获取重复参数的方式不做限制，可以根据实际应用场景的不同选择相应的获取方式。
在接入网节点获取到重复参数之后，接入网节点可以根据重复参数和消息子块，生成第二寻呼消息，具体的，接入网节点根据重复参数和消息子块，生成第二寻呼消息的过程可以为S304：
S304、接入网节点根据重复参数和预设的进行信道编码前的第二寻呼消息的长度L1，将消息子块重复N次得到N个消息子块，并对N个消息子块进行信道编码生成第二寻呼消息。
其中，第二寻呼消息中包含N个消息子块，N为大于1的正整数，且N小于或等于重复参数，该消息子块包括终端的标识，该标识可以为IMSI，也可以为临时移动用户身份标识(英文：Temporary Mobile Subscriber Identity，简称：TMSI)，还可以为分组临时移动用户身份标识(英文：Packet Temporary Mobile Subscriber Identity，简称：P-TMSI)。与TMSI或者P-TMSI的长度相比，IMSI的长度较长，这样，当消息子块包括的终端的标识为TMSI或者P-TMSI时，接入网节点生成的进行信道编码前的第二寻呼消息中包含的消息子块的个数比当消息子块包括的终端的标识为IMSI时，接入网节点生成的进行信道编码前的第二寻呼消息中包含的消息子块的个数多，因此，优选的，消息子块包括的终端的标识为TMSI或者P-TMSI。
为了能够与现有的寻呼消息兼容，进一步的，该消息子块中还可以包括无线资源管理协议鉴别器(英文：Radio Resources Management Protocol Discriminator，简称：RR Management Protocol Discriminator)、Skip Indicator(跳跃指示)和Paging Request Type4 Message Type(寻呼请求类型4消息类型)，示例性的，该消息子块包含的内容可以如表4所示，其中，Paging Request Type 4Message Type用于表示本发明定义的新的寻呼消息类型。众所周知，在现有技术中针对终端(所述的终端包括普通终端和M2M终端)，定义了三种寻呼消息类型(如：寻呼消息类型1、寻呼消息类型2、寻呼消息类型3)，为了能够缩短寻呼M2M终端的接续时长，在寻呼M2M终端时，接入网节点可以采用该新的寻呼消息类型对该M2M终端进行寻呼。其中，本发明进行信道编码前的第二寻呼信息是根据该新的寻呼消息类型生成的。
表4
Figure PCTCN2014087264-appb-000011
其中，表4中的Information elements列为消息子块中包含的信元，Type/Reference列为消息子块中包含的信元的类型，Presence列为消息子块中包含的信元的出现，Format列为消息子块中包含的信元的格式，Length列为消息子块中包含的信元的长度。当信元为RR Management Protocol Discriminator时，该信元的类型为Protocol Discriminator(协议鉴别器)，该信元的出现是必选的(英文：Mandatory，简称：M)，该信元的格式为值(英文：Value，简称：V)，该信元的长度为1/2个字节；当信元为Skip Indicator时，该信元的类型为Skip Indicator，该信元的出现是M，该信元的格式为V，该信元的长度为1/2个字节；当信元为Paging Request Type 4Message Type时，该信元的类型为Message Type(消息类型)，该信元的出现是M，该信元的格式为V，该信元的长度为1个字节；当信元为Mobile Identity(移动标识)时，该信元的类型为TMSI或者P-TMSI，该信元的出现是M，该信元的格式为V，该信元的 长度为4个字节，其中，Mobile Identity即为本发明所述的终端的标识。从表4可以看出，根据该消息子块中包含的信元的长度可以确定出该消息子块的长度L2为6个字节(48bit(比特))。
其中，N的取值可以根据预设的进行信道编码前的第二寻呼消息的长度L1、消息子块的长度L2以及重复参数计算得到，具体的，当与重复参数相等个数的消息子块的总长度小于或等于L1时，N等于重复参数。或者，当与重复参数相等个数的消息子块的总长度大于L1时，N小于或等于
Figure PCTCN2014087264-appb-000012
当然，N也可以小于或等于
Figure PCTCN2014087264-appb-000013
本发明在此对N的具体的计算方式不做限制，可以根据实际应用场景的不同，选择具体的计算方式。其中，
Figure PCTCN2014087264-appb-000014
表示向下取整，
Figure PCTCN2014087264-appb-000015
表示向上取整。
例如，当消息子块的长度为48bit，预设的进行信道编码前的第二寻呼消息的长度为184bit，重复参数为4时，由于与重复参数相同个数的消息子块的总长度为192bit，大于第二寻呼消息的长度184bit，因此消息子块重复的次数N的取值为大于1，且小于或等于3，也就是说，消息子块重复的次数N的取值为2或者3；当消息子块的长度为48bit，预设的进行信道编码前的第二寻呼消息的长度为184bit，重复参数为3时，由于与重复参数相同个数的消息子块的总长度为144bit，小于第二寻呼消息的长度184bit，因此消息子块重复的次数N的取值等于3。
需要说明的是，预设的进行信道编码前的第二寻呼消息的长度L1的取值可以根据协议的规定选取相应的数值，本发明实施例在此对L1的具体取值不做限制。
在接入网节点根据重复参数和预设的进行信道编码前的第二寻呼消息的长度L1，计算出第二寻呼消息中包含的消息子块的个数N之后，在一种应用场景下，接入网节点可以在空口的层3，将消息子块重复N次得到N个消息子块，然后在空口的层1对N个消息子块进行信道编码生成第二寻呼消息。
为了前向兼容，进一步的，第二寻呼消息还可以包含层2伪长 度(英文：Layer 2 Pseudo Length，简称：L2 Pseudo Length)信元，该信元用于通知终端可以用全球移动通信系统分组1(英文：Global System for Mobile communication phase 1，简称：GSM phase 1)协议解析的第二寻呼消息的长度。示例性的，第二寻呼消息的类型的取值可以为00100101，当普通终端接收到第二寻呼消息后，可以根据L2 Pseudo Length指示的长度对第二寻呼消息进行解码，当解码出的消息的类型的取值为为00100101时，丢弃该第二寻呼消息；当M2M终端接收到第二寻呼消息后，可以忽略L2 Pseudo Length，直接对第二寻呼消息进行解码。
在接入网节点在空口的层3将消息子块重复N次得到N个消息子块，并将该N个消息子块通过空口的层2传送到空口的层1之后，在空口的层1对N个消息子块进行信道编码生成第二寻呼消息。以下以接入网节点在空口的层3将消息子块重复3次为例，说明接入网节点根据重复参数和消息子块，生成第二寻呼消息的过程。具体的，接入网节点在空口的层3，将消息子块重复3次得到3个消息子块(即得到根据新的寻呼消息类型生成的进行信道编码前的第二寻呼消息，该进行信道编码前的第二寻呼消息包含的内容如表5所示)，并将得到的3个消息子块传送到空口的层2，空口的层2根据LapdM(dM信道链路接入协议)，将该3个消息子块打包成23个字节的数据包，并将该数据包传送到空口的层1，以便空口的层1对该数据包进行信道编码，从而生成第二寻呼消息。示例性的，该数据包在空口的层1进行信道编码的过程如图5所示，具体的信道编码过程为：在空口的层1接收到空口的层2传送的23个字节的数据包(d(0)，d(1)...d(183))之后，为了保证数据传输的可靠性，首先添加40bit的校验位，然后添加4bit的尾比特，形成228bit序列，再对228bit序列进行1/2卷积编码，得到456bit序列，为了克服在456bit序列的传输过程中，因连串误码导致终端无法正确解码的问题，进一步的，还需要对456bit序列进行交织处理，再将交织后的456bit序列映射在突发脉冲上，再经过加密、调制处理，生 成第二寻呼消息。
表5
Figure PCTCN2014087264-appb-000016
在另一种应用场景下，接入网节点可以在空口的层1，将消息 子块重复N次得到N个消息子块，然后对该N个消息子块进行信道编码，生成第二寻呼消息。以下以接入网节点在空口的层1将消息子块重复3次为例，说明接入网节点根据重复参数，生成第二寻呼消息的过程。示例性的，N个消息子块在空口的层1进行信道编码的过程如图6所示，具体的信道编码过程为：在接入网节点在空口的层1将长度为48bit的消息子块重复3次得到长度为144bit序列(d(0)，d(1)...d(144))之后，为了保证数据传输的可靠性，首先对144bit序列添加70bit的校验位，然后添加14bit的尾比特，形成228bit序列，再对228bit序列进行1/2卷积编码，得到456bit序列，为了克服在456bit序列的传输过程中，因连串误码导致终端无法正确解码的问题，进一步的，还需要对456bit序列进行交织处理，再将交织后的456bit序列映射在突发脉冲上，再经过加密、调制处理，生成第二寻呼消息。
进一步的，在接入网节点在空口的层1，根据重复参数和预设的进行信道编码前的第二寻呼消息的长度L1，将消息子块重复N次得到N个消息子块之前，接入网节点首先在空口的层3确定消息子块(即得到根据新的寻呼消息类型生成的进行信道编码前的第二寻呼消息，该进行信道编码前的第二寻呼消息包含的内容如表6所示)，然后将该消息子块传送到空口的层2，空口的层2接收到该消息子块后不做任何处理，直接将该消息子块透传到空口的层1，以便空口的层1对该消息子块进行重复和信道编码，从而生成第二寻呼消息。
表6
Figure PCTCN2014087264-appb-000017
S305、接入网节点向终端发送至少一次第二寻呼消息，以使得所有重复发送的消息子块的个数大于或等于重复参数。
其中，在接入网节点根据接收到的第一寻呼消息确定寻呼的终端为M2M终端后，生成消息子块，然后根据重复参数和生成的消息子块，进一步生成第二寻呼消息，并将该第二寻呼消息发送给终端。若第二寻呼消息中包含的消息子块的个数N等于重复参数，接入网节点便向终端发送一次第二寻呼消息，若第二寻呼消息中包含的消息子块的个数N小于重复参数，接入网节点向终端重复发送至少两次第二寻呼消息。
在本发明实施例中，接入网节点可以根据重复参数和预设的进行信道编码前的第二寻呼消息的长度L1，确定第二寻呼消息中包含的消息子块的个数N，当N小于重复参数时，接入网节点可以只执行一次S303，然后重复执行S304，直到发送的所有第二寻呼消息中包含的所有消息子块的个数大于或等于重复参数，当然，接入网 节点也可以重复执行S303和S304，直到发送的所有第二寻呼消息中包含的所有消息子块的个数大于或等于重复参数。示例性的，若重复参数为10，第二寻呼消息中最多可以包含的消息子块的个数为3，则接入网节点可以确定第二寻呼消息中包含的消息子块的个数N为2或者3，此时，接入网节点可以先根据N和消息子块，生成第二寻呼消息，然后重复发送第二寻呼消息，例如，当接入网节点确定第二寻呼消息中包含的消息子块的个数N为3时，为了实现发送的所有第二寻呼消息中包含的所有消息子块的个数大于或等于重复参数的目的，接入网节点可以重复发送四次第二寻呼消息。当然，接入网节点也可以重复生成第二寻呼消息，并将生成的第二寻呼消息发送给终端，其中，接入网节点每次生成的第二寻呼消息中包含的消息子块的个数可以相同，也可以不相同，具体每次生成的第二寻呼消息中包含的消息子块的个数可以根据实际应用场景的需求进行设置，例如，重复参数为10，接入网节点确定第二寻呼消息中包含的消息子块的个数N为3，且为了实现发送的所有第二寻呼消息中包含的所有消息子块的个数大于或等于重复参数的目的，接入网节点可以重复生成四次第二寻呼消息，其中，接入网节点第一次生成的第二寻呼消息可以包含3个消息子块，第二次、第三次生成的第二寻呼消息中可以分别包含2个消息子块，第四次生成的第二寻呼消息中可以包含3个消息子块。
为了节省终端的功率消耗，终端在监听接入网节点发送的第二寻呼消息时，根据自身IMSI的最后3位以及寻呼信道的配置情况计算自身所属的寻呼组，然后在与该寻呼组对应的寻呼子信道上监听接入网节点发送的第二寻呼消息，而不监听其它寻呼子信道上发送的第二寻呼消息。当终端接收到接入网节点发送的第二寻呼消息之后，根据第二寻呼消息中包含的消息子块进行联合解码，然后根据解出的消息子块判断该第二寻呼消息中包含的终端的标识是否与自身的终端标识相同，若相同，则向接入网节点发送寻呼响应消息，以便与接入网节点之间建立业务连接；若不相同，则终端不会 向接入网节点发送寻呼响应消息。
本发明实施例提供的寻呼方法，在接入网节点接收到核心网节点发送的第一寻呼消息之后，可以根据第一寻呼消息确定寻呼的终端是否为M2M终端，并在确定寻呼的终端为M2M终端之后，生成消息子块，并根据重复参数和生成的消息子块，进一步生成包含N(N为大于1的正整数，且小于或等于重复参数)个消息子块的第二寻呼消息，然后向终端发送至少一次第二寻呼消息。由于接入网节点向终端发送的第二寻呼消息中包含了N个消息子块，也就是说，接入网节点向终端发送的单个第二寻呼消息承载了多个寻呼消息，其达到的覆盖增强的效果与现有技术接入网节点向终端重复发送多次的寻呼消息达到的覆盖增强的效果相同，但是，本发明实施例提供的实施方式减少了向终端重复发送寻呼消息的次数，从而缩短了寻呼接续时长。
通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。上述描述的装置的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述模块或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个装置，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是一个物理单元或多个物理单元， 即可以位于一个地方，或者也可以分布到多个不同地方。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该软件产品存储在一个存储介质中，包括若干指令用以使得一个设备(可以是单片机，芯片等)或处理器(processor)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(英文：Read-Only Memory，简称：ROM)、随机存取存储器(英文：Random Access Memory，简称：RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
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 (14)

  1. 一种接入网节点，其特征在于，包括：通信接口、处理器、发射器；
    所述通信接口，用于接收核心网节点发送的第一寻呼消息，所述第一寻呼消息用于寻呼终端；
    所述处理器，用于当根据所述通信接口接收到的所述第一寻呼消息确定所述终端为机器对机器M2M终端时，生成消息子块，所述消息子块包括所述终端的标识，并根据重复参数和所述消息子块，生成第二寻呼消息，所述重复参数用于指示重复发送所述消息子块的总个数，所述第二寻呼消息中包含N个所述消息子块，所述N为大于1的正整数，且所述N小于或等于所述重复参数；
    所述发射器，用于向所述终端发送至少一次所述第二寻呼消息，以使得所有重复发送的所述消息子块的个数大于或等于所述重复参数。
  2. 根据权利要求1所述的接入网节点，其特征在于，所述接入网节点还包括：存储器；所述重复参数预先存储在所述存储器中；
    所述处理器，还用于读取预先存储在所述存储器中的所述重复参数。
  3. 根据权利要求1所述的接入网节点，其特征在于，所述第一寻呼消息包含所述终端的覆盖等级；
    所述处理器，还用于根据所述终端的覆盖等级确定寻呼所述终端时覆盖的增强等级，并根据所述覆盖的增强等级确定所述重复参数。
  4. 根据权利要求1所述的接入网节点，其特征在于，所述第一寻呼消息包含所述终端的国际移动用户识别码IMSI；
    所述处理器，还用于根据所述终端的IMSI和预先存储的映射关系表，获取所述终端的覆盖等级；所述映射关系表中包含所述IMSI，以及与所述IMSI对应的所述终端的覆盖等级；根据所述终端的覆盖等级确定寻呼所述终端时覆盖的增强等级，并根据所述覆盖的增强等级确定所述重复参数。
  5. 根据权利要求1-4中任一项所述的接入网节点，其特征在于，所述处理器，具体用于根据所述重复参数和预设的进行信道编码前的第二寻呼消息的长度L1，将所述消息子块重复N次得到N个所述消息子块，并对N个所述消息子块进行信道编码生成所述第二寻呼消息。
  6. 根据权利要求5所述的接入网节点，其特征在于，
    当与所述重复参数相等个数的消息子块的总长度小于或等于所述L1时，所述N等于所述重复参数；
    当与所述重复参数相等个数的消息子块的总长度大于所述L1时，所述N小于或等于
    Figure PCTCN2014087264-appb-100001
    所述
    Figure PCTCN2014087264-appb-100002
    表示向下取整，所述L2为所述消息子块的长度。
  7. 根据权利要求1-5中任一项所述的接入网节点，其特征在于，所述发射器，具体用于当所述N等于所述重复参数时，向所述终端发送一次所述第二寻呼消息；当所述N小于所述重复参数时，向所述终端重复发送至少两次所述第二寻呼消息。
  8. 一种寻呼方法，其特征在于，包括：
    接入网节点接收核心网节点发送的第一寻呼消息，所述第一寻呼消息用于寻呼终端；
    当所述接入网节点根据所述第一寻呼消息确定所述终端为机器对机器M2M终端时，所述接入网节点生成消息子块，所述消息子块包括所述终端的标识；
    所述接入网节点根据重复参数和所述消息子块，生成第二寻呼消息，所述重复参数用于指示重复发送所述消息子块的总个数，所述第二寻呼消息中包含N个所述消息子块，所述N为大于1的正整数，且所述N小于或等于所述重复参数；
    所述接入网节点向所述终端发送至少一次所述第二寻呼消息，以使得所有重复发送的所述消息子块的个数大于或等于所述重复参数。
  9. 根据权利要求8所述的方法，其特征在于，所述重复参数预 先存储在所述接入网节点中；
    在所述接入网节点根据重复参数和所述消息子块，生成第二寻呼消息之前，还包括：
    所述接入网节点读取预先存储在所述接入网节点中的所述重复参数。
  10. 根据权利要求8所述的方法，其特征在于，所述第一寻呼消息包含所述终端的覆盖等级；
    在所述接入网节点根据重复参数和所述消息子块，生成第二寻呼消息之前，还包括：
    所述接入网节点根据所述终端的覆盖等级确定寻呼所述终端时覆盖的增强等级，并根据所述覆盖的增强等级确定所述重复参数。
  11. 根据权利要求8所述的方法，其特征在于，所述第一寻呼消息包含所述终端的国际移动用户识别码IMSI；
    在所述接入网节点根据重复参数和所述消息子块，生成第二寻呼消息之前，还包括：
    所述接入网节点根据所述终端的IMSI和预先存储的映射关系表，获取所述终端的覆盖等级；所述映射关系表中包含所述IMSI，以及与所述IMSI对应的所述终端的覆盖等级；
    所述接入网节点根据所述终端的覆盖等级确定寻呼所述终端时覆盖的增强等级，并根据所述覆盖的增强等级确定所述重复参数。
  12. 根据权利要求8-11中任一项所述的方法，其特征在于，所述接入网节点根据重复参数和所述消息子块，生成第二寻呼消息，包括：
    所述接入网节点根据所述重复参数和预设的进行信道编码前的第二寻呼消息的长度L1，将所述消息子块重复N次得到N个所述消息子块；
    所述接入网节点对N个所述消息子块进行信道编码生成所述第二寻呼消息。
  13. 根据权利要求12所述的方法，其特征在于，
    当与所述重复参数相等个数的消息子块的总长度小于或等于所述L1时，所述N等于所述重复参数；
    当与所述重复参数相等个数的消息子块的总长度大于所述L1时，所述N小于或等于
    Figure PCTCN2014087264-appb-100003
    所述
    Figure PCTCN2014087264-appb-100004
    表示向下取整，所述L2为所述消息子块的长度。
  14. 根据权利要求8-12中任一项所述的方法，其特征在于，所述接入网节点向所述终端发送至少一次所述第二寻呼消息，包括：
    当所述N等于所述重复参数时，所述接入网节点向所述终端发送一次所述第二寻呼消息；
    当所述N小于所述重复参数时，所述接入网节点向所述终端重复发送至少两次所述第二寻呼消息。
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