WO2014100940A1 - 一种实现呼叫转接的方法、终端和系统 - Google Patents

一种实现呼叫转接的方法、终端和系统 Download PDF

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Publication number
WO2014100940A1
WO2014100940A1 PCT/CN2012/087306 CN2012087306W WO2014100940A1 WO 2014100940 A1 WO2014100940 A1 WO 2014100940A1 CN 2012087306 W CN2012087306 W CN 2012087306W WO 2014100940 A1 WO2014100940 A1 WO 2014100940A1
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WO
WIPO (PCT)
Prior art keywords
terminal
address
transfer
call
information
Prior art date
Application number
PCT/CN2012/087306
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English (en)
French (fr)
Inventor
徐燕
谢汉雄
于洋
尹瑞华
杨帆
Original Assignee
海能达通信股份有限公司
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
Application filed by 海能达通信股份有限公司 filed Critical 海能达通信股份有限公司
Priority to EP12891009.8A priority Critical patent/EP2938104B1/en
Priority to US14/654,889 priority patent/US9307377B2/en
Priority to PCT/CN2012/087306 priority patent/WO2014100940A1/zh
Publication of WO2014100940A1 publication Critical patent/WO2014100940A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/16—Communication-related supplementary services, e.g. call-transfer or call-hold
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/54—Arrangements for diverting calls for one subscriber to another predetermined subscriber
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/42136—Administration or customisation of services
    • H04M3/42153—Administration or customisation of services by subscriber

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, terminal and system for implementing call forwarding.
  • the trunking communication system is a radio mobile communication system that implements multi-user sharing of multiple channels in accordance with dynamic channel assignment.
  • the system generally consists of a mobile terminal and a dispatching station, and has functions of scheduling, group calling, and priority calling.
  • the dispatching station is mainly responsible for scheduling and intelligent allocation of the mobile terminal.
  • the dispatching station transfers the call of the mobile terminal according to the demand.
  • the dispatching station sends a target address acquisition command to the mobile terminal, and the mobile terminal transmits a target address to the dispatching station, and the dispatching station stores the received target address.
  • the calling terminal requests the calling station to call the mobile terminal.
  • the dispatching station sends a target address to the calling terminal, and the calling terminal initiates a call to the target terminal to complete the call forwarding of the mobile terminal. Pick up.
  • the call forwarding is implemented by using the above method, those skilled in the art find the following disadvantages:
  • the mobile terminal sends a destination address to the dispatching station to establish a call forwarding setting, and when the call is forwarded, the dispatching station sends the target address to the calling terminal.
  • the mobile terminal is in a passive state during the call scheduling allocation process, and is controlled by the dispatching station; in the conventional communication system without the dispatching station, the mobile terminal can only implement basic call service and information transmission function, and cannot implement call forwarding. Pick up.
  • the present invention provides a method, a terminal, and a system for implementing call forwarding.
  • a call forwarding function is implemented between mobile terminals.
  • a method for implementing call forwarding comprising:
  • the call forwarding request information is set and sent to the target terminal;
  • the target terminal reads the call transfer identifier in the call transfer request information, determines whether the call transfer identifier is correct, and if so, reads the address of the target terminal in the call transfer request information;
  • the requesting terminal receives the call transfer success response information to establish a call transfer.
  • the transit terminal address is set according to the transit address identifier:
  • the target terminal reads the address of the requesting terminal in the call forwarding request information
  • the transit terminal address is set according to the transit address identifier:
  • the target terminal reads at least one bearer terminal address in the call transfer request information; and sets at least one bearer terminal address as the transit terminal address.
  • the method further includes:
  • the target terminal reads the authorization information in the call transfer request information, determines whether the authorization information is correct, and if so, sets the transfer terminal address according to the transfer address identifier, and sets the call transfer. Successful response information is sent to the requesting terminal.
  • the method further includes: requesting the terminal to perform timing, and when the timeout period exceeds the preset threshold and the call transfer success response information is not received, the sending trigger signal triggers resending. Call transfer request information.
  • a method for implementing call transfer cancellation comprising:
  • the call forwarding cancellation information is set and sent to the target terminal;
  • the target terminal reads the transfer cancellation identifier in the call transfer cancellation information, determines whether the transfer cancellation identifier is correct, and if so, reads the address of the target terminal in the call transfer cancellation information;
  • the requesting terminal cancels the call transfer according to the call transfer cancellation success message.
  • a requesting terminal for implementing call forwarding comprising:
  • a request information setting module configured to set call forwarding request information when a call access abnormality occurs
  • the request information sending module is configured to send the call transfer request information to the target terminal, so that the target terminal reads the call transfer identifier in the call transfer request information, and determines whether the call transfer identifier is correct, and if so, reads the call transfer.
  • the response information receiving module is configured to receive a call transfer success response message to establish a call transfer.
  • the terminal further includes:
  • the timing module is configured to set the call transfer request information and send the signal to the target terminal for timing.
  • send a trigger signal to the request information sending module, where the trigger signal triggers the request information sending module to resend the call. Transfer request information.
  • a target terminal for implementing call forwarding includes:
  • a request information receiving module configured to receive call transfer request information, where the call transfer request information is set and sent when the requesting terminal has a call access abnormality
  • a call forwarding identifier determining module configured to determine whether the call forwarding identifier is correct, and if yes, reading an address of the target terminal in the call forwarding request information
  • the target terminal address determining module is configured to determine whether the address of the target terminal is correct, and if yes, read the transit address identifier in the call transfer request information;
  • a transit terminal address setting module configured to set a transit terminal address according to the transit address identifier
  • a transfer response information setting module configured to set a call transfer success response message when the address of the target terminal is correct
  • the transfer response information sending module is configured to send the call transfer success response information to the requesting terminal, so that the requesting terminal receives the call transfer success response information to establish a call transfer.
  • the transit terminal address setting module specifically includes:
  • the first address reading module is configured to read an address of the requesting terminal in the call forwarding request information; and the first address setting module sets the address of the requesting terminal as the transit terminal address.
  • the transit terminal address setting module specifically includes:
  • a second address reading module configured to read at least one carrying terminal address in the call forwarding request information
  • the second address setting module sets the at least one carrying terminal address as the transit terminal address.
  • the terminal further includes:
  • the authorization information judging module is configured to read the authorization information in the call transfer request information when the target address is correct, and determine whether the authorization information is correct, and if yes, set the transfer terminal address according to the transfer address identifier;
  • the transfer response information setting module is configured to set the call transfer success response information when the authorization information is correct.
  • a requesting terminal that implements call forwarding cancellation includes:
  • the information setting module is cancelled, and when the call access is normal, the call forwarding cancellation information is set;
  • the cancel information sending module is configured to send the call transfer cancellation information to the target terminal, so that the target terminal reads the transfer cancellation identifier in the call transfer cancellation information, and determines whether the transfer cancellation identifier is correct, and if so, reads the call transfer. Receiving the address of the target terminal in the cancellation information, determining whether the address of the target terminal is correct, and if so, reading the canceled address identifier in the call transfer cancellation information, removing the transfer terminal address according to the canceled address identifier, and Set and send the call transfer cancellation success message;
  • the cancel success information receiving module is configured to cancel the call transfer according to the call transfer cancellation success information.
  • a target terminal for implementing call transfer cancellation the terminal includes:
  • the cancel information receiving module is configured to receive call transfer cancellation information, where the call transfer cancellation information is set and sent when the requesting terminal resumes normal call access;
  • the transfer cancellation identifier determination module is configured to determine whether the transfer cancellation identifier is correct, and if yes, read the address of the target terminal in the call transfer cancellation information;
  • An address determining module configured to determine whether the address of the target terminal is correct, and if yes, read a cancel address identifier in the call transfer cancellation information
  • the cancel success information setting module is configured to set a call transfer cancellation success information when the target terminal address is correct;
  • the cancel success information sending module is configured to send the call transfer cancellation success information to the requesting terminal, so as to request the terminal to receive the call transfer cancellation success information to cancel the call transfer.
  • a system for implementing call forwarding comprising:
  • the request terminal according to the present invention and the target terminal according to the present invention.
  • the present invention has the following beneficial effects:
  • a method for implementing call forwarding when requesting a terminal to have a call access abnormality, setting call forwarding request information and transmitting the call transfer request information to the target terminal, and the target terminal reads the call transfer identifier in the call transfer request information Determining whether the call transfer identifier is correct.
  • the target terminal determines whether the address of the target terminal is correct, and if so, reading the call transfer request information Transmitting the address identifier, setting the transfer terminal address according to the transfer address identifier, and setting the call transfer success response information to the requesting terminal, requesting the terminal to receive the call transfer success response information to establish a call transfer; requesting the terminal After the call transfer request information is directly sent to the target terminal, and the target terminal verifies the correct call transfer request information, the transfer terminal address and the call transfer success response information are set, and the call transfer success response information is sent to the request terminal. Call forwarding is established, and call forwarding is implemented between terminals without going through the dispatching station.
  • FIG. 1 is a flow chart of a call forwarding method according to a first embodiment of the present invention
  • FIG. 2 is a schematic diagram of a frame structure of a control signaling block defined in a prior art digital mobile radio standard
  • FIG. 4 is a schematic structural diagram of a data block intermediate block protocol data unit of a call transfer information carrying protocol according to the present invention
  • FIG. 5 is a schematic structural diagram of a last block of a data unit of a call transfer information carrying protocol data frame according to the present invention
  • FIG. 6 is a schematic diagram of a structure of a call transfer response protocol data frame according to the present invention
  • FIG. 1 is a flow chart of a call forwarding method according to a first embodiment of the present invention
  • FIG. 2 is a schematic diagram of a frame structure of a control signaling block defined in a prior art digital mobile radio standard
  • FIG. 4 is a schematic structural diagram of a data block intermediate block protocol data unit of a call transfer information carrying protocol according to the present invention
  • FIG. 5 is
  • FIG. 7 is a flowchart of a second embodiment of a call forwarding method according to the present invention
  • FIG. 9 is a schematic structural diagram of Embodiment 5 of a target terminal for implementing call forwarding according to the present invention
  • FIG. 10 is a schematic structural diagram of Embodiment 6 of a request terminal for implementing call forwarding cancellation according to the present invention
  • Example 12 is a schematic structural diagram of a data frame of a call transfer request protocol according to Example 1 of the present invention.
  • Example 13 is a schematic structural diagram of a data frame of a call transfer response protocol according to Example 1 of the present invention.
  • Example 14 is a schematic structural diagram of a data frame of a call transfer request protocol according to Example 2 of the present invention.
  • Example 15 is a schematic structural diagram of a data frame of a call forwarding bearer protocol according to Example 2 of the present invention.
  • 16 is a schematic structural diagram of a data frame of a call transfer response protocol according to Example 2 of the present invention. detailed description
  • the invention discloses a method, a terminal and a system for realizing call forwarding, which can realize call transfer between mobile terminals without using a dispatching station.
  • the method provided by the present invention includes: when requesting a terminal to have a call access abnormality, setting a call transfer request information and transmitting the call transfer request information to the target terminal; the target terminal reads the call transfer identifier in the call transfer request information, and determines the call transfer Whether the identifier is correct, if yes, reading the address of the target terminal in the call transfer request information; the target terminal determines whether the address of the target terminal is correct, and if so, reading the transfer address identifier in the call transfer request information, And setting a transfer terminal address according to the transfer address identifier, and setting a call transfer success response message to the request terminal; requesting the terminal to receive the call transfer success response information to establish a call transfer.
  • the request terminal includes: a request information setting module, configured to set call forwarding request information when a call access abnormality occurs; and a request information sending module, configured to send call transfer request information to the target terminal, so that The target terminal reads the call transfer identifier in the call transfer request information, determines whether the call transfer identifier is correct, and if so, reads the address of the target terminal in the call transfer request information, and determines whether the address of the target terminal is correct.
  • the target terminal includes: a request information receiving module, configured to receive call transfer request information, where the call transfer request information is set and sent when a requesting terminal has abnormal call access; a determining module, configured to determine whether the call forwarding identifier is correct, and if yes, reading an address of the target terminal in the call forwarding request information; the target terminal address determining module, configured to determine whether the address of the target terminal is correct, if Transmitting the transfer address identifier in the call transfer request information; the transfer terminal address setting module, configured to set the transfer terminal address according to the transfer address identifier; and the transfer response information setting module, configured to be used as the target When the address of the terminal is correct, the call forwarding success response information is set; the transfer response information sending module is configured to send the transfer success response information to the requesting terminal, so that the requesting terminal receives the call transfer success response information to establish a call transfer.
  • a request information receiving module configured to receive call transfer request information, where the call transfer request information is set and sent when a requesting terminal has abnormal call
  • the request terminal includes: a cancel information setting module, configured to set a call transfer cancellation information when the call access is normal, and a cancel information sending module, configured to send the call transfer cancellation information to the target terminal, so that The target terminal reads the transfer cancellation identifier in the call transfer cancellation information, determines whether the transfer cancellation identifier is correct, and if so, reads the address of the target terminal in the call transfer cancellation information, and determines whether the address of the target terminal is correct. If yes, the canceled address identifier in the call forwarding cancellation information is read, the transfer terminal address is removed according to the canceled address identifier, and the call transfer cancellation success information is set and sent; the cancel success information receiving module is configured to The call transfer cancellation success message cancels the call transfer.
  • a cancel information setting module configured to set a call transfer cancellation information when the call access is normal
  • a cancel information sending module configured to send the call transfer cancellation information to the target terminal, so that The target terminal reads the transfer cancellation identifier in the call transfer cancellation information, determines whether the transfer cancellation
  • the target terminal includes: a cancel information receiving module, configured to receive a call Transfer cancellation information, the call transfer cancellation information is set and sent when the requesting terminal resumes normal call access; the transfer cancellation identification determination module is configured to determine whether the transfer cancellation identifier is correct, and if so, to read the call The address of the target terminal in the transfer cancellation information; the address determining module is configured to determine whether the address of the target terminal is correct, and if yes, read the cancel address identifier in the call transfer cancellation information; The cancel address identifier removes the transfer terminal address; the cancel success information setting module is configured to set the call transfer cancellation success information when the target terminal address is correct; the cancel success information sending module is configured to cancel the call transfer The success message is sent to the requesting terminal to request the terminal to receive the call forwarding cancellation success message to cancel the call forwarding.
  • a cancel information receiving module configured to receive a call Transfer cancellation information, the call transfer cancellation information is set and sent when the requesting terminal resumes normal call access
  • the transfer cancellation identification determination module is configured to determine whether the transfer cancellation
  • the system provided by the present invention comprises: a requesting terminal provided by the present invention and a target terminal provided by the present invention.
  • FIG. 1 is a flowchart of a first embodiment of a call forwarding method according to the present invention. The method includes the following steps: Step 101: When requesting a terminal to have a call access abnormality, set call forwarding request information and send it to the target terminal.
  • Requesting a terminal call access exception includes a wide variety of situations. When encountering such situations as leaving the service area, battery alarms, and busy calls, the requesting terminal may automatically trigger the establishment of a call transfer request; when a business trip or the like is encountered, the user may also set up a trigger call transfer request.
  • the requesting terminal sets call forwarding information when the call access is abnormal, specifically, sets a call transfer request protocol data frame, and performs each information element in the call transfer request protocol data frame.
  • the definition of the body is a call transfer request protocol data frame.
  • the frame structure of the Control Signaling Block is defined in the Digital Mobile Radio (DMR) standard, as shown in Figure 2. Among them, 64-bit data of byte 2 ⁇ byte 9 can be customized.
  • DMR Digital Mobile Radio
  • FIG. 3 is a schematic diagram of the structure of a call transfer request protocol data frame, wherein each information element is defined as follows:
  • Table 1 shows the last block (Last_Block, LB) information unit definition, which takes up 1 bit and is represented by a 1-bit binary code.
  • LB the last block
  • Table 1 The last piece of LB information unit definition Table 2 shows the definition of the Protected Flag (PF) information element, which takes up 1 bit and is represented by a 1-bit binary code. The value of PF is 0, indicating reserved information elements.
  • PF Protected Flag
  • Table 3 shows the Control Signalling Block Opcode (CSBK Opcode) information element definition, which takes up 6 bits and is represented by a 6-bit binary code.
  • CSBK Opcode Control Signalling Block Opcode
  • Table 3 shows the Control Signalling Block Opcode (CSBK Opcode) information element definition, which takes up 6 bits and is represented by a 6-bit binary code.
  • CSBK Opcode When the value of CSBK Opcode is 110110, it is expressed as call forwarding request control signaling operation code; when CSBK When the value of Opcode is 110111, it is expressed as the call transfer response control signaling operation code.
  • the control signaling operation code may set other values according to actual conditions, which is not limited herein.
  • Table 4 shows the manufacturer's feature set ID (MFID) information unit definition, which is 8 bits long and is represented by an 8-bit binary code. When the value of MFID is 00000000, it is expressed as the ID of the DMR standard service.
  • MFID manufacturer's feature set ID
  • Table 5 shows the group or lndicidual (G/I) information element definition, which takes up 1 bit and is represented by a 1-bit binary code. When the value of G/I is 0, it indicates that the target address of the call is a single mobile station; when the value of G/I is 1, it indicates that the target address of the call is a group of mobile stations.
  • G/I group or lndicidual
  • the destination address of the call is a single mobile station
  • the destination address of the call is a group of mobile stations.
  • Table 6 shows the definition of the Operate Code (OC) information element, which is 2 bits long and is represented by a 2-digit binary code. When the value of OC is 00, it indicates call forwarding establishment operation; when the value of OC is 01, it indicates call forwarding cancellation operation.
  • OC Operate Code
  • Table 7 shows the number of address (NOA) information unit definitions.
  • NOA address
  • the occupied length is 4 bits and is represented by a 4-bit binary code. When the value of NOA is 0, it indicates that the source terminal address is the call forwarding address; when the NOA is any value from 1 to 15, it indicates the number of call forwarding for the third-party terminal, and the third-party terminal address is the portable terminal. address.
  • Table 7 Number of Transfer Addresses N0A Information Element Definition Table 8 shows the definition of the address information unit, which is 24 bits long and is represented by a 24-bit binary code. The value of the address is between 1 and 16764415, and the requesting terminal address indicates call forwarding. Initiator address; The target terminal address indicates the call forwarding destination address, and the carrying terminal address indicates the address for which the third party has multiple parties for call forwarding.
  • a call transfer information carrying protocol data frame including: an intermediate block protocol data unit (as shown in FIG. 4) and a last protocol data unit (FIG. 5). Shown).
  • the present invention can transfer calls to up to six mobile terminals to the same target terminal.
  • the call forwarding information carries a protocol data frame
  • the intermediate block protocol data unit carries the upper 8 bits of information of the fourth carrying terminal address; the last piece of the protocol data unit carries the 16 bits of the fourth carrying terminal address.
  • the set call transfer request information is sent to the target terminal through a regular time division multiple access channel.
  • Step 102 The target terminal reads the call transfer identifier in the call transfer request information, determines whether the call transfer identifier is correct, and if so, reads the address of the target terminal in the call transfer request information.
  • the call forwarding identifier read by the target terminal is specifically a control signaling operation code in the transfer request protocol frame, that is, the definition of the information unit of the control signaling operation code according to Table 3 above, and the control signaling operation code CSBK Opcode The value should be 110110.
  • the address of the target terminal refers to the address of the call transfer destination, which is a number between 1 and 16764415.
  • Step 103 The target terminal determines whether the address of the target terminal is correct. If yes, the transit address identifier in the call transfer request information is read, the transfer terminal address is set according to the transfer address identifier, and the call transfer is set. Successful response information is sent to the requesting terminal.
  • the transit address identifier read by the target terminal is specifically the number of transit addresses in the transfer request protocol frame, that is, the definition of the information unit of the number of transit addresses according to Table 6 above, when the number of transit addresses read is 0, indicating that the requesting terminal address is the transfer terminal address, and the read request terminal address is set to the transfer terminal address; when the number of read transfer addresses is any one of 1 to 15, it indicates that the call is made by a third party.
  • the call forwarding success response information is set, specifically, the call forwarding response protocol data frame is set, and each information unit in the call transfer response protocol data frame is specifically defined.
  • Figure 6 shows the structure of the call transfer response protocol data frame.
  • the information unit definition of LB is shown in Table 1; the information unit definition of PF is shown in Table 2; the information unit definition of CSBK Opcode is as shown in Table 3, that is, the value of CSBK Opcode should be set to 110111; the information unit of MFID The definition is shown in Table 4. I won't go into details here.
  • Table 9 shows the Response Code (RC) information element definition, occupying 8 bits in length, represented by 8-bit binary code.
  • RC Response Code
  • Step 104 The terminal is requested to receive the call transfer success response information to establish a call transfer.
  • the requesting terminal When the requesting terminal receives the call transfer success response message sent by the target terminal, the requesting terminal displays that the call transfer is successful.
  • the present invention has the following beneficial effects:
  • a call forwarding method provided by the present invention when requesting a terminal to have a call access abnormality, setting call forwarding request information and transmitting the call transfer request information to the target terminal, and the target terminal reads the call transfer identifier in the call transfer request information, Determining whether the call transfer identifier is correct.
  • the target terminal determines whether the address of the target terminal is correct, and if so, reading the call in the call transfer request information Connect the address identifier, set the transfer terminal address according to the transfer address identifier, and set the call transfer success response information to the request terminal, request the terminal to receive the call transfer success response information to establish a call transfer; request the terminal to transfer the call
  • the request information is directly sent to the target terminal, and after the target terminal verifies the correct call forwarding request information, the transfer terminal address and the call transfer success response information are set, and the call transfer success response information is sent to the request terminal to establish call forwarding. No need to pass the dispatching station, and the terminal can realize the setting call by itself. Transfer.
  • FIG. 7 is a flowchart of Embodiment 2 of a call forwarding method according to the present invention, and Embodiment 1
  • the second embodiment further verifies the correctness of the authorization information, which specifically includes:
  • Step 701 When the terminal is requested to have a call access abnormality, the call transfer request information is set and sent to the target terminal.
  • Set call forwarding request information specifically set the call transfer request protocol data frame.
  • the definition of the last block LB, protection flag PF, control signaling operation code CSBK Opcode, vendor identification code MFID, group call/single call G/I, call transfer operation code OC, transit address number NOA and address information unit As described in the first embodiment, it will not be described here.
  • Table 10 shows the Authorization Code (AC) information element definition, which takes up 8 bits and is represented by an 8-bit binary code.
  • the value of the authorization code is between 0 and 255, indicating the authorization code value of the call transfer.
  • the authorization code is customized according to the target terminal.
  • the requesting terminal performs timing while transmitting the call transfer request information to the target terminal, and sets a timing preset threshold according to actual needs. When the timing exceeds the preset threshold, the call forwarding response information sent by the target terminal has not been received, and it is determined whether the number of retransmissions is exhausted. If yes, the call forwarding establishment fails; if not, the sending trigger signal triggers resending. Call transfer request information.
  • the requesting terminal receives the call transfer success response message returned by the target terminal within the preset threshold, it indicates that the requesting terminal call transfer establishment is successful.
  • Step 702 The target terminal reads the call transfer identifier in the call transfer request information, and determines whether the call transfer identifier is correct. If yes, step 703 is performed.
  • the call forwarding identifier read by the target terminal is specifically the control signaling operation code in the handover request protocol frame, and the value of the control signaling operation code is 110110, indicating that the call forwarding identifier is correct.
  • Step 703 The target terminal reads the address of the target terminal in the call transfer request information, and determines whether the address of the target terminal is correct. If yes, step 704 is performed.
  • the address of the target terminal refers to the address of the call transfer recipient.
  • the target terminal reads the authorization code in the call forwarding request information, specifically the authorization code in the transfer request protocol frame.
  • Step 704 The target terminal reads the authorization information in the call transfer request information, and determines whether the authorization information is correct. If yes, go to step 705; if no, go to step 706.
  • the authorization code is an 8-bit binary code, which is a number between 0 and 255.
  • the authorization code is correct.
  • Step 705 Set the transfer terminal address according to the transfer address identifier, and set the call transfer success response information to be sent to the request terminal.
  • Step 706 Set a call transfer failure response message to the requesting terminal.
  • Step 707 The requesting terminal establishes a call transfer according to the received call transfer response information.
  • the requesting terminal receives the call transfer success response message, it indicates that the call transfer establishment is successful.
  • the requesting terminal receives the call transfer failure response message, it indicates that the call transfer establishment fails.
  • a method for canceling a call transfer including:
  • Step 1 When the terminal is requested to resume the call access, the call forwarding cancellation information is set concurrently. Send to the target terminal.
  • the call forwarding cancellation information is set to be sent to the target terminal, specifically, the call forwarding cancellation protocol data frame is set.
  • the definition of the last block LB, the protection flag PF, the control signaling operation code CSBK Opcode, the vendor identification code MFID, the group call/single call G/I, the number of transit addresses NOA, and the address information unit are the same as those in the first embodiment. Let me repeat.
  • Step 2 The target terminal reads the transfer cancellation identifier in the call transfer cancellation information, determines whether the transfer cancellation identifier is correct, and if so, reads the address of the target terminal in the call transfer cancellation information.
  • Step 3 The target terminal determines whether the address of the target terminal is correct. If yes, the canceled address identifier in the call transfer cancellation information is read, the transfer terminal address is removed according to the canceled address identifier, and the call transfer cancellation is set. Successful information is sent to the requesting terminal.
  • Step 4 The requesting terminal cancels the call transfer according to the call transfer cancellation success information.
  • the authorization information in the call transfer cancellation information is read, and the authorization information is determined to be correct. If yes, the canceled address identifier in the call transfer cancellation information is read, according to the cancellation. The address identifier removes the transfer terminal address, and sets the call transfer cancellation success information to the requesting terminal.
  • FIG. 8 is a schematic structural diagram of Embodiment 4 of a call forwarding request terminal according to the present invention, which includes:
  • the request information setting module 801 is configured to set call forwarding request information when a call access abnormality occurs.
  • the call forwarding request information is the same as that in the first embodiment, and details are not described herein again.
  • the request information sending module 802 is configured to send the call transfer request information to the target terminal, so that the target terminal reads the call transfer identifier in the call transfer request information, determines whether the call transfer identifier is correct, and if so, reads the call. Transmitting the address of the target terminal in the request information, determining whether the address of the target terminal is correct, and if so, reading the transit address identifier in the call transfer request information, and setting the transit terminal address according to the transfer address identifier , and set and send a call transfer success response message.
  • the response information receiving module 803 is configured to receive a call transfer success response message to establish a call transfer.
  • the requesting terminal of the call transfer further comprises:
  • the timing module is configured to set the call transfer request information and send the signal to the target terminal for timing.
  • send a trigger signal to the request information sending module, where the trigger signal triggers the request information sending module to resend the call. Transfer request information.
  • FIG. 9 is a schematic structural diagram of Embodiment 5 of a target terminal for call forwarding according to the present invention, including:
  • the request information receiving module 901 is configured to receive call transfer request information, where the call transfer request information is set and sent when the request terminal has a call access abnormality.
  • the call forwarding identifier determining module 902 is configured to determine whether the call forwarding identifier is correct, and if yes, read the address of the target terminal in the call forwarding request information.
  • the target terminal address determining module 903 is configured to determine whether the address of the target terminal is correct, and if yes, read the transit address identifier in the call transfer request information.
  • the transfer terminal address setting module 904 is configured to set the transfer terminal address according to the transfer address identifier.
  • the transfer response information setting module 905 is configured to set the call transfer success response information when the address of the target terminal is correct.
  • the transfer response information sending module 906 is configured to send the transfer success response information to the requesting terminal, so that the requesting terminal receives the call transfer success response information to establish a call transfer.
  • the transit terminal address setting module specifically includes:
  • the first address reading module is configured to read an address of the requesting terminal in the call forwarding request information; and the first address setting module sets the address of the requesting terminal as the transit terminal address.
  • a second address reading module configured to read at least one carrying terminal address in the call forwarding request information
  • the second address setting module sets the at least one carrying terminal address as the transit terminal address.
  • the target terminal further includes:
  • the authorization information judging module is configured to read the authorization information in the call transfer request information when the target address is correct, and determine whether the authorization information is correct, and if yes, set the transfer terminal address according to the transfer address identifier;
  • the transfer response information setting module is configured to set the call transfer success response information when the authorization information is correct.
  • FIG. 10 is a schematic structural diagram of Embodiment 6 of a requesting terminal for implementing call forwarding cancellation according to the present invention, including:
  • the cancel information setting module 1001 is configured to set call forwarding cancellation information when the call access is normal.
  • the cancel information sending module 1002 is configured to send the call transfer cancellation information to the target terminal, so that the target terminal reads the transfer cancellation identifier in the call transfer cancellation information, determines whether the transfer cancellation identifier is correct, and if so, reads the call. Transmitting the address of the target terminal in the cancellation information, determining whether the address of the target terminal is correct, and if so, reading the cancellation address identifier in the call forwarding cancellation information, and removing the transit terminal address according to the cancellation address identifier, And set and send a call transfer cancellation success message.
  • the cancel success information receiving module 1003 is configured to cancel the call transfer according to the call transfer cancellation success information.
  • FIG. 11 is a schematic structural diagram of Embodiment 7 of a target terminal for implementing call forwarding cancellation according to the present invention, including:
  • the cancel information receiving module 1101 is configured to receive call transfer cancellation information, where the call transfer cancellation information is set and sent when the requesting terminal resumes call access normal.
  • the transfer cancellation identification determining module 1102 is configured to determine whether the transfer cancellation identifier is correct, and if yes, read the address of the target terminal in the call transfer cancellation information.
  • the address judging module 1103 is configured to determine whether the address of the target terminal is correct, and if yes, read the cancel address identifier in the call transfer cancellation information.
  • the removing module 1104 is configured to remove the transit terminal address according to the canceled address identifier.
  • the cancel success information setting module 1105 is configured to set the call transfer cancellation success information when the target terminal address is correct.
  • the cancel success information sending module 1106 is configured to send the call transfer cancellation success information to the requesting terminal, so as to request the terminal to receive the call transfer cancellation success information to cancel the call transfer.
  • a call forwarding system includes:
  • the request terminal provided by the present invention and the target terminal provided by the present invention are the request terminal provided by the present invention and the target terminal provided by the present invention.
  • Example 1 The requesting terminal is A, the target terminal is B, and the requesting terminal A performs call forwarding for itself, and the target terminal of the call transfer is B, that is, when the requesting terminal A access is abnormal, the call is automatically transferred to the target. Terminal B.
  • the call forwarding establishment request is triggered.
  • Set call forwarding request information that is, call transfer request protocol data frame.
  • the last block LB is set to 1; the protection flag PF is set to 0; the control signaling operation code CSBK Opcode is set to 110110; the group call/single call G /I is set to 0, indicating that the object for establishing call forwarding is a single call; the call transfer operation code OC is set to 0, indicating that call forwarding is established; the number of transfer addresses NOA is set to 0, indicating that the call is requested to be forwarded by the requesting terminal itself.
  • the address of the requesting terminal is the transit terminal address; the authorization code is set to the authorization code matching the target terminal B; the address of the requesting terminal is set to the address of A; the address of the target terminal is set to the address of B.
  • the set call forwarding request protocol data frame is shown in Figure 12.
  • the target terminal B After receiving the call transfer request information, the target terminal B determines the call transfer identifier, that is, the control Is the signaling operation code CSBK Opcode correct, and if so, the address of the target terminal is read. It is judged whether the address of the target terminal is the address of the target terminal B, and if so, the authorization code is read. Determine whether the authorization code matches the target terminal B. If the CSBK Opcode is correct, the target terminal address is correct, and the authorization code match is established, set the transfer terminal address to the address of the requesting terminal A, and set the call transfer success response information.
  • the last block LB is set to 1; the protection flag PF is set to 0; the control signaling opcode CSBK Opcode is set to 110111; the response code is set to 0.
  • the set call forwarding response protocol data frame is shown in Figure 13.
  • the requesting terminal A After receiving the call transfer success response message, the requesting terminal A establishes the call transfer success, and when the request terminal A accesses the abnormality, the call automatically transfers the target terminal.
  • the target terminal B After receiving the call transfer cancellation information, the target terminal B determines the transfer cancellation flag, that is, whether the control signaling operation code CSBK Opcode is correct, and if so, reads the address of the target terminal. It is judged whether the address of the target terminal is the address of the target terminal B, and if so, the authorization code is read. Determine whether the authorization code matches the target terminal B. If the CSBK Opcode is correct, the target terminal address is correct, and the authorization code match is established, the canceled address identifier removes the transfer terminal address, and Set the call forwarding cancellation success message.
  • the last block LB is set to 1; the protection flag PF is set to 0; the control signaling opcode CSBK Opcode is set to 110111; the response code is set to 0.
  • Example 2 The requesting terminal is C, the target terminal is D, and the requesting terminal C performs call forwarding for the third terminal E and F, and the target terminal of the call transfer is D, that is, when the requesting terminal E and F access abnormality, Automatically transfer the call to the target terminal D.
  • the requesting terminal C sets the call transfer request information, that is, the call transfer request protocol data frame and the call transfer request carry the data frame.
  • the last block LB is set to 1; the protection flag PF is set to 0; and the control signaling operation code CSBK Opcode is set. 110110; group call/single call G/I is set to 1, indicating that the call forwarding object is a group call; the call transfer operation code OC is set to 0, indicating that call forwarding is established; the number of transit addresses NOA is set to 2 Indicates that two third-party terminals E and F perform call forwarding.
  • the addresses of terminal E and terminal F are transit terminal addresses; the authorization code is set to an authorization code matching the target terminal D; and the address of the requesting terminal is set to C. Address; The address of the target terminal is set to the address of D.
  • the set call forwarding request protocol data frame is shown in Figure 14.
  • the last block LB is set to 1; the protection flag PF is set to 0; the control signaling operation code CSBK Opcode is set to 110110; the address of the terminal E is set to the first bearer terminal address; The address is set to the second carrying terminal address.
  • the call transfer protocol data frame is shown in Figure 15.
  • the target terminal D After receiving the call transfer request information, the target terminal D determines the call transfer identifier, that is, whether the control signaling operation code CSBK Opcode is correct, and if so, reads the address of the target terminal. Judge Whether the address of the target terminal is the address of the target terminal D, and if so, the authorization code is read. It is judged whether the authorization code matches the target terminal D. If the CSBK Opcode is correct, the target terminal address is correct, and the authorization code matches, the address of the terminal E and the terminal F is set as the transit terminal address, and the call transfer success response information is set.
  • the last block LB is set to 1; the protection flag PF is set to 0; the control signaling opcode CSBK Opcode is set to 110111; the response code is set to 0.
  • the set call forwarding response protocol data frame is shown in Figure 16.
  • the requesting terminal C After receiving the call transfer success response message, the requesting terminal C establishes a call transfer success for the third party terminal E and the terminal F. When the terminal E and the terminal F access the abnormality, the call is automatically transferred to the target terminal D.
  • each mobile terminal when the call forwarding cancellation setting call forwarding cancellation information is established, only the call forwarding operation code OC in the call forwarding cancellation data protocol frame is set to 1, and other settings are as described in the first embodiment, here. No longer.
  • Each mobile terminal can serve as both a requesting terminal and a target terminal. Therefore, each mobile terminal has a function of transmitting call transfer request information and transmitting call transfer response information, and is not limited.
  • the requesting terminal C may perform the call transfer cancellation for the third-party terminal E and the terminal F, and may also cancel the call transfer by the third-party terminal E and the terminal F, which is not specifically limited herein.
  • the mobile terminal may only serve as one of the requesting terminal or the target terminal, or may serve as both the requesting terminal and the target terminal of the other terminal; the mobile terminal may perform only one of call forwarding or call forwarding cancellation.
  • the mobile terminal may perform only one of call forwarding or call forwarding cancellation.
  • the present invention performs call forwarding for the intercom, and may also establish call forwarding for other mobile terminals that use conventional time division multiple access channels for communication, which is not limited herein.

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Abstract

本发明公开了一种实现呼叫转接的方法、终端和系统。所述方法包括：请求终端出现呼叫接入异常时，设置呼叫转接请求信息并发送到目标终端（101）；目标终端读取呼叫转接请求信息中的呼叫转接标识，判断呼叫转接标识是否正确，如果是，读取呼叫转接请求信息中的目标终端的地址（102）；目标终端判断所述目标终端的地址是否正确，如果是，读取呼叫转接请求信息中的转接地址标识，根据所述转接地址标识设置转接终端地址，并设置呼叫转接成功响应信息发送到请求终端（103）；请求终端接收呼叫转接成功响应信息建立呼叫转接（104）。本发明还提供了与方法相适应的终端和系统，在无调度台的情况下，移动终端之间实现呼叫转接，用户可根据需要，采用不同的转接地址标识满足不同应用场景的需求。

Description

一种实现呼叫转接的方法、 终端和系统 技术领域
本发明涉及通信技术领域， 特别是涉及一种实现呼叫转接的方法、 终 端和系统。
背景技术
集群通信系统是按照动态信道指配的方式实现多用户共享多信道的无 线电移动通信系统。 该系统一般由移动终端和调度台组成， 具有调度、 群 呼和优先呼等功能。 当前的集群通信系统中， 调度台主要负责移动终端的 调度和智能分配， 当移动终端呼叫遇忙或电量耗尽等无法接入呼叫时， 调 度台根据需求对该移动终端的呼叫进行转接。 移动终端在调度台注册后， 向调度台申请呼叫转接， 调度台向移动终 端发送目标地址获取指令， 移动终端向调度台发送目标地址， 调度台将所 接收到的目标地址进行存储。 呼叫终端向调度台请求呼叫移动终端， 当移 动终端呼叫遇忙或电量耗尽等无法接入呼叫时， 调度台向呼叫终端发送目 标地址， 呼叫终端向目标终端发起呼叫， 完成移动终端的呼叫转接。 本领域技术人员在使用上述方法实现呼叫转接时， 发现有如下缺点： 移动终端向调度台发送目标地址建立呼叫转接设置， 当进行呼叫转接 时， 由调度台向呼叫终端发送目标地址实现呼叫转接， 移动终端在呼叫调 度分配过程中处于被动状态， 受到调度台的控制； 在无调度台的常规通信 系统中， 移动终端只能实现基本的呼叫业务和信息传送功能， 无法实现呼 叫转接。
发明内容 有鉴于此， 本发明提供了一种实现呼叫转接的方法、 终端和系统， 在 无调度台的情况下， 移动终端之间实现呼叫转接功能。
一种实现呼叫转接的方法， 所述方法包括：
请求终端出现呼叫接入异常时， 设置呼叫转接请求信息并发送到目标 终端；
目标终端读取呼叫转接请求信息中的呼叫转接标识， 判断呼叫转接标 识是否正确， 如果是， 读取呼叫转接请求信息中的目标终端的地址；
目标终端判断所述目标终端的地址是否正确， 如果是， 读取呼叫转接 请求信息中的转接地址标识， 根据所述转接地址标识设置转接终端地址， 并设置呼叫转接成功响应信息发送到请求终端；
请求终端接收呼叫转接成功响应信息建立呼叫转接。
优选的， 转接地址标识为源终端标识时， 所述根据所述转接地址标识 设置转接终端地址为：
目标终端读取呼叫转接请求信息中的请求终端的地址；
将请求终端的地址设置为转接终端地址。
优选的， 转接地址标识为旁终端标识时， 所述根据所述转接地址标识 设置转接终端地址为：
目标终端读取呼叫转接请求信息中的至少一个携带终端地址； 将至少一个携带终端地址设置为转接终端地址。
优选的， 所述目标终端地址正确之后进一步包括：
目标终端读取呼叫转接请求信息中的授权信息， 判断授权信息是否正 确， 如果是， 根据所述转接地址标识设置转接终端地址， 并设置呼叫转接 成功响应信息发送到请求终端。
优选的，所述设置呼叫转接请求信息并发送到目标终端后进一步包括： 请求终端进行计时， 当计时时间超过预设阈值还未接收到呼叫转接成 功响应信息时， 发送触发信号触发重新发送呼叫转接请求信息。
一种实现呼叫转接取消的方法， 所述方法包括：
请求终端恢复呼叫接入正常时， 设置呼叫转接取消信息并发送到目标 终端；
目标终端读取呼叫转接取消信息中的转接取消标识， 判断转接取消标 识是否正确， 如果是， 读取呼叫转接取消信息中的目标终端的地址；
目标终端判断所述目标终端的地址是否正确， 如果是， 读取呼叫转接 取消信息中的取消地址标识， 居所述取消地址标识移除转接终端地址， 并设置呼叫转接取消成功信息发送到请求终端；
请求终端根据呼叫转接取消成功信息取消呼叫转接。
一种实现呼叫转接的请求终端， 所述终端包括：
请求信息设置模块， 用于出现呼叫接入异常时， 设置呼叫转接请求信 息；
请求信息发送模块， 用于将呼叫转接请求信息发送到目标终端， 以便 目标终端读取呼叫转接请求信息中的呼叫转接标识， 判断呼叫转接标识是 否正确， 如果是， 读取呼叫转接请求信息中的目标终端的地址， 判断所述 目标终端的地址是否正确， 如果是， 读取呼叫转接请求信息中的转接地址 标识， 根据所述转接地址标识设置转接终端地址， 以及设置并发送呼叫转 接成功响应信息； 响应信息接收模块， 用于接收呼叫转接成功响应信息建立呼叫转接。 优选的， 所述终端进一步包括：
计时模块，用于设置呼叫转接请求信息并发送到目标终端后进行计时， 当计时时间超过预设阈值时， 向请求信息发送模块发送触发信号， 所述触 发信号触发请求信息发送模块重新发送呼叫转接请求信息。
一种实现呼叫转接的目标终端， 所述终端包括：
请求信息接收模块， 用于接收呼叫转接请求信息， 所述呼叫转接请求 信息为请求终端出现呼叫接入异常时所设置并发送的；
呼叫转接标识判断模块， 用于判断呼叫转接标识是否正确， 如果是， 读取呼叫转接请求信息中的目标终端的地址；
目标终端地址判断模块， 用于判断所述目标终端的地址是否正确， 如 果是， 读取呼叫转接请求信息中的转接地址标识；
转接终端地址设置模块， 用于根据所述转接地址标识设置转接终端地 址；
转接响应信息设置模块， 用于当所述目标终端的地址正确时， 设置呼 叫转接成功响应信息；
转接响应信息发送模块， 用于将呼叫转接成功响应信息发送到请求终 端， 以便请求终端接收呼叫转接成功响应信息建立呼叫转接。
优选的， 转接地址标识为源终端标识时， 所述转接终端地址设置模块 具体包括：
第一地址读取模块，用于读取呼叫转接请求信息中的请求终端的地址； 第一地址设置模块， 将请求终端的地址设置为转接终端地址。 优选的， 转接地址标识为旁终端标识时， 所述转接终端地址设置模块 具体包括：
第二地址读取模块， 用于读取呼叫转接请求信息中的至少一个携带终 端地址；
第二地址设置模块， 将至少一个携带终端地址设置为转接终端地址。 优选的， 所述终端进一步包括：
授权信息判断模块， 用于目标地址正确时， 读取呼叫转接请求信息中 的授权信息， 判断授权信息是否正确， 如果是， 根据所述转接地址标识设 置转接终端地址；
转接响应信息设置模块， 用于当授权信息正确时， 设置呼叫转接成功 响应信息。
一种实现呼叫转接取消的请求终端， 所述终端包括：
取消信息设置模块， 用于恢复呼叫接入正常时， 设置呼叫转接取消信 息；
取消信息发送模块， 用于将呼叫转接取消信息发送到目标终端， 以便 目标终端读取呼叫转接取消信息中的转接取消标识， 判断转接取消标识是 否正确， 如果是， 读取呼叫转接取消信息中的目标终端的地址， 判断所述 目标终端的地址是否正确， 如果是， 读取呼叫转接取消信息中的取消地址 标识， 根据所述取消地址标识移除转接终端地址， 以及设置并发送呼叫转 接取消成功信息；
取消成功信息接收模块， 用于根据呼叫转接取消成功信息取消呼叫转 接。 一种实现呼叫转接取消的目标终端， 所述终端包括：
取消信息接收模块， 用于接收呼叫转接取消信息， 所述呼叫转接取消 信息为请求终端恢复呼叫接入正常时所设置并发送的；
转接取消标识判断模块， 用于判断转接取消标识是否正确， 如果是， 读取呼叫转接取消信息中的目标终端的地址；
地址判断模块， 用于判断所述目标终端的地址是否正确， 如果是， 读 取呼叫转接取消信息中的取消地址标识；
移除模块， 用于根据所述取消地址标识移除转接终端地址；
取消成功信息设置模块， 用于当所述目标终端地址正确时， 设置呼叫 转接取消成功信息；
取消成功信息发送模块， 用于将呼叫转接取消成功信息发送到请求终 端， 以便请求终端接收呼叫转接取消成功信息取消呼叫转接。
一种实现呼叫转接的系统， 所述系统包括：
本发明所述的请求终端和本发明所述的目标终端。
由上述内容可知， 本发明有如下有益效果：
本发明所提供的一种实现呼叫转接的方法， 请求终端出现呼叫接入异 常时， 设置呼叫转接请求信息并发送到目标终端， 目标终端读取呼叫转接 请求信息中的呼叫转接标识， 判断呼叫转接标识是否正确， 如果是， 读取 呼叫转接请求信息中的目标终端的地址， 目标终端判断所述目标终端的地 址是否正确， 如果是， 读取呼叫转接请求信息中的转接地址标识， 根据所 述转接地址标识设置转接终端地址， 并设置呼叫转接成功响应信息发送到 请求终端， 请求终端接收呼叫转接成功响应信息建立呼叫转接； 请求终端 将呼叫转接请求信息直接发送到目标终端， 目标终端验证呼叫转接请求信 息的正确后， 设置转接终端地址和呼叫转接成功响应信息， 并将呼叫转接 成功响应信息发送到请求终端， 建立呼叫转接， 无需通过调度台， 终端之 间实现呼叫转接。 附图说明
附图用来提供对本发明的进一步理解， 并且构成说明书的一部分， 与 本发明实施例一起用于解释本发明， 并不构成对本发明的限制。 在附图中： 图 1为本发明一种呼叫转接方法实施例一流程图； 图 2为现有技术数字移动无线电标准中定义的控制信令块的帧结构示 意图； 图 3为本发明呼叫转接请求协议数据帧结构示意图； 图 4为本发明呼叫转接信息携带协议数据帧中间块协议数据单元结构 示意图； 图 5为本发明呼叫转接信息携带协议数据帧最后一块协议数据单元结 构示意图； 图 6为本发明呼叫转接响应协议数据帧结构示意图； 图 7为本发明一种实现呼叫转接方法实施例二流程图； 图 8为本发明一种实现呼叫转接的请求终端实施例四结构示意图； 图 9为本发明一种实现呼叫转接的目标终端实施例五结构示意图； 图 10 为本发明一种实现呼叫转接取消的请求终端实施例六结构示意 图； 图 11 为本发明一种实现呼叫转接取消的目标终端实施例七结构示意 图；
图 12为本发明例 1呼叫转接请求协议数据帧结构示意图；
图 13为本发明例 1呼叫转接响应协议数据帧结构示意图；
图 14为本发明例 2呼叫转接请求协议数据帧结构示意图；
图 15为本发明例 2呼叫转接携带协议数据帧结构示意图；
图 16为本发明例 2 呼叫转接响应协议数据帧结构示意图。 具体实施方式
本发明公开了一种实现呼叫转接的方法、 终端和系统， 无需使用调度 台即可实现移动终端之间的呼叫转接。
本发明所提供的方法， 包括： 请求终端出现呼叫接入异常时， 设置呼 叫转接请求信息并发送到目标终端； 目标终端读取呼叫转接请求信息中的 呼叫转接标识， 判断呼叫转接标识是否正确， 如果是， 读取呼叫转接请求 信息中的目标终端的地址； 目标终端判断所述目标终端的地址是否正确， 如果是， 读取呼叫转接请求信息中的转接地址标识， 根据所述转接地址标 识设置转接终端地址， 并设置呼叫转接成功响应信息发送到请求终端； 请 求终端接收呼叫转接成功响应信息建立呼叫转接。
本发明所提供的请求终端， 包括： 请求信息设置模块， 用于出现呼叫 接入异常时， 设置呼叫转接请求信息； 请求信息发送模块， 用于将呼叫转 接请求信息发送到目标终端， 以便目标终端读取呼叫转接请求信息中的呼 叫转接标识， 判断呼叫转接标识是否正确， 如果是， 读取呼叫转接请求信 息中的目标终端的地址， 判断所述目标终端的地址是否正确， 如果是， 读 取呼叫转接请求信息中的转接地址标识， 根据所述转接地址标识设置转接 终端地址， 以及设置并发送呼叫转接成功响应信息； 响应信息接收模块， 用于接收呼叫转接成功响应信息建立呼叫转接。
本发明所提供的目标终端， 包括： 请求信息接收模块， 用于接收呼叫 转接请求信息， 所述呼叫转接请求信息为请求终端出现呼叫接入异常时所 设置并发送的； 呼叫转接标识判断模块， 用于判断呼叫转接标识是否正确， 如果是， 读取呼叫转接请求信息中的目标终端的地址； 目标终端地址判断 模块， 用于判断所述目标终端的地址是否正确， 如果是， 读取呼叫转接请 求信息中的转接地址标识； 转接终端地址设置模块， 用于根据所述转接地 址标识设置转接终端地址； 转接响应信息设置模块， 用于当所述目标终端 的地址正确时， 设置呼叫转接成功响应信息； 转接响应信息发送模块， 用 于将转接成功响应信息发送到请求终端， 以便请求终端接收呼叫转接成功 响应信息建立呼叫转接。
本发明所提供的请求终端， 包括： 取消信息设置模块， 用于恢复呼叫 接入正常时， 设置呼叫转接取消信息； 取消信息发送模块， 用于将呼叫转 接取消信息发送到目标终端， 以便目标终端读取呼叫转接取消信息中的转 接取消标识， 判断转接取消标识是否正确， 如果是， 读取呼叫转接取消信 息中的目标终端的地址， 判断所述目标终端的地址是否正确， 如果是， 读 取呼叫转接取消信息中的取消地址标识， 根据所述取消地址标识移除转接 终端地址， 以及设置并发送呼叫转接取消成功信息； 取消成功信息接收模 块， 用于根据呼叫转接取消成功信息取消呼叫转接。
本发明所提供的目标终端， 包括： 取消信息接收模块， 用于接收呼叫 转接取消信息， 所述呼叫转接取消信息为请求终端恢复呼叫接入正常时所 设置并发送的； 转接取消标识判断模块， 用于判断转接取消标识是否正确， 如果是， 读取呼叫转接取消信息中的目标终端的地址； 地址判断模块， 用 于判断所述目标终端的地址是否正确， 如果是， 读取呼叫转接取消信息中 的取消地址标识； 移除模块， 用于根据所述取消地址标识移除转接终端地 址； 取消成功信息设置模块， 用于当所述目标终端地址正确时， 设置呼叫 转接取消成功信息； 取消成功信息发送模块， 用于将呼叫转接取消成功信 息发送到请求终端， 以便请求终端接收呼叫转接取消成功信息取消呼叫转 接。
本发明所提供的系统， 包括： 本发明所提供的请求终端和本发明所提 供的目标终端。 下面结合附图对具体实施例进行详细说明。
实施例一
图 1所示的是本发明一种实现呼叫转接方法实施例一流程图， 包括： 步骤 101 : 请求终端出现呼叫接入异常时， 设置呼叫转接请求信息并 发送到目标终端。
请求终端呼叫接入异常包括很多种情况。 当遇到如： 离开服务区、 电 池告警和呼叫遇忙等情况时， 请求终端可以自动触发建立呼叫转接请求； 当遇到出差等情况时， 也可以由用户设置建立触发呼叫转接请求。
请求终端在呼叫接入异常时， 设置呼叫转接信息， 具体为设置呼叫转 接请求协议数据帧， 对呼叫转接请求协议数据帧中的各个信息单元进行具 体的定义。
数字移动无线电 （Digital Mobile Radio , DMR)标准中定义了控制信令 块（ Control Signaling Block, CSBK ) 的帧结构， 如图 2所示。 其中， 字节 2~字节 9的 64比特数据可自定义。
图 3为呼叫转接请求协议数据帧结构示意图， 其中， 各信息单元定义 如下:
表 1 所示的是最后一块（Last_Block, LB )信息单元定义， 占用长度 为 1位， 采用 1位二进制码表示。 当 LB的值为 0时， 表示多个控制块的 开头或中间块； 当 LB的值为 1 时， 表示单个控制信令块或多个控制信令 块的最后一块。
表 1 最后一块 LB信息单元定义
Figure imgf000013_0001
表 2所示的是保护标志 （Protect Flag, PF )信息单元定义， 占用长度 为 1位， 采用 1位二进制码表示。 PF的值为 0, 表示预留信息单元。
保护标志 PF信息单元定义
Figure imgf000013_0002
表 3所示的是控制信令操作码（ Control Signalling Block Opcode, CSBK Opcode )信息单元定义，占用长度为 6位，采用 6位二进制码表示。当 CSBK Opcode的值为 110110时，表示为呼叫转接请求控制信令操作码； 当 CSBK Opcode的值为 110111 时， 表示为呼叫转接响应控制信令操作码。 其中， 控制信令操作码可以根据实际情况设置其它的值， 这里不进行限定。
表 3 控制信令操作码 CSBK Opcode信息单元定义
Figure imgf000014_0001
表 4所示的是厂商识别码 ( Manufacturer's Feature set ID, MFID )信 息单元定义， 占用长度为 8位， 采用 8位二进制码表示。 当 MFID的值为 00000000时， 表示为 DMR标准业务的识别码。
表 4 厂商识别码 MFID信息单元定义
Figure imgf000014_0002
表 5所示的是组呼 /单呼（Group or lndicidual, G/I )信息单元定义， 占 用长度为 1位， 采用 1位二进制码表示。 当 G/I的值为 0时， 表示呼叫的 目标地址是单个移动台； 当 G/I的值为 1 时， 表示呼叫的目标地址是一组 移动台。
表 5 组呼 /单呼 G/I信息单元定义 信息单元 长度 值 标注
组呼 /单呼 0 呼叫的目标地址是单个移动台
(Group or 1
Indicidual) 1 呼叫的目标地址是一组移动台 表 6所示的是呼叫转接操作码（ Operate Code, OC )信息单元定义， 占用 长度为 2位， 采用 2位二进制码表示。 当 OC的值为 00时， 表示呼叫转接 建立操作； 当 OC的值为 01时， 表示呼叫转接取消操作。
表 6 呼叫转接操作码 0C信息单元定义
Figure imgf000015_0001
表 7所示的是转接地址数 ( Number of Address, NOA )信息单元定义， 占用长度为 4位， 采用 4位二进制码表示。 当 NOA的值为 0时， 表示源终 端地址是呼叫转接地址； 当 NOA是 1~15中的任意一个数值时， 表示为第 三方终端进行呼叫转接的数目， 第三方终端地址为携带终端地址。
表 7 转接地址数 N0A信息单元定义
Figure imgf000015_0002
表 8所示的是地址信息单元定义， 占用长度为 24位， 采用 24位二进 制码表示。 地址的值为 1~16776415之间的数， 请求终端地址表示呼叫转接 发起方地址； 目标终端地址表示呼叫转接目标方地址， 携带终端地址表示 为第三方多个用户进行呼叫转接的地址。
表 8 地址信息单元定义
Figure imgf000016_0001
当为第三方至少一个移动终端进行呼叫转接时， 还需定义呼叫转接信 息携带协议数据帧， 包括： 中间块协议数据单元 （如图 4所示） 和最后一 块协议数据单元 （如图 5所示） 。
优选的， 本发明最多可为 6个移动终端进行呼叫转接到同一个目标终 端。 其中， 呼叫转接信息携带协议数据帧， 中间块协议数据单元携带有第 四携带终端地址的高 8位信息； 最后一块协议数据单元携带有第四携带终 端地址的氏 16位信息。
将设置好的呼叫转接请求信息通过常规时分多址信道发送到目标终 端。
步骤 102: 目标终端读取呼叫转接请求信息中的呼叫转接标识， 判断 呼叫转接标识是否正确， 如果是， 读取呼叫转接请求信息中的目标终端的 地址。
目标终端读取的呼叫转接标识， 具体为转接请求协议帧中的控制信令 操作码， 即， 按照上述表 3对控制信令操作码的信息单元的定义， 控制信 令操作码 CSBK Opcode的值应为 110110。 目标终端的地址， 按照上述表 8对地址信息单元的定义， 指的是呼叫 转接目标方的地址， 为 1~16776415之间的数。
步骤 103: 目标终端判断所述目标终端的地址是否正确， 如果是， 读 取呼叫转接请求信息中的转接地址标识， 根据所述转接地址标识设置转接 终端地址， 并设置呼叫转接成功响应信息发送到请求终端。
目标终端读取的转接地址标识， 具体为转接请求协议帧中的转接地址 数， 即， 按照上述表 6对转接地址数的信息单元的定义， 当读取的转接地 址数为 0时， 表示请求终端地址是转接终端地址， 读取请求终端地址设置 为转接终端地址； 当读取的转接地址数是 1~15中的任意一个数值时， 表示 为第三方进行呼叫转接的数目， 读取至少一个携带终端地址， 将至少一个 携带终端地址设置为转接终端地址。 例如， 转接地址数为 3 , 则读取 3 个 携带终端地址设置为转接终端地址， 为 3个终端建立呼叫转接。
当呼叫转接标识和目标终端地址都正确时， 设置呼叫转接成功响应信 息， 具体为设置呼叫转接响应协议数据帧， 对呼叫转接响应协议数据帧中 的各个信息单元进行具体的定义。 图 6所示的是呼叫转接响应协议数据帧 结构示意图。
其中， LB的信息单元定义如表 1所示； PF的信息单元定义如表 2所 示； CSBK Opcode的信息单元定义如表 3所示， 即应设置 CSBK Opcode 的值为 110111 ; MFID的信息单元定义如表 4所示。 这里不再赘述。
表 9所示的是响应码（Response Code, RC )信息单元定义， 占用长度 为 8位， 采用 8位二进制码表示。 当 RC的值为 0时， 表示为目标终端允 许接收呼叫转接请求， 即， 呼叫转接成功的响应信息； 当 RC的值为 1时， 表示为目标终端拒绝接收呼叫转接请求， 即， 呼叫转接失败的响应信息。
表 9 响应码 RC信息单元定义
Figure imgf000018_0001
步骤 104: 请求终端接收呼叫转接成功响应信息建立呼叫转接。
当请求终端接收到目标终端发送的呼叫转接成功响应信息时， 请求终 端显示呼叫转接成功。
由上述内容可知， 本发明有如下有益效果：
本发明所提供的一种呼叫转接的方法，请求终端出现呼叫接入异常时， 设置呼叫转接请求信息并发送到目标终端， 目标终端读取呼叫转接请求信 息中的呼叫转接标识， 判断呼叫转接标识是否正确， 如果是， 读取呼叫转 接请求信息中的目标终端的地址， 目标终端判断所述目标终端的地址是否 正确， 如果是， 读取呼叫转接请求信息中的转接地址标识， 根据所述转接 地址标识设置转接终端地址， 并设置呼叫转接成功响应信息发送到请求终 端， 请求终端接收呼叫转接成功响应信息建立呼叫转接； 请求终端将呼叫 转接请求信息直接发送到目标终端， 目标终端验证呼叫转接请求信息的正 确后， 设置转接终端地址和呼叫转接成功响应信息， 并将呼叫转接成功响 应信息发送到请求终端， 建立呼叫转接， 无需通过调度台， 终端之间自行 实现设置呼叫转接。
实施例二
图 7所示的是本发明一种呼叫转接方法实施例二流程图， 与实施例一 相比， 实施例二进一步校验授权信息的正确性， 具体包括：
步骤 701 : 请求终端出现呼叫接入异常时， 设置呼叫转接请求信息并 发送到目标终端。
设置呼叫转接请求信息， 具体为设置呼叫转接请求协议数据帧。 其中， 最后一块 LB、 保护标志 PF、 控制信令操作码 CSBK Opcode, 厂商识别码 MFID、 组呼 /单呼 G/I、 呼叫转接操作码 OC、 转接地址数 NOA和地址信息 单元的定义如实施例一所述， 这里不再赘述。
表 10所示的是授权码 ( Authorization Code, AC )信息单元定义， 占用长 度为 8位， 采用 8位二进制码表示。 授权码的值为 0~255之间的数， 表示 呼叫转接的授权码值。 授权码的设置根据目标终端的不同进行自定义。
表 1 0授权码 AC信息单元定义
Figure imgf000019_0001
请求终端向目标终端发送呼叫转接请求信息的同时进行计时，根据实际需 求设定计时预设阈值。 当计时时间超过预设阈值时，还未接收到目标终端发送 的呼叫转接响应信息，判断重发次数是否用完，如果是，则呼叫转接建立失败； 如果否， 发送触发信号触发重新发送呼叫转接请求信息。
如果请求终端在预设阈值内接收到目标终端返回的呼叫转接成功响应 信息， 表明请求终端呼叫转接建立成功。
如果请求终端在预设阈值内接收到目标终端返回的呼叫转接失败响应 信息或者重新发送呼叫转接请求信息的次数超过预设次数， 表明请求终端 呼叫转接建立失败。 步骤 702: 目标终端读取呼叫转接请求信息中的呼叫转接标识， 判断 呼叫转接标识是否正确， 如果是， 执行步骤 703。
目标终端读取的呼叫转接标识， 具体为转接请求协议帧中的控制信令 操作码， 控制信令操作码的值为 110110表示呼叫转接标识正确。
步骤 703 : 目标终端读取呼叫转接请求信息中的目标终端的地址， 判 断所述目标终端的地址是否正确， 如果是， 执行步骤 704。
目标终端的地址指的是呼叫转接接收方的地址。 目标终端读取呼叫转 接请求信息中的授权码， 具体为转接请求协议帧中的授权码。
步骤 704: 目标终端读取呼叫转接请求信息中的授权信息， 判断授权 信息是否正确， 如果是， 执行步骤 705 ; 如果否， 执行步骤 706。
按照上述表 10对授权码的定义， 授权码为 8位二进制码， 是 0~255之 间的数， 当读取的授权码与目标终端中预设的授权码匹配时， 表示授权码 正确。
步骤 705 : 根据所述转接地址标识设置转接终端地址， 并设置呼叫转 接成功响应信息发送到请求终端。
步骤 706: 设置呼叫转接失败响应信息发送到请求终端。
步骤 707: 请求终端根据所接收呼叫转接响应信息建立呼叫转接。 请求终端接收到呼叫转接成功响应信息时， 表明呼叫转接建立成功。 请求终端接收到呼叫转接失败响应信息时， 表明呼叫转接建立失败。 实施例三
一种呼叫转接取消的方法， 包括：
步骤一、 请求终端恢复呼叫接入正常时， 设置呼叫转接取消信息并发 送到目标终端。
当请求终端恢复网络正常或电量充足等情况时， 设置呼叫转接取消信 息发送到目标终端， 具体为设置呼叫转接取消协议数据帧。
其中， 最后一块 LB、 保护标志 PF、 控制信令操作码 CSBK Opcode, 厂商识别码 MFID、 组呼 /单呼 G/I、 转接地址数 NOA和地址信息单元定义 与实施例一相同， 这里不再赘述。
根据表 6对呼叫转接操作码 OC信息单元的定义， OC的值应设置为
01。
步骤二、 目标终端读取呼叫转接取消信息中的转接取消标识， 判断转 接取消标识是否正确， 如果是， 读取呼叫转接取消信息中的目标终端的地 址。
步骤三、 目标终端判断所述目标终端的地址是否正确， 如果是， 读取 呼叫转接取消信息中的取消地址标识， 根据所述取消地址标识移除转接终 端地址， 并设置呼叫转接取消成功信息发送到请求终端。
步骤四、 请求终端根据呼叫转接取消成功信息取消呼叫转接。
优选的， 进一步的， 当目标地址正确时， 读取呼叫转接取消信息中的 授权信息， 判断授权信息是否正确， 如果是， 读取呼叫转接取消信息中的 取消地址标识， 根据所述取消地址标识移除转接终端地址， 并设置呼叫转 接取消成功信息发送到请求终端。
实施例四
图 8所示的是本发明一种呼叫转接的请求终端实施例四结构示意图， 包括： 请求信息设置模块 801 , 用于出现呼叫接入异常时， 设置呼叫转接请 求信息。
设置呼叫转接请求信息与实施例一相同， 这里不再赘述。
请求信息发送模块 802, 用于将呼叫转接请求信息发送到目标终端， 以便目标终端读取呼叫转接请求信息中的呼叫转接标识， 判断呼叫转接标 识是否正确， 如果是， 读取呼叫转接请求信息中的目标终端的地址， 判断 所述目标终端的地址是否正确， 如果是， 读取呼叫转接请求信息中的转接 地址标识， 根据所述转接地址标识设置转接终端地址， 以及设置并发送呼 叫转接成功响应信息。
响应信息接收模块 803 , 用于接收呼叫转接成功响应信息建立呼叫转 接。
优选的， 呼叫转接的请求终端进一步包括：
计时模块，用于设置呼叫转接请求信息并发送到目标终端后进行计时， 当计时时间超过预设阈值时， 向请求信息发送模块发送触发信号， 所述触 发信号触发请求信息发送模块重新发送呼叫转接请求信息。
实施例五
图 9所示的是本发明一种呼叫转接的目标终端实施例五结构示意图， 包括：
请求信息接收模块 901 , 用于接收呼叫转接请求信息， 所述呼叫转接 请求信息为请求终端出现呼叫接入异常时所设置并发送的。
呼叫转接标识判断模块 902 , 用于判断呼叫转接标识是否正确， 如果 是， 读取呼叫转接请求信息中的目标终端的地址。 目标终端地址判断模块 903 , 用于判断所述目标终端的地址是否正确， 如果是， 读取呼叫转接请求信息中的转接地址标识。
转接终端地址设置模块 904 , 用于根据所述转接地址标识设置转接终 端地址。
转接响应信息设置模块 905 , 用于当所述目标终端的地址正确时， 设 置呼叫转接成功响应信息。
转接响应信息发送模块 906 , 用于将转接成功响应信息发送到请求终 端， 以便请求终端接收呼叫转接成功响应信息建立呼叫转接。
优选的， 转接终端地址设置模块具体包括：
第一地址读取模块，用于读取呼叫转接请求信息中的请求终端的地址； 第一地址设置模块， 将请求终端的地址设置为转接终端地址。
或，
第二地址读取模块， 用于读取呼叫转接请求信息中的至少一个携带终 端地址；
第二地址设置模块， 将至少一个携带终端地址设置为转接终端地址。 优选的， 所述目标终端进一步包括：
授权信息判断模块， 用于目标地址正确时， 读取呼叫转接请求信息中 的授权信息， 判断授权信息是否正确， 如果是， 根据所述转接地址标识设 置转接终端地址；
转接响应信息设置模块， 用于当授权信息正确时， 设置呼叫转接成功 响应信息。
实施例六 图 10 为本发明一种实现呼叫转接取消的请求终端实施例六结构示意 图， 包括：
取消信息设置模块 1001 , 用于恢复呼叫接入正常时， 设置呼叫转接取 消信息。
取消信息发送模块 1002, 用于将呼叫转接取消信息发送到目标终端， 以便目标终端读取呼叫转接取消信息中的转接取消标识， 判断转接取消标 识是否正确， 如果是， 读取呼叫转接取消信息中的目标终端的地址， 判断 所述目标终端的地址是否正确， 如果是， 读取呼叫转接取消信息中的取消 地址标识， 根据所述取消地址标识移除转接终端地址， 以及设置并发送呼 叫转接取消成功信息。
取消成功信息接收模块 1003 , 用于根据呼叫转接取消成功信息取消呼 叫转接。
实施例七
图 11 为本发明一种实现呼叫转接取消的目标终端实施例七结构示意 图， 包括：
取消信息接收模块 1101 , 用于接收呼叫转接取消信息， 所述呼叫转接 取消信息为请求终端恢复呼叫接入正常时所设置并发送的。
转接取消标识判断模块 1102, 用于判断转接取消标识是否正确， 如果 是， 读取呼叫转接取消信息中的目标终端的地址。
地址判断模块 1103 ,用于判断所述目标终端的地址是否正确，如果是， 读取呼叫转接取消信息中的取消地址标识。
移除模块 1104, 用于根据所述取消地址标识移除转接终端地址。 取消成功信息设置模块 1105 , 用于当所述目标终端地址正确时， 设置 呼叫转接取消成功信息。
取消成功信息发送模块 1106, 用于将呼叫转接取消成功信息发送到请 求终端， 以便请求终端接收呼叫转接取消成功信息取消呼叫转接。
实施例八
一种呼叫转接系统， 包括：
本发明所提供的请求终端和本发明所提供的目标终端。
下面结合具体应用场景， 对本发明实施例进行举例说明：
例 1 : 请求终端为 A, 目标终端为 B , 请求终端 A为自身进行呼叫转 接， 呼叫转接的目标终端为 B , 即， 当请求终端 A接入异常时， 自动将呼 叫转接到目标终端 B。
当请求终端 A发生电量耗尽或不在服务区等呼叫继而异常时， 触发呼 叫转接建立请求。 设置呼叫转接请求信息， 即， 呼叫转接请求协议数据帧。 根据实施例一对呼叫转接请求协议数据帧各个信息单元的定义可知， 最后 一块 LB设置为 1 ; 保护标志 PF设置为 0; 控制信令操作码 CSBK Opcode 设置为 110110; 组呼 /单呼 G/I设置为 0,表示建立呼叫转接的对象是单呼； 呼叫转接操作码 OC设置为 0, 表示建立呼叫转接； 转接地址数 NOA设置 为 0, 表示为请求终端自身进行呼叫转接， 请求终端的地址为转接终端地 址； 授权码设置为与目标终端 B匹配的授权码； 请求终端的地址设置为 A 的地址； 目标终端的地址设置为 B的地址。 设置的呼叫转接请求协议数据 帧如图 12所示。
目标终端 B接收到呼叫转接请求信息后， 判断呼叫转接标识， 即， 控 制信令操作码 CSBK Opcode是否正确， 如果是， 读取目标终端的地址。 判 断目标终端的地址是否是目标终端 B的地址， 如果是， 读取授权码。 判断 授权码是否与目标终端 B匹配。 如果 CSBK Opcode正确、 目标终端地址正 确和授权码匹配同时成立， 设置转接终端地址为请求终端 A的地址， 并设 置呼叫转接成功响应信息。 最后一块 LB设置为 1 ; 保护标志 PF设置为 0; 控制信令操作码 CSBK Opcode设置为 110111 ; 响应码设置为 0。 设置的呼 叫转接响应协议数据帧如图 13所示。
如果 CSBK Opcode错误、 目标终端地址错误或授权码不匹配， 则设置 呼叫转接失败响应信息， 响应码设置为 0。
请求终端 A接收到呼叫转接成功响应信息后， 建立呼叫转接成功， 当 请求终端 A接入异常时， 呼叫自动转接目标终端
当请求终端 A恢复呼叫接入正常时， 设置呼叫转接取消信息。 最后一 块 LB设置为 1、 保护标志 PF设置为 0、 控制信令操作码 CSBK Opcode设 置为 110110、 组呼 /单呼 G/I设置为 0、 转接地址数 NOA设置为 0, 表示为 请求终端自身进行呼叫转接取消， 授权码设置为与目标终端 B匹配的授权 码； 请求终端的地址设置为 A的地址； 目标终端的地址设置为 B的地址。 根据表 6对呼叫转接操作码 OC信息单元的定义， OC的值应设置为 01。
目标终端 B接收到呼叫转接取消信息后， 判断转接取消标识， 即， 控 制信令操作码 CSBK Opcode是否正确， 如果是， 读取目标终端的地址。 判 断目标终端的地址是否是目标终端 B的地址， 如果是， 读取授权码。 判断 授权码是否与目标终端 B匹配。 如果 CSBK Opcode正确、 目标终端地址正 确和授权码匹配同时成立， 居所述取消地址标识移除转接终端地址， 并 设置呼叫转接取消成功信息。 最后一块 LB设置为 1 ; 保护标志 PF设置为 0; 控制信令操作码 CSBK Opcode设置为 110111 ; 响应码设置为 0。
请求终端 A接收到呼叫转接取消成功信息后， 取消呼叫转接。
例 2: 请求终端为 C, 目标终端为 D, 请求终端 C为第三终端 E和 F 进行呼叫转接， 呼叫转接的目标终端为 D, 即， 当请求终端 E和 F接入异 常时， 自动将呼叫转接到目标终端 D。
请求终端 C设置呼叫转接请求信息， 即， 呼叫转接请求协议数据帧和 呼叫转接请求携带数据帧。 设置呼叫转接请求协议数据帧， 根据实施例一 对呼叫转接请求协议数据帧各个信息单元的定义可知， 最后一块 LB 设置 为 1 ;保护标志 PF设置为 0;控制信令操作码 CSBK Opcode设置为 110110; 组呼 /单呼 G/I设置为 1 , 表示建立呼叫转接的对象是组呼； 呼叫转接操作 码 OC设置为 0, 表示建立呼叫转接； 转接地址数 NOA设置为 2, 表示为 两个第三方终端 E和 F进行呼叫转接， 终端 E和终端 F的地址为转接终端 地址； 授权码设置为与目标终端 D匹配的授权码； 请求终端的地址设置为 C的地址； 目标终端的地址设置为 D的地址。 设置的呼叫转接请求协议数 据帧如图 14所示。
设置呼叫转接携带协议数据帧， 最后一块 LB设置为 1 ; 保护标志 PF 设置为 0; 控制信令操作码 CSBK Opcode设置为 110110; 将终端 E的地址 设置为第一携带终端地址； 将终端 F的地址设置为第二携带终端地址。 呼 叫转接携带协议数据帧如图 15所示。
目标终端 D接收到呼叫转接请求信息后， 判断呼叫转接标识， 即， 控 制信令操作码 CSBK Opcode是否正确， 如果是， 读取目标终端的地址。 判 断目标终端的地址是否是目标终端 D的地址， 如果是， 读取授权码。 判断 授权码是否与目标终端 D匹配。如果 CSBK Opcode正确、 目标终端地址正 确和授权码匹配同时成立， 设置终端 E和终端 F的地址为转接终端地址， 并设置呼叫转接成功响应信息。 最后一块 LB设置为 1 ; 保护标志 PF设置 为 0; 控制信令操作码 CSBK Opcode设置为 110111 ; 响应码设置为 0。 设 置的呼叫转接响应协议数据帧如图 16所示。
如果 CSBK Opcode错误、 目标终端地址错误或授权码不匹配， 则设置 呼叫转接失败响应信息， 响应码设置为 0。
请求终端 C接收到呼叫转接成功响应信息后， 为第三方终端 E和终端 F建立呼叫转接成功， 当终端 E和终端 F接入异常时， 呼叫自动转接目标 终端 D。
本发明中， 建立呼叫转接取消设置呼叫转接取消信息时， 只需将呼叫 转接取消数据协议帧中的呼叫转接操作码 OC设置为 1 ,其它的设置如实施 例一所述， 这里不再赘述。 每一个移动终端既可以作为请求终端， 也可以 作为目标终端， 因此， 每一个移动终端都有发送呼叫转接请求信息和发送 呼叫转接响应信息的功能， 不进行限制。
例 2中呼叫转接的取消， 可以是请求终端 C为第三方终端 E和终端 F 进行呼叫转接取消， 也可以由第三方终端 E和终端 F进行呼叫转接取消， 这里不进行具体限定。
本发明中， 移动终端可以只作为请求终端或目标终端中的其中一种， 也可以既作为请求终端又作为其他终端的目标终端； 移动终端可以只执行 呼叫转接或呼叫转接取消中的一种， 也可以既能执行呼叫转接也能执行呼 叫转接取消， 这里不进行具体限定。
本发明优选的， 是为对讲机进行呼叫转接， 也可以为其它使用常规时 分多址信道进行通讯的其它移动终端建立呼叫转接， 这里不进行限定。
以上所述仅为本发明的较佳实施例而已， 并不用以限制本发明， 凡在 本发明的精神和原则之内， 所作的任何修改、 等同替换、 改进等， 均应包 含在本发明的保护范围之内。

Claims

权 利 要 求
1、 一种实现呼叫转接的方法， 其特征在于， 所述方法包括： 请求终端出现呼叫接入异常时， 设置呼叫转接请求信息并发送到目标 终端；
目标终端读取呼叫转接请求信息中的呼叫转接标识， 判断呼叫转接标 识是否正确， 如果是， 读取呼叫转接请求信息中的目标终端的地址；
目标终端判断所述目标终端的地址是否正确， 如果是， 读取呼叫转接 请求信息中的转接地址标识， 根据所述转接地址标识设置转接终端地址， 并设置呼叫转接成功响应信息发送到请求终端；
请求终端接收呼叫转接成功响应信息建立呼叫转接。
2、 根据权利要求 1所述的方法， 其特征在于， 转接地址标识为源终端 标识时， 所述根据所述转接地址标识设置转接终端地址为：
目标终端读取呼叫转接请求信息中的请求终端的地址；
将请求终端的地址设置为转接终端地址。
3、 根据权利要求 1所述的方法， 其特征在于， 转接地址标识为旁终端 标识时， 所述根据所述转接地址标识设置转接终端地址为：
目标终端读取呼叫转接请求信息中的至少一个携带终端地址； 将至少一个携带终端地址设置为转接终端地址。
4、 根据权利要求 1所述的方法， 其特征在于， 所述目标终端地址正确 之后进一步包括：
目标终端读取呼叫转接请求信息中的授权信息， 判断授权信息是否正 确， 如果是， 根据所述转接地址标识设置转接终端地址， 并设置呼叫转接 成功响应信息发送到请求终端。
5、 根据权利要求 1-4任意一项所述的方法， 其特征在于， 所述设置呼 叫转接请求信息并发送到目标终端后进一步包括：
请求终端进行计时， 当计时时间超过预设阈值还未接收到呼叫转接成 功响应信息时， 发送触发信号触发重新发送呼叫转接请求信息。
6、 一种实现呼叫转接取消的方法， 其特征在于， 所述方法包括： 请求终端恢复呼叫接入正常时， 设置呼叫转接取消信息并发送到目标 终端；
目标终端读取呼叫转接取消信息中的转接取消标识， 判断转接取消标 识是否正确， 如果是， 读取呼叫转接取消信息中的目标终端的地址；
目标终端判断所述目标终端的地址是否正确， 如果是， 读取呼叫转接 取消信息中的取消地址标识， 居所述取消地址标识移除转接终端地址， 并设置呼叫转接取消成功信息发送到请求终端；
请求终端根据呼叫转接取消成功信息取消呼叫转接。
7、 一种实现呼叫转接的请求终端， 其特征在于， 所述终端包括： 请求信息设置模块， 用于出现呼叫接入异常时， 设置呼叫转接请求信 息；
请求信息发送模块， 用于将呼叫转接请求信息发送到目标终端， 以便 目标终端读取呼叫转接请求信息中的呼叫转接标识， 判断呼叫转接标识是 否正确， 如果是， 读取呼叫转接请求信息中的目标终端的地址， 判断所述 目标终端的地址是否正确， 如果是， 读取呼叫转接请求信息中的转接地址 标识， 根据所述转接地址标识设置转接终端地址， 以及设置并发送呼叫转 接成功响应信息；
响应信息接收模块， 用于接收呼叫转接成功响应信息建立呼叫转接。
8、 根据权利要求 7所述的终端， 其特征在于， 所述终端进一步包括： 计时模块，用于设置呼叫转接请求信息并发送到目标终端后进行计时， 当计时时间超过预设阈值时， 向请求信息发送模块发送触发信号， 所述触 发信号触发请求信息发送模块重新发送呼叫转接请求信息。
9、 一种实现呼叫转接的目标终端， 其特征在于， 所述终端包括： 请求信息接收模块， 用于接收呼叫转接请求信息， 所述呼叫转接请求 信息为请求终端出现呼叫接入异常时所设置并发送的；
呼叫转接标识判断模块， 用于判断呼叫转接标识是否正确， 如果是， 读取呼叫转接请求信息中的目标终端的地址；
目标终端地址判断模块， 用于判断所述目标终端的地址是否正确， 如 果是， 读取呼叫转接请求信息中的转接地址标识；
转接终端地址设置模块， 用于根据所述转接地址标识设置转接终端地 址；
转接响应信息设置模块， 用于当所述目标终端的地址正确时， 设置呼 叫转接成功响应信息；
转接响应信息发送模块， 用于将呼叫转接成功响应信息发送到请求终 端， 以便请求终端接收呼叫转接成功响应信息建立呼叫转接。
10、 根据权利要求 9所述的终端， 其特征在于， 转接地址标识为源终 端标识时， 所述转接终端地址设置模块具体包括：
第一地址读取模块，用于读取呼叫转接请求信息中的请求终端的地址； 第一地址设置模块， 将请求终端的地址设置为转接终端地址。
11、 根据权利要求 9所述的终端， 其特征在于， 转接地址标识为旁终 端标识时， 所述转接终端地址设置模块具体包括：
第二地址读取模块， 用于读取呼叫转接请求信息中的至少一个携带终 端地址；
第二地址设置模块， 将至少一个携带终端地址设置为转接终端地址。
12、 根据权利要求 9任意一项所述的终端， 其特征在于， 所述终端进 一步包括：
授权信息判断模块， 用于目标地址正确时， 读取呼叫转接请求信息中 的授权信息， 判断授权信息是否正确， 如果是， 根据所述转接地址标识设 置转接终端地址；
转接响应信息设置模块， 用于当授权信息正确时， 设置呼叫转接成功 响应信息。
13、 一种实现呼叫转接取消的请求终端， 其特征在于， 所述终端包括： 取消信息设置模块， 用于恢复呼叫接入正常时， 设置呼叫转接取消信 息；
取消信息发送模块， 用于将呼叫转接取消信息发送到目标终端， 以便 目标终端读取呼叫转接取消信息中的转接取消标识， 判断转接取消标识是 否正确， 如果是， 读取呼叫转接取消信息中的目标终端的地址， 判断所述 目标终端的地址是否正确， 如果是， 读取呼叫转接取消信息中的取消地址 标识， 根据所述取消地址标识移除转接终端地址， 以及设置并发送呼叫转 接取消成功信息； 取消成功信息接收模块， 用于根据呼叫转接取消成功信息取消呼叫转 接。
14、 一种实现呼叫转接取消的目标终端， 其特征在于， 所述终端包括： 取消信息接收模块， 用于接收呼叫转接取消信息， 所述呼叫转接取消 信息为请求终端恢复呼叫接入正常时所设置并发送的；
转接取消标识判断模块， 用于判断转接取消标识是否正确， 如果是， 读取呼叫转接取消信息中的目标终端的地址；
地址判断模块， 用于判断所述目标终端的地址是否正确， 如果是， 读 取呼叫转接取消信息中的取消地址标识；
移除模块， 用于根据所述取消地址标识移除转接终端地址；
取消成功信息设置模块， 用于当所述目标终端地址正确时， 设置呼叫 转接取消成功信息；
取消成功信息发送模块， 用于将呼叫转接取消成功信息发送到请求终 端， 以便请求终端接收呼叫转接取消成功信息取消呼叫转接。
15、 一种实现呼叫转接的系统， 其特征在于， 所述系统包括： 权利要求 7-8任意一项所述的请求终端和权利要求 9-12任意一项所述 的目标终端；
或
权利要求 13所述的请求终端和权利要求 14所述的目标终端。
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