WO2007101386A1 - Procédé et système pour envoyer des smd dans un faisceau de lignes - Google Patents

Procédé et système pour envoyer des smd dans un faisceau de lignes Download PDF

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Publication number
WO2007101386A1
WO2007101386A1 PCT/CN2007/000282 CN2007000282W WO2007101386A1 WO 2007101386 A1 WO2007101386 A1 WO 2007101386A1 CN 2007000282 W CN2007000282 W CN 2007000282W WO 2007101386 A1 WO2007101386 A1 WO 2007101386A1
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WIPO (PCT)
Prior art keywords
short data
listener
smd
message
uplink
Prior art date
Application number
PCT/CN2007/000282
Other languages
English (en)
French (fr)
Inventor
Zhiqiang Hou
Mingyang Dai
Haiquan Zhong
Zhifeng Lu
Minjun Shen
Changdong Yang
Lili Dai
Shuliang Gao
Original Assignee
Huawei Technologies Co., Ltd.
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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to EP07702200A priority Critical patent/EP1901566B1/en
Priority to AT07702200T priority patent/ATE472234T1/de
Priority to AU2007222811A priority patent/AU2007222811B2/en
Priority to CN2007800002999A priority patent/CN101317469B/zh
Priority to DE602007007266T priority patent/DE602007007266D1/de
Priority to CA2616074A priority patent/CA2616074C/en
Publication of WO2007101386A1 publication Critical patent/WO2007101386A1/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
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/10—Push-to-Talk [PTT] or Push-On-Call services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • H04W76/45—Connection management for selective distribution or broadcast for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/08—Trunked mobile radio systems

Definitions

  • the present invention relates to a cluster group call technology in a communication system, and more particularly to a method and system for transmitting short data in a cluster group. Background of the invention.
  • GSM Global System for Mobile Communications
  • GSM-R the GSM system that serves the railway
  • GSM-R provides a common communication platform for railway workers to serve as a railway control system to meet the current and future needs of the railway network. It is a system facility designed, built and used directly for railway transportation production and railway information services. It mainly performs functions such as railway dispatching communication, station communication, emergency communication, section communication, official communication, and transportation information transmission.
  • the GT800 digital trunking system is based on the GSM system and uses a network structure similar to GSM, adding a variety of application processing platforms for the industry.
  • the GT800 system adds nodes for command and dispatch applications on the GSM infrastructure network, such as the Function Number Node (FFN) and the Group Call Register (GCR).
  • the queue device is added to facilitate the dispatching station to access the network, providing more flexible support for the command scheduling application.
  • the GT800 system refers to the business functions of various mature digital trunking systems and the business characteristics of the GSM network, forming a GT800-specific digital trunking service system.
  • the GT800 can be applied to command and dispatch services such as group calls, dispatcher check calls, list inquiry calls, private calls, voice broadcasts, and the like.
  • the group call has two different uplink occupation modes: 1.0 uplink occupation mode and 1.5 uplink occupation mode.
  • 1.0 uplink occupation mode The speaker occupies the group call uplink channel of the cluster group.
  • the group call channel of the cluster group of the speaker is busy on the uplink; in the 1.5 uplink occupancy mode, the speaker occupies the speaker dedicated channel in the cluster group.
  • the group call channel of all the cells of the cluster group to which the speaker belongs is idle, and the listener can initiate the preemption uplink through the group call channel of all the cells of the cluster group to which the speaker belongs.
  • short data that is, data and voice simultaneous transmission
  • the data herein refers to short data, which is generally a fixed short message
  • the information content is predefined, and generally supports short messages within 256.
  • BIT bits
  • the short data transmission delay requirement is short, typically within 500 milliseconds (ms).
  • Embodiments of the present invention provide a method and system for transmitting short data in a cluster group, which can send short data in a cluster group of 1.5 uplink occupying mode and allowing push-to-talk (PTT) push preemption. , to achieve simultaneous interpretation of short data and voice.
  • PTT push-to-talk
  • a method for transmitting short data in a cluster group comprising:
  • the short data is sent to the network side of the wireless communication system through the occupied speaker dedicated channel; when the short data is sent, the short data is sent through the group call channel of the cluster group of the cell in the uplink.
  • the short data is sent to the network side of the wireless communication system;
  • the network side of the wireless communication system After receiving the short data sent by the speaker or the listener, the network side of the wireless communication system broadcasts the short data.
  • a system for transmitting short data in a cluster group includes a terminal and a network side device in the cluster group, where
  • a terminal a group call channel for passing a dedicated channel occupied by a occupied channel or a cluster group of a cell in which the cell is located Sending short data to the network side device on the uplink;
  • the network side device is configured to receive short data sent by the terminal and broadcast the short data.
  • the embodiment of the present invention re-defines the message that the speaker or the listener of the cluster group sends the short data.
  • the network side of the wireless communication system receives the message sent by the speaker or the listener, the message is identified for the short data sending process.
  • the short data sent by the speaker or listener is broadcast in the cluster group.
  • the short data transmission process and the cluster group voice transmission process or the cluster group preemption uplink are set to two independent processes, and the extended access pulse (AB) is adopted when the listener sends the short data.
  • the method for enabling the wireless communication system network side to recognize that the received message is a short data request uplink, thereby broadcasting the received short data in the cluster group.
  • the method and system provided by the embodiments of the present invention can be uplinked at 1.5.
  • Short data is sent in the cluster group that occupies the mode and allows the PTT to preempt, and the simultaneous transmission of short data and voice is realized.
  • FIG. 1 is a flowchart of a method for a short data transmission by a speaker according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for transmitting short data across a BSC according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a method for a short data sent by a speaker to a designated listener according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a listener according to an embodiment of the present invention. Flow chart of short data method
  • FIG. 5 is a flowchart of a method for a listener to send short data across a BSC according to an embodiment of the present invention
  • FIG. 6 is a flowchart of a method for a listener to send short data to a designated receiver according to an embodiment of the present invention
  • the method provided by the embodiment of the present invention can be used in the 1.5 uplink occupation mode and allows the PTT to be robbed.
  • the transmission of short data within the cluster group does not interrupt the transmission of voice, that is, short data and voice broadcast simultaneously.
  • simultaneous transmission of short data and voice is implemented in a cluster group of 1.5 uplink occupation mode and allowing for preemption.
  • the speaker can transmit short data through the occupied speaker dedicated channel when transmitting short data when the short channel is occupied by the speaker; the listener passes the cluster group of the cell in the cell.
  • the group call channel transmits short data uplink, that is, by augmenting the AB message, the short data is sent upstream by using the group call channel of the cluster group.
  • the listener sends short data, it needs to occupy the group call channel uplink of the cluster group.
  • the uplink occupation should be distinguished from the normal uplink occupation, so as to avoid affecting the speaker dedicated channel uplink.
  • the speaker or other listener is normally occupied by the uplink. Therefore, the embodiment of the present invention defines an extended AB message, so that the network side of the wireless communication system with the group call function knows that the current uplink is short data when receiving the extended AB message.
  • the present invention determines whether the listener sends the short data or the speaker sends the message carrying the short data, in order to enable the network side of the wireless communication system to know the received message carrying the short data when receiving the short data, the present invention
  • the embodiment defines a message carrying short data.
  • the short data is broadcasted through the descendant of the speaker dedicated channel and the group call channel of the cluster group.
  • the cluster group call has been established.
  • the speaker in the cluster group resides on the speaker-specific channel, and the voice is sent to the network side of the wireless communication system through the speaker-specific channel.
  • the network side of the wireless communication system passes the speaker.
  • the group call channel of the cluster group broadcasts the voice sent by the speaker to the listener.
  • the speaker needs to send the short data, and the short data is carried in the layer 3 message, and is sent to the network side of the wireless communication system through the speaker dedicated channel, and the short data carried by the message on the network side of the wireless communication system is in the speaker.
  • the group call channel of the cluster group is down and the speaker is dedicated. The letter is broadcasted downstream.
  • the network entity involved in the method includes a mobile station (MS), a base transceiver station (BTS) on the network side of the wireless communication system, and a BSC, where the MS is The speaker in the cluster group, the BTS is the BTS of the speaker's cell, and the BSC is the BSC of the speaker's cell.
  • MS mobile station
  • BTS base transceiver station
  • BSC BSC
  • Step 100 The MS sends a Layer 3 message frame (I frame), that is, a short data service request (SMD Service Request), to the BTS through the speaker dedicated channel, and carries the short data.
  • I frame Layer 3 message frame
  • SMS Service Request short data service request
  • the speaker dedicated channel uplink may be a fast associated control channel (FACCH) uplink.
  • FACCH fast associated control channel
  • the SMD Service Request can also carry the identity of the MS, such as the MS International Mobile Subscriber Identity (IMSI).
  • IMSI International Mobile Subscriber Identity
  • Step 101 The BTS forwards the SMD Service Requsst to the BSC by using a data indication (DATAIND) message.
  • DATAIND data indication
  • Step 102 After receiving the SMD Service Request, the BSC obtains the short data carried by the BSC, and carries the short data in the short data service notification (SMD Notification) message, and the downlink of the group call channel of the cluster group where the MS is located and the speaker dedicated channel downlink Broadcast.
  • SMS Notification short data service notification
  • the group call channel and the speaker dedicated channel for broadcasting short data may be FACCH.
  • the BSC can administer multiple cells, and when broadcasting an SMD Notification message, it will broadcast in the cell of the cluster group in which all MSs under the BSC are located.
  • the SMD Notification message can also carry the identity of the MS, such as the International Mobile Subscriber Identity (IMSI) of the MS.
  • IMSI International Mobile Subscriber Identity
  • Step 200 The MSI sends an SMD Service Request to the BTS1 through the speaker dedicated channel, and carries the short data.
  • the speaker dedicated channel uplink can be FACCH uplink.
  • the SMD Service Request can also carry the identity of the MS.
  • Step 201 The BTS1 forwards the SMD Service Requesto to the BSC by using the DATA IND message.
  • Step 202 The BSC1 forwards the SMD Service Requesto to the MSC1 by using a short data service report (SMD REPORT) message.
  • SMS REPORT short data service report
  • Steps 203 to 204 After receiving the SMD Service Request, the MSC1 obtains the short data carried, and sends the short data in the short data service notification (SMD NOTIFY) message to the BSC1 and the MSC2.
  • SMS NOTIFY short data service notification
  • the SMD NOTIFY message is different from the SMD Notification message in that the SMD NOTIFY message is an uplink message, and the SMD Notification message is a downlink message.
  • Step 205 The MSC2 forwards the received SMD NOTIFY message to the BSC2.
  • the BSC on the network side of the cluster system is provided with an identifier for forwarding short data.
  • the BSC receives the short data, it determines, according to the identifier, that the short data is broadcasted in the area under the jurisdiction of the BSC. Still further sent to the MSC, the MSC broadcasts short data in the area under its jurisdiction.
  • the MSC when the MSC sends short data to the BSC, it is also sent to the set with short forwarding.
  • the BSC of the data identification when the MSC sends short data to the BSC, it is also sent to the set with short forwarding.
  • the speaker can also specify a certain listener in the cluster group when sending short data, which not only avoids the influence of short data on the speaker-dedicated channel, such as FACCH voice quality, but also avoids short The data interferes with other listeners who are receiving voice over the group call channel of the cluster group.
  • the method that the speaker specifies to receive a listener in the cluster group when transmitting the short data is different from the method described in FIG. 1 in that the speaker also carries the designated listener identifier when transmitting the short data to the network side of the cluster system.
  • the designated listener identifier indicates the listener to which the short data is transmitted.
  • the cluster system network side determines the region of the listener having the designated listener identifier, and broadcasts the short data in the determined region.
  • the network entity involved in the method includes an MS, a BTS, a BSC, and a core network (NSS) on the network side of the wireless communication system, where the MS is The speaker in the cluster group, the BTS is the BTS of the cell where the speaker is located, the BSC is the BSC of the speaker's cell, the NSS is the NSS of the cluster group that governs the speaker, and the entity in the NSS includes multiple MSCs and visited locations.
  • Register (VLR) message forwarding between MSGs in NSS, the specific steps are:
  • Step 300 The MS sends a Layer 3 message frame (I frame), that is, an SMD Service Request, to the BTS through the speaker dedicated channel, and carries the short data and the specified listener identifier.
  • I frame Layer 3 message frame
  • the designated listener identity may be the IMSI of the specified listener or the mobile subscriber integrated service digital network number (MSISDN) of the designated listener.
  • MSISDN mobile subscriber integrated service digital network number
  • Step 301 The BTS forwards the SMD Service Rsqusst to the BSC by using a DATA IND message.
  • Step 302 The BSC forwards the SMD Service Request to the NSS by using an SMD REPORT message.
  • Step 303 After receiving the SMD Service Request, the NSS obtains the short number carried And determining the listener identifier, determining the region of the listener having the bearer identifier, carrying the short digit oscillator and the designated listener identifier in the SMD NOTIFY message and sending the BSC to the jurisdiction determined area (the BSC in FIG. 3) It is the BSC where the MS is located.
  • the NSS When the NSS receives the SMD Service Request, it determines whether the specified listener ID is carried. If not, the short data is carried in the SMD Notification message by the BSC according to the method described in FIG. 2; if yes, due to the NSS
  • the MSC and the VLR are included, and the MSC and the VLR interact according to the prior art to verify whether the listener with the specified listener identity has signed the cluster group where the MS is located, and if so, finds the designated listener according to the prior art. In the area where the identified listener is located, the short data is carried in the SMD NOTIFY message and sent to the BSC that determines the determined area. Otherwise, the NSS discards the SMD Service Request.
  • Step 304 The BSC that determines the determined area carries the short data and the specified listener identifier in the SMD Notification message, and broadcasts in the jurisdiction area through the group call channel of the cluster group (shown in FIG. 3 as the set through the MS). The group's group call channel downlink and the speaker dedicated channel downlink are broadcasted).
  • the short data is not broadcast downstream through the speaker-specific channel.
  • the group call channel uplink of the cluster group is idle, and the listener can be in the group call channel of the cluster group of the cell in the cell.
  • the extended AB message carries a cause value, and the group call channel of the cluster group requesting to occupy the listener is used to send short data, and then passes through the group of the cluster group of the occupied listener cell.
  • the call channel sends short data.
  • the extended AB message When the extended AB message carries 0110, it indicates that the group call channel uplink requesting to occupy the cluster group of the cell where the listener is located is used to send short data.
  • the embodiment of the present invention may also set other binary numbers in the extended AB message, as long as the network side of the wireless communication system can identify that the binary number carried in the extended AB message indicates that the request occupies the cluster of the cell where the listener is located according to a preset rule.
  • the group call channel uplink is used to send short data.
  • the embodiment of the present invention uses the extended AB message, and has the following advantages: First, the uplink occupation of the short data is completely separated from other preemptive uplinks, and accordingly, the network side of the wireless communication system determines that the broadcast is short after receiving the extended AB message. Second, for the uplink occupation of short data, it is not necessary to report the uplink request (UPLINK REQ) message to the MSC on the network side of the wireless communication system, and does not affect the voice of the speaker in the group call in the cluster group.
  • UPLINK REQ uplink request
  • the BSC on the network side of the wireless communication system can separately process the cell to which the listener belongs, and the listener sends the extended AB message in the cell to which the listener belongs and the short data does not affect other groups in the cluster group.
  • the area does not need to extend the short data message.
  • the network entity involved in the method includes an MS, a BTS on the network side of the wireless communication system, and a BSC, where the MS is a listener in the cluster group, and the BTS is The BTS of the cell where the listener is located, and the BSC is the BSC of the cell where the listener is located.
  • the specific steps are as follows:
  • the BTS sends a group call channel uplink free (Uplink Free) message of the cluster group in the jurisdiction cell.
  • Uplink Free uplink free
  • the BTS sends an Uplink Free message as long as the speaker of the cluster group is speaking through the speaker dedicated channel, as long as no MS occupies the group call channel uplink of the cluster group.
  • Step 401 The MS sends an uplink subscription (Uplink Access) message, requesting to use the group call channel of the cluster group in the cell to send short data, and the Uplink Access message is an extended AB message, where the reason value of the definition of the present invention is required to indicate The group call channel uplink that occupies the cluster group is used to send short data.
  • Uplink Access uplink subscription
  • Step 402 The BTS sends a short data detection (Data Detect) message to the BSC, and is used to notify the BSC that the MS wants to occupy the group call channel of the cluster group of the MS where the MS is located to send short data.
  • Data Detect short data detection
  • the message structure of the Data Detect message is the same as that of the Talker Detect message sent by the BTS to the BSC when the prior art listener initiates the uplink preemption. However, the BSC processes the Data Detect message and processes the Talker Detect message. Different: There is no need to exchange messages with the MSC, thus avoiding the transmission of short data and affecting the voice transmission by the speakers in the cluster group.
  • Step 403 The BTS sends a response (Uplink Grand) of the uplink occupation message to the MS.
  • SABM Asynchronous Balanced Mode
  • the SABM message is a layer three message.
  • Step 405 The BTS sends a response (UA) of the SABM message to the MS.
  • Step 406 The BTS sends a link establishment indication (EST IND) message to the BSC, where the message carries the SMD Service Request sent by the MS.
  • EST IND link establishment indication
  • steps 405 and 406 can be reversed.
  • Step 407 The BSC broadcasts the uplink group call channel busy in the current cell of the MS (Uplink The Busy message is used to indicate that the group call channel of the cluster group is busy in the cell where the MS is currently located.
  • the BSC' sends an Uplink Busy in all the cells of the cluster group under the jurisdiction, and the short data request uplink of the present invention, the BSC sends the Uplink Busy only in the current cell of the MS, so that the cluster
  • the short data sent by different groups of cells is independent of each other, and also avoids sending short data to affect short data requests of other cells to uplink or preempt uplink.
  • Step 408 The BSC sends an uplink release (Uplink Release) message to the MS through the group call channel, and releases the group call channel uplink occupied by the MS.
  • Uplink Release Uplink Release
  • Step 409 The BSC sends a release request (REL REQ) to the BTS, instructing the BTS to release the group call channel uplink occupied by the MS.
  • REL REQ release request
  • Step 410 After releasing the uplink of the group call channel occupied by the MS, the BTS sends a release confirmation (REL CNF) to the BSC, and confirms that the group call channel uplink occupied by the MS has been released.
  • REL CNF release confirmation
  • Step 411 The BSC broadcasts an uplink call channel idle (Uplink Free) message in the current cell of the MS, and indicates that other MSs and MSs in the current cell of the MS can initiate short data request uplink or preemptive uplink.
  • uplink call channel idle Uplink Free
  • Step 412 The BSC broadcasts an SMD Notification message in all cells of the cluster group under the jurisdiction, and the SMD Notification message carries short data.
  • the broadcast of the BSC in all cells of the cluster group under the jurisdiction is actually downlinked on the downlink of the group call channel and the downlink of the speaker dedicated channel in the cluster group.
  • the SMD Notification message can also carry the IMSI of the MS.
  • the BSC can administer multiple cells, and when broadcasting an SMD Notification message, it will broadcast in the cell of the cluster group in which all MSs under the BSC are located.
  • BSC1 and BTS1 are MS1, that is, the SC and BTS to which the listener belongs;
  • BSC2 and BTS2 are another BSC and BTS that govern the area where the cluster group is located.
  • MS2 is another listener or speaker of the cluster group under the jurisdiction of BSC'2.
  • MSC1 governs BSC1 and MSC2 governs BSC2.
  • the specific steps are :
  • Step 500 The BTS1 sends an Uplink Free message of the cluster group in the jurisdiction cell.
  • the group call channel uplink of the cluster group is used to send short data.
  • Step 502 The BTS1 sends a Data Detect message to the BSC 1 to notify the BSC1 that the MS1 wants to occupy the group call channel uplink short data of the cluster group of the cell where the MS1 is located.
  • the message structure of the Data Detect message is the same as that of the Talker Detect message sent by the BTS to the BSC when the uplink listener initiates the uplink preemption.
  • the process of processing the Data Detect message by the BSC1 is different from the process of processing the Talker Detect message:
  • the message exchange with MSC1 avoids the transmission of short data and affects the voice transmission performed by the speaker in the cluster group.
  • Step 503 BTS1 sends Uplink Grand to MS1.
  • Step 504 The MSI sends an SABM message to the BTS1, where the message carries an SMD Service Request, and the SMD Service Request includes short data and an IMSI of the MSI.
  • the SABM message is a layer three message.
  • Step 505 The BTS1 sends the UA of the SABM message to the MS1.
  • Step 506 The BTS1 sends an EST IND message to the BSC1, where the message carries the SMD Service Request sent by the MS1.
  • Step 507 The BSC1 forwards the SMD Service Request to the MSC1 by using the SMD REPORT message.
  • Step 508 The BSC1 broadcasts an Uplink Busy message in the cell where the MSI is currently located, where Indicates that the group call channel of the cluster group is busy in the cell where the MSI is currently located.
  • Step 509 The BSC 1 sends an Uplink Release message to the MS 1 through the group call channel, and the group call channel occupied by the MS1 is uplinked.
  • Step 510 The BSC1 sends a REL REQ to the BTS1, instructing the BTS1 to release the group call channel uplink occupied by the MS1.
  • Step 511 After releasing the uplink of the group call channel occupied by the MS1, the BTS1 sends a REL CNF to the BSC1, and confirms that the group call channel uplink occupied by the MS1 is released.
  • step 512 BSC1 broadcasts an Uplink Free message in the cell where MS1 is currently located, indicating that other MSs and MSIs in the current cell of MS1 can initiate short data request uplink or preemptive uplink.
  • Steps 513-514 After receiving the SMD Service Request, the MSC1 obtains the short data carried, and carries the short data in the SMD NOTIFY message and sends the data to the BSC 1 and the MSC2.
  • Step 515 The MSC2 forwards the SMD NOTIFY message to the BSC2.
  • step 516 to step 517 the BSC1 broadcasts the received short data carried in the SMD NOTIFY message through the group call channel downlink of the cluster group and the speaker dedicated channel downlink by using the SMD Notification message; the BSC2 will receive the received data.
  • the short data in the SMD NOTIFY message is broadcasted by the SMD Notification message through the group call channel of the governed cluster group.
  • the BSC on the network side of the cluster system is provided with an identifier for whether to send the short data to the MSC.
  • the BSC receives the short data, it determines whether it is within the area under the jurisdiction of the BSC. Broadcast short data is further sent to the MSC, which broadcasts short data in the area under its jurisdiction.
  • the listener can also specify other listeners or speakers in the cluster group when sending short data, which not only avoids the influence of short data on the speaker-specific channel, such as FACCH voice quality. And avoid short data to the group call channel that is passing through the cluster group Interference generated by other listeners receiving speech.
  • the method for the listener to specify a listener in the cluster group when sending the short data is different from the method described in FIG. 4 in that the listener also carries the designated receiver identifier when transmitting the short data to the network side of the cluster system. Specifying the receiver identifier to indicate the listener or speaker to which the short data is sent. After receiving the designated receiver identifier, the network side of the cluster system determines the region of the listener or speaker having the designated recipient identifier, in the determined area. Broadcast short data.
  • FIG. 6 is a flowchart of a method for a listener to send short data to a designated receiver according to an embodiment of the present invention.
  • the network entity involved in the method includes an MS, a BTS, a BSC, and an NSS on the network side of the wireless communication system, where the MS is in the cluster group.
  • the listener, the BTS is the BTS of the cell in which the listener is located, the BSC is the BSC of the cell in which the listener is located, the NSS is the NSS in which the cluster group governing the listener is located, and the entities in the NSS include the MSC and the VLR, and the MSC in the NSS Message forwarding can also be performed between them.
  • the specific steps are as follows:
  • Step 600 The BTS sends an Uplink Free message of the cluster group in the jurisdiction cell.
  • Step 601 The MS sends an Uplink Access message, requesting that the group call channel of the cluster group occupying the cell in the cell send the short data uplink.
  • Step 602 The BTS sends a Data Detect message to the BSC.
  • Step 603 The BTS sends an Uplink Grand to the MS.
  • Step 604 The MS sends an SABM message to the BTS, where the message carries an SMD Service Request, where the SMD Service Request includes the short data and the identifier of the receiver.
  • Step 605 The BTS sends the UA to the MS.
  • Step 606 The BTS sends an EST IND message to the BSC, where the message carries the SMD Service Request sent by the MS.
  • steps 605 and 606 can be reversed.
  • Step 607 The BSC sends an SMD REPORT message to the NSS, where the message carries the SMD Service Request sent by the MS.
  • the NSS receives the SMD Service Request, it determines whether the specified listener ID is carried. If not, the short data is carried in the SMD Notification message by the BSC according to the method described in FIG. 5; if yes, due to the NSS
  • the MSC and the VLR are included, and the MSC and the VLR interact according to the prior art to verify whether the listener or the speaker with the specified receiving identifier has signed the cluster group where the MS is located, and if so, finds the designated according to the prior art.
  • the listener identifies the area where the listener is located. Otherwise, NSS will drop the SMD Service Request.
  • Step 6Q8 The BSC broadcasts an Uplink Busy message in the cell where the MS is currently located.
  • Step 609 The BSC sends an Uplink Release message to the MS through the group call channel.
  • Step 611 After releasing the group call channel occupied by the MS, the BTS sends the REL CNF 0 to the BSC.
  • Step 612 The BSC broadcasts an Uplink Free message in the cell where the MS is currently located.
  • Step 613 The NSS carries the short data and the specified listener identifier in the SMD NOTIFY message to the BSC that determines the determined area (in FIG. 6 the BSC is where the MS is located)
  • Step 614 The BSC that determines the determined area carries the short data and the specified listener identifier in the SMD Notification message, and broadcasts in the jurisdiction area through the group call channel of the cluster group (shown in FIG. 6 as the set through the MS).
  • the group's group call channel downlink and the speaker dedicated channel downlink are broadcasted).
  • the short data is not broadcast downstream through the speaker-specific channel.
  • the MSC in the NSS can only determine the area where the listener with the specified listener identifier is currently located through the prior art location update, and cannot accurately determine the current location of the listener with the specified listener identifier. Cell, so NSS can only carry short data in The SMD NOTIFY message is sent to the BSC that governs the determined area.
  • the listener or the speaker of the cluster group when the listener or the speaker of the cluster group receives the SMD Notification message, it first determines whether the SMD Notification message carries the specified recipient identifier, and if not, receives the short data carried; if yes, Then, it is determined whether the specified recipient identifier carried by the user is consistent with the self-set, and if so, the short data carried is received; if not, the SMD Notification message is discarded.
  • the embodiment of the present invention also provides a function of BSC re-broadcasting SMD Notification messages.
  • the number and interval of re-broadcasting SMD Notification messages are set in the BSC, and the range of re-broadcast times can be set to 0 to 5, and 0 indicates that the child broadcast is not required.
  • the retransmission interval can be set from 1 to 10 in units of hundred ms.
  • the BSC can also perform a default re-broadcast. In the default re-broadcast, the interval is 500ms, and the SMD Notification message is re-broadcast twice.
  • FIG. 7 is a flowchart of a method for resending short data according to an embodiment of the present invention.
  • the network entity involved in the method includes a BSC and a BTS on the network side of the wireless communication system, and a listener or speaker of the cluster group, and the specific steps are as follows:
  • Step 700 The BSC receives the short data of a cluster group sent by the listener or the speaker forwarded by the BTS, and broadcasts the short data in the cluster group by using the steps in FIG. 1 or FIG. 2, and is the cluster.
  • the group caches short data and records the actual number of rebroadcasts to zero.
  • Step 701 The BSC starts a timer according to the configured re-broadcast interval. When the timer expires and re-broadcasts the SMD Notification message carrying the buffered short data, the actual re-broadcast frequency is updated.
  • the timer is a cluster group call level, and a timer is set in the BSC for each cluster group.
  • Step 702 The BSC determines whether the actual number of re-broadcast times has reached the set number of re-broadcasts. If yes, go to step 703; otherwise, go to step 704. Step 703: The BSC releases the buffered short data and ends.
  • Step 704 proceeding to step 701 to continue execution.
  • the BSC stops the timer and releases the buffered short data, buffers the received new short data and executes according to the steps described in FIG.
  • a cluster that allows 1.5 PTT preemption and implements PTT preemption can be implemented.
  • the group of the group calls the downlink data of the downlink and the simultaneous transmission of the voice, and the speaker in the cluster group that implements the 1.5 uplink occupant and allows the PTT to preempt the simultaneous transmission of the speaker or the listener in the cluster group during the speech process. Short data.
  • the embodiment of the present invention further provides a system for transmitting short data in a cluster group, the system comprising a terminal and a network side device in the cluster group, wherein the terminal is configured to pass the occupied dedicated channel or the occupied cell
  • the group call channel uplink of the cluster group sends the short data to the network side device, and the network side device is configured to receive the short data sent by the terminal and broadcast the short data.
  • the short data is sent through the occupied dedicated channel; when the terminal is currently a listener in the cluster group, the passing cell
  • the group call channel of the cluster group sends short data uplink.

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Description

一种在集群组内发送短数据的方法及系统 技术领域
本发明涉及在通信系统的集群组组呼技术， 特别涉及一种在集群組 内发送短数据的方法及系统。 发明背景.
全球移动通信系统（GSM )是 1992年欧洲标准化委员推出的标准， 其采用数据通信技术以及统一的网络标准， 使通信膚量得以保证， 并可 以开发出更多的新业务供用户使用。
GSM-R, 即服务铁路的 GSM系统， GSM-R为铁路工作人员提供一 个通用的通信平台， 可作为铁路控制系统， 以满足铁路网络目前以及将 来不断发展的需求。 它是直接为铁路运输生产和铁路信息化服务而设 计、 组建并使用的系统设施， 主要完成铁路调度通信、 站场通信、 应急 通信、 区段通信、 公务通信、 运输信息传输等功能。
GT800数字集群系统以 GSM系统为基础，采用与 GSM类似的网络 结构， 增加了针对亍业用户的多种应用处理平台。 GT800系统在 GSM 基础网络上增加了方便指挥调度应用的节点， 如功能号码节点 （FFN )、 组呼寄存器（GCR )等。 增加了排队机设备便于调度台接入网络， 为指 挥调度应用提供更灵活的支持。 GT800系统参考各类成熟数字集群系统 的业务功能和 GSM网络自身业务特性， 形成了 GT800特有的数字集群 业务体系。 GT800可应用于诸如組呼、调度台核查呼叫、列表查询呼叫、 私密呼叫、 语音广播之类的指挥调度业务。
在 GT800数字集群系统或 GSM-R中， 组呼有两种不同的上行占用 方式: 1.0上行占用方式和 1.5上行占用方式。 在 1.0上行占用方式下, 讲者占用集群组的组呼上行信道， 有讲者时， 讲者所在小区的集群组的 组呼信道上行忙； 在 1.5上行占用方式下， 讲者占用集群组内讲者专用 信道， 有讲者时， 讲者所属集群组的所有小区的组呼信道上行空闲， 听 者可以通过讲者所属集群组的所有小区的组呼信道上行发起抢占上行。
但是， 目前基于 GSM技术的具有组呼功能的无线通信系统中， 尚 未在 1.5上行占用方式下实现讲话过程中同时传送短数据， 即数据和语 音同传。 由此无法实现需要数据和语音同传的业务， 其中， 这里的数据 是指短数据，这种短数据一般为固定的很短的信息，信息内容预先定义， 一般支持 256条以内的短信息， 通过小于 8比特（BIT ) 的编码实现， 短数据传送时延要求短， 一般在 500毫秒（ms ) 以内。 发明内容
本发明实施例提供一种在集群组内发送短数据的方法及系统， 该方 法能够在 1.5上行占用方式且允许即按即讲（PTT, push to talk )抢占的 集群组内发送短数据， 实现短数据和语音的同传。
本发明实施例是这样实现的：
一种在集群組内发送短数据的方法， 该方法包括：
讲者发送短数据时， 将短数据通过所占用的讲者专用信道上行发送 给无线通信系统网络侧； 听者发送短数据时， 将短数据通过所在小区的 集群組的组呼信道上行发送给无线通信系统网络侧；
无线通信系统网络侧接收到讲者或听者发送的短数据后， 广播短数 据。
一种在集群组内发送短数据的系统， 该系统包括集群组内的终端和 网络侧设备， 其中，
终端， 用于通过所占用的专用信道或所在小区的集群组的组呼信道 上行将短数据发送给网絡侧设备；
网络侧设备， 用于接收终端发送的短数据并广播所述短数据。
本发明实施例重新定义集群组的讲者或听者发送短数据的消息， 当 无线通信系统网络侧接收到讲者或听者发送的消息时， 识别出该消息用 于短数据的发送流程， 则将讲者或听者发送的短数据在集群组内进行广 播。 由于本发明实施例中短数据的发送过程与集群组的语音发送过程或 集群组的抢占上行设置为两个独立的过程， 并且在听者发送短数据时采 用扩充接入脉冲（AB )消息， 使无线通信系统网络侧能够识别出接收到 的消息是短数据的请求上行， 从而在集群组内广播接收到的短数据， 因 此，本发明实施例提供的方法及系统可以在 1.5上行占用方式且允许 PTT 抢占的集群组内发送短数据， 实现短数据和语音的同传。 附图简要说明
图 1为本发明实施例讲者发送短数据的方法流程图；
图 2为本发明实施例讲者跨 BSC发送短数据的方法流程图； 图 3为本发明实施例讲者向指定听者发送短数据的方法流程图； 图 4为本发明实施例听者发送短数据的方法流程图；
图 5为本发明实施例听者跨 BSC发送短数据的方法流程图； 图 6为本发明实施例听者向指定接收者发送短数据的方法流程图； 图 7为本发明实施例重发短数据的方法流程图。 实施本发明的方式
为使本发明的目的、 技术方案和优点更加清楚明白， 以下举实施例 并参照附图， 对本发明进一步详细说明。
本发明实施例提供的方法能够在 1.5上行占用方式下且允许 PTT抢 占的集群组内传送短数据时不中断语音的传输， 即短数据和语音同时广 播。 在具有组呼功能的无线通信系统中， 在 1.5上行占用方式下且允许 ΡΤΓ抢占的集群组内实现短数据和语音的同传。
在 1.5 '上行占用方式下， 讲者由于占用集群组内讲者专用信道， 在 发送短数据时， 可以通过所占用的讲者专用信道上行发送短数据； 听者 通过所在小区的集群组的组呼信道上行发送短数据， 即通过扩充 AB消 息占'用集群组的组呼信道上行发送短数据。 听者发送短数据时， 需要占 用集群组的组呼信道上行， 但为了实现短数据和语音同传， 这种上行占 用应该与正常的上行占用相区分， 避免影响正在占用讲者专用信道上行 的讲者或者其他听者正常的上行占用。 因此， 本发明实施例定义了扩充 AB消息， 使具有组呼功能的无线通信系统网络侧在接收到扩充 AB消 息时得知当前是短数据的上行占用。
在本发明实施中， 无论是听者发送短数据还是讲者发送携带短数据 的消息， 为了使无线通信系统网络侧在接收到短数据时得知接收到的为 携带短数据的消息， 本发明实施例定义了携带短数据的消息。 当无线通 信系统网络侧接收到携带短数据的消息时 , 将短数据通过讲者专用信道 下行和集群组的组呼信道下行进行广播。
以下分别对讲者发送短数据以及听者发送短数据进行详细说明。 讲者发送短数据
殳设集群组组呼已经建立，集群组内的讲者驻留在讲者专用信道上， 通过讲者专用信道上行向无线通信系统网络侧发送语音， 无线通信系统 网络侧通过讲者所在集群组的组呼信道下行向听者广播讲者发送的语 音。 这时， 讲者需要发送短数据， 将该短数据携带在层三消息中， 通过 讲者专用信道上行发送给无线通信系统网络侧， 无线通信系统网络侧将 该消息携带的短数据在讲者所在集群组的组呼信道下行以及讲者专用 信遒下行进行广播。
图 1为本发明实施例讲者发送短数据的方法流程图， 该方法涉及的 网络实体包括移动台（ MS )、无线通信系统网络侧的基站收发信台（ BTS ) 以及 BSC, 其中， MS为集群组内的讲者， BTS为讲者所在小区的 BTS, BSC为讲者所在小区的 BSC, 其具体步骤为：
步骤 100、MS通过讲者专用信道上行向 BTS发送层三消息帧（I帧）， 即短数据业务请求（ SMD Service Request ), 携带短数据。
其中，讲者专用信道上行可以为快速随路控制信道（ FACCH )上行。
SMD Service Request还可以携带 MS的标识， 如 MS的国际移动用 户识别码 ( IMSI
步骤 101、 BTS采用数据指示（DATAIND )消息向 BSC转发 SMD Service Requsst。
步骤 102、 BSC接收到 SMD Service Request后， 获取其携带的短数 据， 将短数据携带在短数据业务通知 （SMD Notification ) 消息中通过 MS所在集群组的组呼信道下行以及讲者专用信道下行进行广播。
其中， 用于广播短数据的组呼信道和讲者专用信道可以为 FACCH。 在现有技术中， BSC可以管辖多个小区， 在广播 SMD Notification 消息时， 将在 BSC管辖的所有 MS所在集群组的小区内广播。
SMD Notification消息还可以携带 MS的标识，如 MS的国际移动用 户识别码（IMSI )。
在本发明实施例中， 当集群组跨 BSC时， 也可以实现跨 BSC发送 短数据， 如图 2所示， 其中 BSC1和 BTS1为 MS1 , 即讲者所属的 BSC 和 BTS; BSC2和 BTS2为管辖集群组所在区域的另一个 BSC和 BTS， MS2为在 BSC2管辖下的集群组的听者， 移动业务交换中心（MSC )管 辖 BSC1和 BSC2, 讲者发送短数据的具体步驟为： 步驟 200、 MSI通过讲者专用信道上行向 BTS1发送 SMD Service Request, 携带短数据。
其中， 讲者专用信道上行可以为 FACCH上行。
SMD Service Request还可以携带 MS的标识。
步骤 201、 BTS1采用 DATA IND消息向 BSC转发 SMD Service Requesto
步驟 202、BSC1采用短数据业务报告（ SMD REPORT )消息向 MSC1 转发 SMD Service Requesto
步骤 203 ~步骤 204、 MSC1接收到 SMD Service Request后， 获取 所携带的短数据， 将短数据携带在短数据业务通报（SMD NOTIFY )消 息中发送给 BSC1和 MSC2。
在本发明实施例中， SMD NOTIFY消息与 SMD Notification消息的 不同之处在于 , SMD NOTIFY消息为上行消息 , 而 SMD Notification消 息为下行消息。
步骤 205、 MSC2将接收到的 SMD NOTIFY消息转发给 BSC2。 步骤 206 -步骤 207、 BSC1将接收到的携带在 SMD NOTIFY中的 短数据采用 SMD Notification消息通过管辖的集群组的组呼信道下行以 及讲者专用信道下行进行广播； BSC2将接收到的携带在 SMD NOTIFY 中的短数据采用 SMD Notification消息通过管辖的集群组的組呼信道下 行进行广播。
在实现跨 BSC发送短数据时， 集群系统网络侧的 BSC都设置有转 发短数据的标识， 当 BSC接收到短数据时，会根据该标识确定是在 BSC 所管辖的区域内广播短数据， 还是进一步发送给 MSC, 由 MSC在所管 辖的区域内广播短数据。
相应地， 在 MSC将短数据发送给 BSC时， 也发送给设置有转发短 数据标识的 BSC。
在本发明实施例中， 讲者也可以在发送短数据时指定集群组内的某 个听者接收， 不仅避免短数据在讲者专用信道， 如 FACCH对话音质量 产生的影响， 而且避免短数据对正在通过集群组的組呼信道下行接收语 音的其他听者产生的干扰。
讲者在发送短数据时指定集群组内的某个听者接收的方法与图 1所 述的方法区别在于， 讲者在向集群系统网络侧发送短数据时还携带指定 听者标识， 该指定听者标识指示该短数据发送到的听者， 集群系统网絡 侧接收到该指定听者标识后， 确定具有该指定听者标识的听者所在区 域， 在确定的区域广播短数据。
图 3为本发明实施例讲者向指定听者发送短数据的方法流程图， 该 方法涉及的网络实体包括 MS、 无线通信系统网络侧的 BTS、 BSC以及 核心网 （NSS ), 其中， MS为集群组内的讲者， BTS为讲者所在小区的 BTS, BSC为讲者所在小区的 BSC, NSS为管辖讲者的集群组的 NSS， NSS中具有的实体包括多个 MSC和拜访位置寄存器（VLR ), NSS中的 MSG之间还可以进行消息转发， 其具体步骤为：
步骤 300、MS通过讲者专用信道上行向 BTS发送层三消息帧（ I帧）， 即 SMD Service Request, 携带短数据和指定听者标识。
指定听者标识可以为指定听者的 IMSI或指定听者的移动用户综合 业务数字网号码（MSISDN )。
步驟 301、 BTS采用 DATA IND 消息向 BSC转发 SMD Service Rsqusst。
步骤 302、 BSC采用 SMD REPORT消息向 NSS转发 SMD Service Request,
步骤 303、 NSS接收到 SMD Service Request后， 获取所携带的短数 据以及指定听者标识， 确定具有所携带听者标识的听者所在区域， 将短 数振和指定听者标识携带在 SMD NOTIFY消息中发送给管辖所确定区 域的 BSC (在图 3中该 BSC就是 MS所在的 BSC )。
当 NSS接收到 SMD Service Request时， 会判断是否携带有指定听 者标识，如果没有，则采用图 2所述的方法经 BSC将短数据携带在 SMD Notification消息中进行广播；如果有，则由于 NSS中包括 MSC和 VLR, 由 MSC和. VLR按照现有技术进行交互， 验证具有指定听者标识的听者 是否签约了 MS所在集群组， 如果是， 则按照现有技术查找到具有指定 听者标识的听者所在区域， 将短数据携带在 SMD NOTIFY消息中发送 给管辖所确定区域的 BSC, 否则， NSS将 SMD Service Request丢弃。
步驟 304、 管辖所确定区域的 BSC将短数据和指定听者标识携带在 SMD Notification消息中在所管辖区域内通过集群组的组呼信道下行进 行广播（在图 3中表示为通过 MS所在集群组的组呼信道下行以及讲者 专用信道下行进行广播)。
如果讲者不在管辖所确定区域的 BSC所管辖的区域中，则短数据不 通过讲者专用信道下行进行广播。
听者发送短数据
由于在 1.5上行占用方式下， 无论已经建立組呼的集群组有无讲者， 集群组的组呼信道上行都是空闲的， 听者就可以在所在小区的集群组的 组呼信道上行上报扩充 AB消息， 扩充 AB消息携带有原因值， 请求占 用听者所在小区的集群组的组呼信道上行用于发送短数据， 而后通过所 占用的听者所在小区的集群组的组呼信道发送短数据。
扩充 AB消息的格式如表 1所示：
I 信息值 I 原因值 I 8 1
OllOxxxx 发送短数据
表 1
当扩充 AB消息携带 0110时，表示请求占用听者所在小区的集群组 的组呼信道上行用于发送短数据。 当然， 本发明实施例也可以在扩充 AB 消息中设置其他的二进制数， 只要无线通信系统网络侧根据预先设 置的规则能够识别出扩充 AB消息携带的二进制数表示请求占用听者所 在小区的集群组的组呼信道上行用于发送短数据即可。
本发明实施例使用扩充 AB消息， 主要有以下优点： 第一， 将短数 据的上行占用和其他诸如抢占上行彻底分开 , 相应地， 无线通信系统网 絡侧接收到扩充 AB消息后就确定要广播短数据； 第二， 对于短数据的 上行占用， 不需要和抢占上行一样， 向无线通信系统网络侧的 MSC报 上行请求（UPLINK REQ ) 消息， 不影响集群组内组呼中讲者进行的语 音传输； 第三, 对于短数据的上行占用， 无线通信系统网络侧的 BSC可 以针对听者所属的小区进行分别处理， 听者在所属小区发送扩充 AB消 息以及短数据不影响集群组内的其他 、区发起短数据传送或占用上行； 第四， 短数据的上行占用不需要像抢占上行那样需要无线通信系统网络 侧的 BSC和 MSC通过 A接口进行消息交互， A接口不需要扩展短数据 消息。
图 4为本发明实施例听者发送短数据的方法流程图， 该方法涉及的 网络实体包括 MS、 无线通信系统网络侧的 BTS以及 BSC, 其中， MS 为集群组内的听者， BTS为听者所在小区的 BTS, BSC为听者所在小区 的 BSC, 其具体步骤为：
'步驟 400、 BTS 在管辖小区内发送集群组的组呼信道上行空闲 ( Uplink Free ) 消息。 在 1.5上行占用方式下且允许 PTT抢占时， 无论集群组的讲者是否 正在通过讲者专用信道进行讲话， 只要没有 MS占用集群组的组呼信道 上行， BTS就发送 Uplink Free消息。
步骤 401、 MS发送上行占用 （Uplink Access )消息， 请求占用所在 小区的集群组的组呼信道上行发送短数据， Uplink Access消息是一个扩 充 AB消息， 其中携带了本发明定义的原因值表明要占用集群组的组呼 信道上行用于发送短数据。
步骤 402、 BTS向 BSC发送短数据检测 （ Data Detect ) 消息， 用于 通知 BSC有 MS要占用该 MS所在小区的集群组的组呼信道上行发送短 数据。
Data Detect消息的消息结构与现有技术听者发起上行抢占时 BTS向 BSC发送的讲者检测（Talker Detect )消息的消息结构相同， 但是， BSC 处理 Data Detect消息的过程与处理 Talker Detect消息的过程不相同： 不 需要和 MSC进行消息交互， 从而避免了因为发送短数据而影响集群組 内讲者进行的语音传输。
步骤 403、 BTS向 MS发送上行占用消息的响应 （ Uplink Grand )。 步骤 404、 MS向 BTS发送异步平衡模式（SABM ) 消息， 该消息 携带 SMD Service Request, SMD Service Request中包括短数据和 MS的 IMSL
SABM消息是层三消息。
步骤 405、 BTS向 MS发送 SABM消息的响应 （UA )。
步骤 406、 BTS向 BSC发送建链指示（EST IND ) 消息， 该消息携 带 MS发送的 SMD Service Request。
步骤 405和步骤 406的执行顺序可以调换。
步骤 407、 BSC在 MS 当前所在小区广播上行组呼信道忙（Uplink Busy )消息，用于在 MS当前所在小区内指示集群组的组呼信道上行忙。 对于现有技术的抢占上行， BSC'在所管辖的集群组的所有小区内都 '发送 Uplink Busy, 而本发明的短数据请求上行， BSC仅在 MS当前所在 小区发送 Uplink Busy, 以便集群组不同小区发送的短数据相互独立， 同 时也避免发送短数据影响其他小区的短数据请求上行或抢占上行。
步骤 408、 BSC 通过组呼信道上行向 MS 发送上行释放（Uplink Release ) 消息， 释放 MS占用的组呼信道上行。
步骤 409、 BSC向 BTS发送释放请求（ REL REQ ), 指示 BTS释放 MS占用的组呼信道上行。
步骤 410、 BTS在释放 MS占用的组呼信道上行后， 向 BSC发送释 放确认（REL CNF ), 确认已经释放了 MS占用的组呼信道上行。
步骤 411、 BSC在 MS当前所在小区广播上行组呼信道空闲（Uplink Free ) 消息， 指示 MS当前所在小区的其他 MS以及 MS可以发起短数 据请求上行或抢占上行。
步骤 412、 BSC 在所管辖的集群组的所有小区内广播 SMD Notification消息， 该 SMD Notification消息携带短数据。
BSC在所管辖的集群组的所有小区内广播实际上就是在集群组所有 组呼信道的下行以及讲者专用信道下行发送。
如果集群组内不存在讲者专用信道， 则只在集群组所有组呼信道的 下行发送。
该 SMD Notification消息还可以携带 MS的 IMSI。
在现有技术中， BSC可以管辖多个小区， 在广播 SMD Notification 消息时， 将在 BSC管辖的所有 MS所在集群组的小区内广播。
在本发明中， 当集群组跨 BSC时， 也可以实现跨 BSC发送短数据， 如图 5所示， 其中 BSC1和 BTS1为 MS1 , 即听者所属的 SC和 BTS; BSC2和 BTS2为管辖集群组所在区域的另一个 BSC和 BTS, MS2为在 BSC'2管辖下的集群组的另一个听者或讲者， MSC1管辖 BSC1 , MSC2 管辖 BSC2, 其具体步驟为：
步骤 500、 BTS1在管辖小区内发送集群组的 Uplink Free消息。 步骤 501、 MS 1发送 Uplink Access消息， 请求占用所在小区的集群 组的组呼信道上行发送短数据， Uplink Access消息是一个扩充 AB消息， 其中携带了本发明实施例定义的原因值表明要占用集群組的组呼信道 上行用于发送短数据。
步骤 502、 BTS1向 BSC 1发送 Data Detect消息， 用于通知 BSC1有 MS1要占用该 MS1所在小区的集群组的组呼信道上行发送短数据。
Data Detect消息的消息结构与现有技术听者发起上行抢占时 BTS向 BSC发送的 Talker Detect消息的消息结构相同， 但是， BSC1处理 Data Detect 消息的过程与处理 Talker Detect 消息的过程不相同： 不需要和 MSC1进行消息交互， 从而避免了因为发送短数据而影响集群组内讲者 进行的语音传输。
步骤 503、 BTS1向 MS1发送 Uplink Grand。
步骤 504、 MSI向 BTS1发送 SABM消息，该消息携带 SMD Service Request, SMD Service Request中包括短数据和 MSI的 IMSI。
SABM消息是层三消息。
步骤 505、 BTS1向 MS1发送 SABM消息的 UA。
步驟 506、 BTS1向 BSC1发送 EST IND消息， 该消息携带 MS1发 送的 SMD Service Request„
步骤 507、BSC1采用 SMD REPORT消息向 MSC1转发 SMD Service Request
步骤 508、 BSC1在 MSI当前所在小区广播 Uplink Busy消息， 用于 在 MSI当前所在小区内指示集群组的组呼信道上行忙。
步骤 509、 BSC 1通过组呼信道上行向 MS 1发送 Uplink Release消息， 幹放 MS1占用的组呼信道上行。
步骤 510、 BSC1向 BTS1发送 REL REQ, 指示 BTS1译放 MS1占 用的组呼信道上行。
步骤 511、 BTS1在释放 MS1 占用的组呼信道上行后， 向 BSC1发 送 REL CNF, 确认已经释放了 MS1占用的组呼信道上行。
'步驟 512、 BSC1在 MS1当前所在小区广播 Uplink Free消息， 指示 MS1 当前所在小区的其他 MS以及 MSI可以发起短数据请求上行或抢 占上行。
步骤 513 ~ 514、 MSC1接收到 SMD Service Request后，获取所携带 的短数据，将短数据携带在 SMD NOTIFY消息中发送给 BSC 1和 MSC2。
步骤 515、 MSC2转发该 SMD NOTIFY消息给 BSC2。
步骤 516 ~步骤 517、 BSC1将接收到的携带在 SMD NOTIFY消息 中的短数据采用 SMD Notification消息通过管辖的集群組的组呼信道下 行以及讲者专用信道下行进行广播; BSC2 将接收到的携带在 SMD NOTIFY消息中的短数据采用 SMD Notification消息通过管辖的集群组 的组呼信道下行进行广播。
在实现跨 BSC发送短数据时， 集群系统网絡侧的 BSC都设置有是 否将短数据进一步发送给 MSC的标识， 当 BSC接收到短数据时， 会根 据该标识确定是否在 BSC所管辖的区域内广播短数据，还是进一步发送 给 MSC， 由 MSC在所管辖的区域内广播短数据。
在本发明实施例中， 听者也可以在发送短数据时指定集群组内的其 他听者或讲者接收， 不仅避免短数据在讲者专用信道， 如 FACCH对话 音质量传生的影响， 而且避免短数据对正在通过集群组的组呼信道下行 接收语音的其他听者产生的干扰。
听者在发送短数据时指定集群组内的某个听者接收的方法与图 4所 述的方法区别在于， 听者在向集群系统网络侧发送短数据时还携带指定 接收者标识， 该指定接收者标识指示该短数据发送到的听者或讲者， 集 群系统网络侧接收到该指定接收者标识后， 确定具有该指定接收者标识 的听者或讲者所在区域， 在确定的区域广播短数据。
图 6为本发明实施例听者向指定接收者发送短数据的方法流程图， 该方法涉及的网络实体包括 MS、 无线通信系统网络侧的 BTS、 BSC以 及 NSS, 其中， MS为集群组内的听者， BTS为听者所在小区的 BTS, BSC为听者所在小区的 BSC, NSS为管辖听者的集群组所在的 NSS, NSS中具有的实体包括 MSC和 VLR, NSS中的 MSC之间还可以进行 消息转发， 其具体步骤为：
步骤 600、 BTS在管辖小区内发送集群组的 Uplink Free消息。
步骤 601、 MS发送 Uplink Access消息， 请求占用所在小区的集群 组的组呼信道上行发送短数据。
步骤 602、 BTS向 BSC发送 Data Detect消息。
步骤 603、 BTS向 MS发送 Uplink Grand。
步骤 604、 MS向 BTS发送 SABM消息， 该消息携带 SMD Service Request, SMD Service Request中包括短数据和接收者的标识。
步骤 605、 BTS向 MS发送 UA。
步骤 606、 BTS向 BSC发送 EST IND消息， 该消息携带 MS发送的 SMD Service Request。
步骤 605和步骤 606的执行顺序可以调换。
步骤 607、 BSC向 NSS发送 SMD REPORT消息， 该消息携带 MS 发送的 SMD Service Request » 当 NSS接收到 SMD Service Request时， 会判断是否携带有指定听 者标识，如果没有，则采用图 5所述的方法经 BSC将短数据携带在 SMD Notification消息中进行广播；如果有，则由于 NSS中包括 MSC和 VLR, 由 MSC和. VLR按照现有技术进行交互， 验证具有指定接收标识的听者 或讲者是否签约了 MS所在集群组， 如果是， 则按照现有技术查找到具 有指定听者标识的听者所在区域， 否则， NSS将 SMD Service Request 丢畀。
步骤 6Q8、 BSC在 MS当前所在小区广播 Uplink Busy消息。
步骤 609、 BSC通过组呼信道上行向 MS发送 Uplink Release消息。 步骤 610、 BSC向 BTS发送 REL REQ。
步骤 611、 BTS在释放 MS占用的组呼信道上行后，向 BSC发送 REL CNF0
步骤 612、 BSC在 MS当前所在小区广播 Uplink Free消息。
步驟 613、 NSS将短数据和指定听者标识携带在 SMD NOTIFY消息 中发送给管辖所确定区域的 BSC (在图 6 中该 BSC就是 MS所在的
BSC )。
步骤 614、 管辖所确定区域的 BSC将短数据和指定听者标识携带在 SMD Notification消息中在所管辖区域内通过集群组的组呼信道下行进 行广播（在图 6中表示为通过 MS所在集群組的组呼信道下行以及讲者 专用信道下行进行广播)。
如果讲者不在管辖所确定区域的 BSC所管辖的区域中，则短数据不 通过讲者专用信道下行进行广播。
在本发明实施例中， 由于 NSS中的 MSC只能通过现有技术位置更 新确定具有指定听者标识的听者当前所在的区域， 而不能准确的确定具 有指定听者标识的听者当前所在的小区，所以 NSS只能将短数据携带在 SMD NOTIFY消息中发送给管辖所确定区域的 BSC。
在本发明实施例中，当集群组的听者或讲者接收到 SMD Notification 消息时， 先判断 SMD Notification消息是否携带有指定接收者标识， 如 果不是， 接收所携带的短数据； 如果是， 则判断所携带的指定接收者标 识是否与自身设置的一致， 如果是， 接收所携带的短数据； 如果否， 则 丟弃 SMD Notification消息。
本发明实施例为了提高发送短数据的可靠性，还提供了 BSC重广播 SMD Notification消息的功能。 本发明实施例在 BSC设置重广播 SMD Notification消息次数和间隔， 重广播次数的范围可以设置为 0 ~ 5 , 0表 示不需要童广播。重发间隔的范围可以设置为 1 ~ 10,单位为百 ms。 BSC 还可以进行默认重广播， 在默认重广播时， 间隔为 500ms, 重广播 SMD Notification消息两次。
图 7为本发明实施例重发短数据的方法流程图， 该方法涉及的网络 实体包括无线通信系统网络侧的 BSC和 BTS, 以及集群组的听者或讲 者， 其具体步骤为:
步骤 700、 BSC接收到 BTS转发的由听者或讲者发送的某集群组的 短数据， 采用图 1或图 2所述的步骤在集群组内广播该短数据后， 为该 集群组緩存短数据并记录实际已重广播次数为 0。
步骤 701、 BSC根据配置的重广播间隔时间启动定时器， 当定时器 超时， 重新广播携带所緩存的短数据的 SMD Notification消息后， 更新 实际重广播次数。
该定时器是集群組组呼级的，针对每一个集群组在 BSC中设置一个 定时器。
步驟 702、 BSC判断实际重广播次数是否已经达到设置的重广播次 数， 如果是， 转入步驟 703; 否则， 转入步骤 704。 步骤 703、 BSC释放所緩存的短数据， 结束。
步骤 704、 转入步骤 701继续执行。
当该集群组内有新的短数据发送到 BSC时， BSC停止定时器的计时 并释放所緩存的短数据后， 緩存接收到的新的短数据并按照图 7所述的 步骤执行。
通过本发明实施例提供的方法， 能够在具有组呼功能的无线通信系 统中， 如在基于 GSM技术的具有组呼功能的无线通信系统中， 实现 1.5 上行占用方式下且允许 PTT抢占的集群组的组呼信道下行的短数据和 语音的同传， 实现 1.5上行占用方 下且允许 PTT抢占的集群组内的讲 者在讲话过程中同时传送讲者或集群组内的听者发送的短数据。
本发明.实施例还提供一种在集群组内发送短数据的系统， 该系统包 括集群组内的终端和网络侧设备， 其中， 终端， 用于通过所占用的专用 信道或所在小区的集群组的组呼信道上行将短数据发送给网絡侧设备； 网络侧设备， 用于接收终端发送的短数据并广播所述短数据。
在本发明实施例中， 当终端当前为集群組中的讲者时， 所述通过所 占用的专用信道发送短数据； 当终端当前为集群组中的听者时， 所述通 过所在小区的集群组的组呼信道上行发送短数据。
以上所述的具体实施例， 对本发明的目的、 技术方案和有益效果进 行了进一步详细说明， 所应理解的是， 以上所述仅为本发明的具体实施 例而已， 并不用于限制本发明， 凡在本发明的精神和原则之内， 所做的 任何修改、 等同替换和改进等， 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种在集群组内发送短数据的方法， 其特征在于， 该方法包括： 讲者发送短数据时， 将短数据通过所占用的讲者专用信道上行发送 给无线通信系统网络侧； 听者发送短数据时， 将短数据通过所在小区的 集群组的組呼信道上行发送给无线通信系统网络侧；
无线通信系统网络侧接收到讲者或听者发送的短数据后， 广播短数 据。
2、如权利要求 1所述的方法， 其特征在于， 所述讲者向无线通信系 统网络侧发送短数据的过程为：
讲者通过讲者专用信道上行向无线通信系统网络侧的基站收发信台 BTS发送短数据业务请求 SMD Service Request, 携带短数据；
BTS采用数据指示 DATA IND消息向无线通信系统网络侧的基站控 制器 BSC转发携带短数据的 SMD Service Request
3、 如权利要求 2所述的方法， 其特征在于， 所述的 SMD Service Request还携带有讲者的标识。
4、 如权利要求 2所述的方法， 其特征在于， 在 BSC中设置转发短 数据的标识， 所述讲者向无线通信系统网络侧发送短数据的过程还包 括：
BSC根据设置的标识确定将短数据发送给无线通信系统网络侧的移 动交换中心 MSC, 采用短数据业务报告 SMD REPORT消息向 MSC转 发携带短数据的 SMD Service Request
5、 如权利要求 4所述的方法， 其特征在于， 所述的 SMD Service Request还携带有指定听者标识。
6、 如权利要求 2所述的方法， 其特征在于， 在 BSC中设置转发短 数据的标识， 所述广播短数据的过程为： MSC接收到讲者发送的短数据后，将短数据携带在短数据业务通报
SMD NOTIFY消息发送给设置转发短数据标识的一个或一个以上 BSC, 该 BSC根据设置的标识确定将短数据进行广播，将短数据携带在短数据 业务通知消息 SMD Notification消息中通过集群组的组呼信道下行或 /和 讲者专用信道下行广播。
7、如权利要求 6所迷的方法，其特征在于，所述的 SMD Notification 消息携带有指定听者标识。
8、 如权利要求 6所述的方法， 其特征在于， 在 BSC广播短数据之 前， 该方法还包括：
管辖 MSC的核心网 NSS判断接收到 SMD Service Request携带的指 定听者标识对应的听者是否签约了集群组， 如果是， 将短数据携带在 SMD NOTIFY消息中发送给管辖具有指定听者标识的听者的 BSC; 否 则， 丢弃接收到的 SMD Service Request。
9、 如权利要求 1所述的方法， 其特征在于， 所述听者向无线通信系 统网络侧发送短数据的过程为：
当集群组的组呼信道上行空闲时， 听者向无线通信系统网络侧的 BTS发送携带. SMD Service Request的异步平衡模式 SABM消息， SMD Service Request中包括听者要发送的短数据。
10、 如权利要求 9所述的方法， 其特征在于， 在听者发送 SABM消 息之前， 该方法包括：
接收到 BTS广播的组呼信道上行空闲 Uplink Free消息后， 听者向 BTS发送上行占用 Uplink Access消息；
BTS向无线通信系统网络侧的 BSC发送短数据检测 Data Detect消 息， 向听者发送上行占用消息的响应 Uplink Grand;
在听者发送 SABM消息之后， 该方法还包括： BTS向听者发送 SABM消息的响应 UA,向 BSC发送建链指示 EST I D消息， 该消息携带听者发送的 SMD Service Requests
11、 如权利要求 10所述的方法， 其特征在于， 所述 Uplink Access 消息为扩¾接入脉冲 AB消息， 其中携带原因值表明要占用集群组的组 呼信道上行发送短数据。
12、 如权利要求 10所述的方法， 其特征在于， 所述的 SMD Service Request还包括听者的标识。
13、 如权利要求 10所述的方法， 其特征在于， 在 BSC中设置转发 短数据的标识， 该方法还包括：
BSC根据设置的标识确定将短数据发送给 MSC,采用 SMD REPORT 消息向无线通信系统网絡侧的 MSC 转发携带短数据的 SMD Service Request
14、 如权利要求 10所述的方法， 其特征在于， 所述的 SMD Service Request还包括指定接收者标识。
.
15、 如权利要求 9所述的方法, 其特征在于， 所述广播短数据的过 程为：
无线通信系统的 BSC释放听者占用的组呼信道上行,指示无线通信 系统的 BTS释放听者占用的组呼信道上行后 , 在组呼信道下行或 /和集 群组的讲者专用信道下行广播 SMD Notification 消息， 该 SMD Notification消息携带短数据。
16、 如权利要求 15所述的方法, 其特征在于， 所述 BSC释放听者 占用的组呼信道上行的过程为：
BSC在听者当前所在小区发送上行组呼信道忙 Uplink Busy消息， 通过组呼信道上行向听者发送上行释放 Uplink Release消息， 释放听者 占用的组呼信道上行； 所述指示 BTS释放听者占用的组呼信道上行的过程为：
BSC向 BTS发送释放请求 REL REQ, 指示 BTS幹放听者占用的组 呼信道上行；
BTS在释放听者占用的组呼信道上行后，向 BSC发送释放确认 REL CNF;
在所述广播 SMD Notification之前， 该方法还包括：
BSC在听者当前所在小区发送上行組呼信道空闲 Uplink Free消息。
17、 如权利要求 15 所述的方法， 其特征在于， 所述的 SMD Notification携带有指定接收者标识。
18、 如权利要求 15所述的方法， 其特征在于， 在 BSC广播短数据 之前， 该方法还包括：
管辖无线通信系统网络侧的 MSC 的 NSS 判断具有接收到 SMD Service Request携带的接收者标识的听者或讲者是否签约了集群组， 如 果是， 将短数据携带在 SMD NOTIFY消息发送给管辖具有指定接收者 标识的听者或讲者的 BSC; 否则， 丢弃接收到的 SMD Service Request。
19、 如权利要求 7或 17所述的方法， 其特征在于， 该方法进一步包 括： .，
集群组的听者或讲者接收到 SMD Notification消息后， 判断是否携 带有指定听者或接收者标识， 如果不是， 则接收所携带的短数据； 如果 是， 则判断自身的标识是否与所携带的指定听者标识或接收者标识一 致， 如果是， 则接收所携带的短数据； 否则， 则丟弃接收到的 SMD Notification消息。
20、 如权利要求 1所述的方法, 其特征在于， 在无线通信系统网络 侧设置短数据重广播次数以及重广播间隔 , 该方法进一步包括重广播短 数据的步骤： A、 无线通信系统网络侧緩存接收到的短数据；
B、 启动针对集群组设置的定时器等待设置的重广播间隔后， 通过 集群组的讲者专用信道下行和组呼信道下行广播緩存的短数据并更新 实际重广播次数；
C、 无线通信系统网络侧判断实际重广播次数是否大于设置的重广 播次数， 如果是， 则释放所緩存的短数据， 结束本流程； 否则， 则转入 步驟 B继续执行。
21、 一种在集群组内发送短数据的系统， 其特征在于， 该系统包括 集群组内的终端和网络侧设备， 其中，
终端 , 用于通过所占用的专用信道或所在小区的集群组的组呼信道 上行将短数据发送给网络侧设备；
网络側设备， 用于接收终端发送的短数据并广播所述短数据。
22、如权利要求 21所述的系统， 其特征在于， 所述终端当前为集群 组中的讲者时， 所述通过所占用的专用信道发送短数据；
'所述终端当前为集群组中的听者时， 所述通过所在小区的集群组的 组呼信道上行发送短数据。
PCT/CN2007/000282 2006-03-07 2007-01-25 Procédé et système pour envoyer des smd dans un faisceau de lignes WO2007101386A1 (fr)

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EP07702200A EP1901566B1 (en) 2006-03-07 2007-01-25 AQ method and system for sending SMD in trunk group
AT07702200T ATE472234T1 (de) 2006-03-07 2007-01-25 Verfahren und system zum senden von smd in bündeln
AU2007222811A AU2007222811B2 (en) 2006-03-07 2007-01-25 A method and system for sending SMD in trunk group
CN2007800002999A CN101317469B (zh) 2006-03-07 2007-01-25 一种在集群组内发送短数据的方法及系统
DE602007007266T DE602007007266D1 (zh) 2006-03-07 2007-01-25
CA2616074A CA2616074C (en) 2006-03-07 2007-01-25 Method and system for transmitting application data in trunk group

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AU2007222811A1 (en) 2007-09-13
EP1901566B1 (en) 2010-06-23
CN100471293C (zh) 2009-03-18
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CA2616074C (en) 2012-01-03
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ATE472234T1 (de) 2010-07-15

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