CN1882123A - Cluster communication method for mobile network terminal - Google Patents
Cluster communication method for mobile network terminal Download PDFInfo
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- CN1882123A CN1882123A CN 200510076682 CN200510076682A CN1882123A CN 1882123 A CN1882123 A CN 1882123A CN 200510076682 CN200510076682 CN 200510076682 CN 200510076682 A CN200510076682 A CN 200510076682A CN 1882123 A CN1882123 A CN 1882123A
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Abstract
The invention relates to a group communication method of mobile network, which comprises: the calling terminal sends descending synchronous sequence; sending call build signal in said channel, to confirm the call group and group service type; sending the public control information; receiving the descending synchronous sequence of service carrier frequency preset by the terminal, based on which, to synchronize the calling terminal and obtain the call build signal and the public control signal; the calling terminal sends service data and the receiving terminal obtains the service data. In said invention, the channel is built and maintained by calling terminal; therefore, the group user can keep communication function when off the network.
Description
Technical field
The present invention relates to a kind of cluster communication method of mobile network terminal, especially a kind of cluster communication method of the mobile network terminal based on TD-SCDMA technology.
Background technology
So-called trunking communication is an a kind of multi-user shared group communication channel and not interactive technology.Along with the development of mobile communication, the application of public mobile communication network has appearred trunking communicating technology is dissolved into.
Fig. 1 is a schematic diagram of realizing the mobile network terminal trunking communication among the mobile network.With reference to Fig. 1, mobile network provides the General Principle of trunking communication to be: each channel in radio network controller centralized control and the management system; On down direction, the broadcast channel of system can be answered by all users simultaneously, on up direction, user's mobile network terminal sends the request of access channel to system, radio network controller is distributed to the user who makes a call to idle channel with dynamical fashion, again this channel is regained to the user who waits for after conversation is finished and is used.
Because public mobile communications network has wide coverage, thereby after Clustering is incorporated into public mobile communication network, can make the holder of mobile network terminal any time in network coverage realize trunking communication, especially in network based on CDMA (Code Division Multiple Access), trunked communication system can also provide high-speed data service (as video transmission, file transfer etc.) except short calling being provided, setting up the business such as list/multi-user's communication, dynamic reorganization, ambience listening, fail soft, Virtual Private Network.On the other hand, the defective of prior art is: the holder of mobile network terminal can only realize trunking communication in network coverage, the network coverage less than or the network zone of breaking down in, the holder of mobile network terminal can't initiate trunked call.
Summary of the invention
The problem to be solved in the present invention provides a kind of cluster communication method of mobile network terminal, and this method can make the mobile network terminal holder realize trunking communication in the zone that does not have the network coverage.
For solving the problems of the technologies described above, the objective of the invention is to be achieved through the following technical solutions:
1) calling terminal sends downlink synchronous sequence; In described channel, send call set up signaling, determine call group and group service type; And issue common control information;
2) answer terminal and detect downlink synchronous sequence on the business carrier frequency preset, synchronous according to described downlink synchronous sequence and calling terminal, and obtain described call set up signaling and common control information;
3) calling terminal sends business datum, answers terminal and obtains described business datum.
In said method, 1) be specially: calling terminal is the message blocks that the cycle sends downlink synchronous sequence and 1/4 call set up signaling with 5ms; Described synchronizing sequence is carried out and differs is the phase modulated of 90 degree, and with the message blocks corresponding to described 1/4 common control information, a modulation period of synchronizing sequence is corresponding to a complete common control information.Described 5ms is a subframe, and 2 subframes constitute the frame of a 10ms, and the frame of 16 10ms constitutes 1 multi-frame.
In the subframe of each 5ms, calling terminal sends downwards public control information at the TS0 time slot; Send downlink dedicated data and signaling at TS3 to TS6 time slot; Answer terminal and send the uplink random access information at the TS1 time slot; And reservation TS2 time slot.
On the said method basis, step 2) also comprises in: agree to set up this callings if answer terminal according to described call set up signaling, then send the affirmation information of calling out connection of setting up to calling terminal; 2) with 3) between comprise 4): calling terminal judges whether to receive that in first duration that presets answering terminal sets up the affirmation information that is connected of calling out, and as if receiving, then carries out step 3).And, 4) in also further comprise: after calling terminal obtains described confirmation, in second duration that presets, send the response message obtain this confirmation to answering terminal.Wherein said first duration equates with second duration.
On the said method basis, 1) also comprise 5 before): judge whether the business carrier frequency that presets is occupied, if not, then be provided with certainly as calling terminal, and carry out step 1).Perhaps, if Traffic Channel is occupied, then further comprise: send business carrier frequency to the current calling terminal that takies business carrier frequency and take request, if the priority of this request is higher than current group call, then current calling terminal discharges this business carrier frequency, described request takies the terminal setting of business carrier frequency certainly as calling terminal, and carries out step 1).
In the said method, also comprise 6 after the step 3)): the calling terminal business datum issues the calling termination message after sending and finishing; And current calling terminal judges that whether answering terminal request in presetting duration makes a call; If have, then to answer terminal and send the request confirmation to this, this answers the terminal setting from as calling terminal, carries out step 1); Otherwise current calling terminal discharges channel resource.And when last calling terminal transferred back one calling terminal with right of speech, back one calling terminal used the scrambler of last calling terminal, and the frame number of last calling terminal is used in continuity.
In the said method, answering terminal before calling terminal transmission information, in described channel, sending uplink synchronous sequence and carry out uplink synchronous to calling terminal.
Among the present invention, described calling terminal keeps maximum transmission power, and the described terminal of answering is by determining signal transmission power with the open Loop Power control of calling terminal.
Above technical scheme as can be seen, at the cluster communication method of mobile network's terminal provided by the present invention, communication channel is set up by calling terminal and is safeguarded, thereby cluster user can keep communication function under the situation that breaks away from network.
Further, adopt the frame structure of existing TD-SCDMA system and structure of time slot, scrambler among the present invention, made the TD-SCDMA terminal under the situation that breaks away from network system, directly to carry out trunking communication.
Further, among the present invention, after current calling terminal finishes issuing service information, back one calling terminal is continued to use the scrambler and the frame number of last calling terminal, and making is not having under the situation of network system, and the channel management of trunked call is simpler, make things convenient for the frame synchronization of each terminal, call setup is more quick.
On the said method basis, calling terminal remains maximum transmission power in the trunking communication process, and receiving terminal, answers terminal by determining signal transmission power with the open Loop Power control of calling terminal.This method has been continued to use Poewr control method in the existing mobile network system, has brought into play the prior art function of portable terminal, and then has guaranteed the call coverage of trunking communication, and has improved communication quality.
The call establishment of this method comprises the call establishment of do not have confirming and the call establishment of affirmation arranged, promptly have the call establishment of affirmation to need again calling terminal to send call set up signaling after, obtain the affirmation of receiving terminal.Select different call establishments at different application, can improve the efficient of colony communication calling foundation or improve the reliability of trunking communication.
In sum, the invention provides simple and effectively, can break away from network system and the terminal cluster communication method that exists.
Description of drawings
Fig. 1 is a schematic diagram of realizing the mobile network terminal trunking communication among the mobile network;
Fig. 2 is the protocol architecture figure that realizes directintermination;
Fig. 3 is the frame structure of described Ud interface;
Fig. 4 is not for there being the call establishment of affirmation flow chart;
Fig. 5 is for there being the call establishment of affirmation flow chart;
Fig. 6 transfers the possession of process flow diagram for right of speech;
Fig. 7 is the preemption processes flow chart;
Fig. 8 sends the normal dispose procedure flow chart that finishes for the calling terminal data.
Embodiment
The present invention will realize the straight-through function of terminal in trunking communication, does not promptly rely on network and direct communication between the colony terminal.Under the direct mode operation, directly communicate by air interface Ud between directintermination; And, being defined in the trunked call, the terminal that has speaking right is " calling terminal ", all the other terminals are " answering terminal ".According to the characteristics of trunking communication, in a calling, simultaneously a calling terminal can only be arranged, and, answer terminal and carry out synchronously to calling terminal.
Fig. 2 is the protocol architecture figure that realizes directintermination.The protocol architecture of the control plane of directintermination can be divided into three-decker, comprising: direct mode operation call control protocol layer (DMCC) provides foundation, maintenance, the channel resource release function of basic call business and the processing of short message; Direct mode operation media access control layer (DM-DM-MAC) provides data link layer functions such as addressing, the encapsulation to the transmission of DMCC layer signaling and business datum and reception, protocol Data Unit (PDU), segmentation reorganization, wireless access; Physical layer, functions such as the synthetic and partition of responsible chnnel coding and scrambler, frame structure, power adjustment, modulation.
Fig. 3 is the frame structure of described Ud interface.As seen from the figure, the frame structure that the present invention adopts is revised on the basis of existing TD-SCDMA, has defined multi-frame structure and time slot characteristic.Under direct mode operation, a multi-frame length is 160ms, the radio frames that to comprise 16 length be 10ms; Each radio frames can be further divided into two identical 5ms subframes again.Subframe structure and structure of time slot are consistent with regulation among the 3GPP, and each time slot adopts existing CDMA mode to carry out channel to cut apart, and the known content for those skilled in the art repeats no more.
Under the direct mode operation of terminal, TS0 is fixed as descending time slot, is used for calling terminal and sends downwards public control information; TS1 is fixed as ascending time slot, is used to answer terminal and sends random access information; TS2 is a reserved time slot; TS3 to TS6 is fixed as descending time slot, is used for calling terminal and sends downlink dedicated data and signaling; Send downlink synchronous sequence (SYNC_DL) in the descending pilot frequency time slot (DwPTS), the synchronous process of terminal and calling terminal maintenance of answering described in the present invention is identical with existing TD-SCDMA net system terminal method for synchronous, is the known technology content of this area.
Above-mentioned every subframe duration 5ms, calling terminal send out at TS0 to send common control information in the cycle, and send downlink synchronous sequence at descending pilot frequency time slot.Because sending to finish, each common control information needs 20ms, be that each common control information needs 4 subframes to send, answer terminal for convenience and find the initial transmission subframe of each 20ms broadcast message, thereby, downlink synchronous sequence (SYNC_DL) all can carry out phase modulated in each subframe, add a fixing phase place when being each subframe transmission SYNC-DL, and indicate the pairing complete public control messages of these four subframes with phase modulation (135 °, 45 °, 225 °, the 315 °) angle of continuous 4 self-vibrations.Answer terminal and can obtain the synchronizing sub-frame of 5ms according to the SYNC-DL that calling terminal sends, according to the phase modulation of SYNC-DL obtain 20ms synchronously, further obtain the common control information of calling terminal.
Described common control information comprises: frame number (0-15); Terminal type identification comprises mobile phone terminal or other; Terminal related information, if terminal type is a mobile phone terminal, then this information comprises mobile phone terminal identifier, mobile phone terminal transmitting power, expectation received power etc.; Physical access channel (FPACH) control information, for answer the terminal access procedure synchronously and the relevant information adjusted of power, and the frame number information of synchronous code that receives number and reception; Channel related information, according to the channel status difference, information content difference, when channel is in free time (Idle) state, then there is not described channel related information, if channel is for keeping (Reserved) state, then comprise the reservation channel type, the calling terminal identifier, answer terminal identifier or answer terminal group identifier, present type of service etc. take (Occupied) state when channel is in, then comprise the calling terminal identifier, answer terminal identifier or answer information such as terminal group identifier, present type of service, call priority.Control messages mainly is in order to help to answer the state that terminal is understood the current business channel as early as possible, and the terminal that enters trunked call for lagging provides current business information, and whether the terminal judges that enters that conveniently lags should add current calling.
As mentioned above, calling terminal sends downlink dedicated data and signaling at TS3 to TS6; Signaling procedure between directintermination mainly comprises: call setup, right of speech transfer, right of speech are seized, the call release process.Below above-mentioned each signaling procedure is introduced.
The General Principle of call setup is: each terminal all can periodically be searched for the DwPTS signal on available frequency, thereby when terminal has the demand that sends data, detect earlier whether descending DwPTS signal is arranged on the frequency of current use, if do not have, then this terminal can be used as calling terminal, and then send descending DwPTS signal, and send call set up signaling at descending time slot; Other-end will be synchronous with calling terminal after detecting DwPTS, and receipt of call is set up signaling on descending time slot, judges whether it is call request to oneself.Call establishment further comprises: do not have the call establishment of affirmation and the affirmation call establishment is arranged.
Fig. 4 is not for there being the flow chart of confirming call establishment.
Do not have the calling procedure that the call establishment of confirming can be used for individual calling or group calling, so-called individual calling is meant the calling between unique user and the unique user, calls out to be present between two users; Group calling is meant one group of user of a customer call, is the communication between a plurality of users.
The call establishment of do not have confirming is a call establishment the most basic under the direct mode operation, and calling terminal is set up and called out, replying of waiting answering terminal not, but after sending repeatedly setup requests, directly begin to send business datum, its idiographic flow is as follows.
11) when certain terminal use determines to trigger calling (this terminal is as calling terminal), terminal applies layer (Calling User) sends straight-through control foundation request (DMCC-SETUP request) primitive of calling out to straight-through call control protocol layer (DMCC), the straight-through call control protocol layer (CallingDMCC) of notification call terminal begins to trigger a call flow, and is designated as the call establishment that does not have affirmation in primitive;
12) Calling DMCC handles DMCC-SETUP request primitive:
121) if require among the DMCC-SETUP request to set up new the calling, then Calling DMCC inquires about the state of current channel:
If current channel idle, then Calling DMCC triggers call establishment at once, carries out 13);
If current channel is busy, judges further that then current channel is in reservation (reserved) or takies (occupied) state, and judge whether to trigger preemption processes;
If current channel the unknown, Calling DMCC replys application layer DMCC and discharges Indication message (DMCC-RELEASE indication), the current request of refusal application layer;
122) if request continues current calling among the DMCC-SETUP request, then Calling DMCC inquires about the state of current channel:
If current channel condition is reserved, Calling DMCC judges whether to meet the condition (described right of speech transfer process is seen below literary composition) that right of speech is transferred the possession of process that triggers, if meet, then trigger right of speech and transfer the possession of process, if do not meet, then send DMCC-RELEASE indication to application layer, the setup requests that refusal is used;
If current channel condition is occupied, Calling DMCC judges whether to meet the condition (described right of speech preemption processes is seen below literary composition) that triggers preemption processes, if meet, then trigger preemption processes, if do not meet, then send DMCC-RELEASE indication to application layer, the setup requests of refusal application layer;
13) the Calling DMCC tissue common control information and the straight-through call set up signaling (DM-SETUP PDU) that will issue, and indication lower floor (DM-DM-MAC) sends descending synchronous code, other-end can be carried out synchronously and obtains the information that issues on the channel; Send common control information at TS0, send DM-SETUP PDU at TS3 simultaneously; The DM-MAC layer is responsible for the repeating transmission of PDU message, sends 8 times DM-SETUP PDU in continuous subsequent frame, so that all terminals can receive call setup message;
14) send after the data, DM-MAC sends the result to calling DMCC report data, and:
Send the data success if bottom reports, then Calling DMCC will send DMCC call setup acknowledge message (DMCC-SETUP confirm) to application layer, and the success of notice application layer call setup can send data; Simultaneously calling DMCC enters the activation data transmit status, owing to be non-affirmation mode, thereby DMCC do not wait for that the affirmation of peer layer replys, and only needs the bottom indication to send successfully and gets final product;
If bottom reports the transmission data failure, Calling DMCC will send DMCC and discharge Indication message (DMCC-RELEASE indication) to application layer, report this call establishment failure, and the reason of indication failure;
15) the straight-through call control protocol layer (Called DMCC) of answering terminal is received DM-SETUPPDU, judge whether the protocols having mistake, if there is mistake, then called DMCC will abandon the PDU that receives, otherwise indication DMCC-SETUP indication is to the user application layer of answering terminal;
16) if application layer is agreed to receive current calling, then send primitive DMCC-SETUP response to DMCC, DMCC is provided with lower floor and enters data receiving state; If application layer can't receive current calling, send DMCC-RELEASE request to DMCC, DMCC returns idle condition, does not send response message to sending terminal yet answer terminal D MCC.
Fig. 5 has the flow chart of confirming call establishment.Generally, there is the call establishment of affirmation only to be applicable to the individual calling process.The call establishment that affirmation is arranged is after calling terminal makes a call the request of setting up, and replying of waiting answering terminal begun to send afterwards business datum.Idiographic flow is:
21) when certain terminal use determines to trigger calling, the terminal applies layer sends DMCC-SETUP request primitive to DMCC, and notice Calling DMCC begins to trigger a call flow, and is designated as the call establishment of affirmation in primitive;
22) Calling DMCC handles DMCC-SETUP request primitive:
221) if require among the DMCC-SETUP request to set up new the calling, then Calling DMCC inquires about the state of current channel:
If current channel idle, then Calling DMCC triggers call establishment at once, carries out 23);
If current channel is busy, judges further that then current channel is in reserved or occupied state, and judge whether to trigger preemption processes;
If current channel the unknown, Calling DMCC replys application layer DMCC-RELEASEindication, the current request of refusal application layer;
222) if request continues current calling among the DMCC-SETUP request, then Calling DMCC inquires about the state of current channel:
If current channel condition is reserved, Calling DMCC judges whether to meet the condition (described right of speech transfer process is seen below literary composition) that right of speech is transferred the possession of process that triggers, if meet, then trigger right of speech and transfer the possession of process, if do not meet, then send DMCC-RELEASE indication to application layer, the setup requests of refusal application layer;
If current channel condition is occupied, Calling DMCC judges whether to meet the condition (described right of speech preemption processes is seen below literary composition) that triggers preemption processes, if meet, then trigger preemption processes, if do not meet, then send DMCC-RELEASE indication to application layer, the setup requests of refusal application layer;
23) Calling DMCC tissue common control information that will issue and the straight-through call set up signaling DM-SETUP PRES PDU that affirmation is arranged, and indication lower floor sends descending synchronous code can carry out synchronously other-end and obtain the information that issues on the channel; Send common control information at TS0, send DM-SETUP PRES PDU at TS3 simultaneously; The DM-MAC layer is responsible for the repeating transmission of PDU message, sends 8 times DM-SETUP PRES PDU in continuous subsequent frame, so that all terminals can receive call setup message;
24) send after the data, DM-MAC sends the result to calling DMCC report data, and:
Send the data success if bottom reports, then Calling DMCC will start timer, the response message of waiting answering terminal;
If bottom reports the transmission data failure, Calling DMCC will send DMCC-RELEASEindication to application layer, report this call establishment failure, and the reason of indication failure;
25) Called DMCC receives DM-SETUP PRES PDU, judges whether the protocols having mistake, if there is mistake, then called DMCC will abandon the PDU that receives, otherwise indication DMCC-SETUPindication is to the user application layer of answering terminal;
26) if application layer is agreed to receive current calling, then send primitive DMCC-SETUP response to DMCC; If application layer can't receive current calling, then send DMCC-RELEASE request to DMCC;
27) if called DMCC receives the DMCC-RELEASE request that application layer sends, calledDMCC will indicate lower floor to send refusal and set up the information (DM-DISCONNECT PDU) of calling connection to calling terminal, the reason that the indication refusal is called out, and return idle condition;
If called DMCC receives the DMCC-SETUP response that application layer sends, calledDMCC will indicate lower floor to send and set up the affirmation information (DM-CONNECT PDU) of calling connection to calling terminal, after the indication DM-CONNECT PDU of lower floor has sent success, called DMCC starts timer, waits for replying of master terminal;
28) calling DMCC will do following processing according to the response result of the terminal called that receives:
If receive correct DM-CONNECT PDU, then calling DMCC will stop timer, and indication lower floor sends response message (DM-CONNECT-ACK PDU) to the described terminal of answering, send primitive DMCC-SETUP confirm simultaneously to application layer, indication application layer call establishment successfully finishes, and enters data transmission state of activation;
If what receive replys the PDU for DM-DISCONNECT, DMCC will stop timer, and indication lower floor sends calling release information (DM-RELEASE PDU) to the described terminal of answering, send primitive DMCC-RELEASE indication simultaneously to application layer, the failure of notice application layer call establishment, and indicating call is set up the reason of failure;
If there is mistake in replying of receiving, the perhaps timer expiry of calling DMCC, then DMCC will stop timer, and the transmission DM-RELEASE PDU of indication lower floor arrives from terminal, send primitive DMCC-RELEASE indication simultaneously to application layer, the failure of notice application layer call establishment, and indicating call is set up the reason of failure;
29) called DMCC will do following processing according to replying of the master terminal of receiving:
If correctly obtain DM-CONNECT ACK PDU, then called DMCC stops timer, sends primitive DMCC-COMPLETE indication to application layer, and indication application layer call establishment successfully finishes, and enters the Data Receiving state of activation;
If what receive replys the PDU for DM-RELEASE, DMCC stops timer, sends primitive DMCC-RELEASE indication to application layer, the failure of notice application layer call establishment, and the reason of indicating call foundation failure, Called DMCC returns idle condition;
If there is mistake in replying of receiving, perhaps timer expiry, then DMCC stops timer, send primitive DMCC-RELEASE indication to application layer, the failure of notice application layer call establishment, and the reason of indicating call foundation failure, Called DMCC returns the idle state;
If in the timer timing course, answer terminal and find that calling terminal sends identical DM-SETUPPRES PDU, restart call establishment, then the zero clearing of calling terminal timer restarts call establishment.
Confirm and have in the process of confirming call setup in above-mentioned nothing, each terminal can be searched on the frequency that presets when having data to send, and judges whether channel resource is occupied, if unoccupiedly then be provided with own to be master terminal, can to avoid the problem of timing conflict so to a certain extent; On the other hand, if two terminals all detect the idle concurrent data of sending of resource simultaneously, then can cause timing conflict, in this case, for the call establishment that affirmation is arranged, then have only a terminal can obtain this at most and answer the affirmation information that terminal is set up the calling connection, and then cause the failure of the call establishment of all the other terminals (or all terminals that make a call); For there not being the call establishment of confirming, timing conflict will cause trunked call normally to carry out, and in this case, the user can carry out new call establishment.
The principle of right of speech transfer is: after the business datum transmission of calling terminal finishes, the channel resource of calling terminal release busy at once, but timer Treserved is set, and send to call out termination message (DM_TX_CEASED) notice and answer the data of this calling terminal of terminal and sent and finish, channel enters the reserved state, if the terminal of answering in the set of terminal has the demand that sends data, will initiate right of speech and transfer the possession of flow process, and transmitting channel takies request (DM_TX_REQUEST) message and makes a call to current calling terminal request, current calling terminal will be judged, if find that this request is effective, transmitting channel is taken grant message (DM_TX_ACCEPT PDU) give the described terminal of answering, and surrender the control of communication channel, answer terminal simultaneously and will change SOT state of termination, be set to calling terminal, obtain the control of link, begin to send data.
If after the time, not answering terminal has the demand that sends data at the Treserved of current calling terminal, if calling terminal also no longer needs to send data, then calling terminal is the channel of release busy, this time sign off, and all terminals are return idle condition.Fig. 6 transfers the possession of process flow diagram for right of speech, and with reference to Fig. 6, flow process is as follows:
31) after the data transmission of calling terminal application layer finishes, to send primitive and call out the request of stopping (DMCC-TX-CEASED request) to calling DMCC, the indicating services data send and finish, Calling DMCC revises the channel status of the common control information on the TS0, it is reserved that channel status is set, and the relevant information of modification channel, send DM-TX-CEASED message simultaneously to all terminals of answering, the business datum of answering the terminal call terminal with notice has sent and has finished, if calling terminal has the demand that sends business datum, then trigger right of speech and transfer the possession of process, master terminal is provided with timer Treserved simultaneously, waits for that answering terminal initiates right of speech transfer process;
32) after Called DMCC received DM-TX-CEASED message, the state that upgrades channel was reserved, and sent DMCC-TX-CEASED indication to application layer.
33) if called DMCC finds the current DM-SETUP request primitive that application layer sends that stores, perhaps during reserved, receive the DM-SETUP request primitive that application layer sends, then calledDMCC will begin to trigger right of speech transfer process, Called DMCC takies request (DM-TX-REQ PDU) to current calling terminal with transmitting channel, the control of request channel;
34) after Calling DMCC receives DM-TX-REQ PDU, carry out validity check, CallingDMCC takies the answer terminal of License Info (DM-TX-ACCEPT PDU) to request right of speech transfer with transmitting channel, send report (DMCC-REPORT indication) simultaneously to application layer, indicate current terminal to receive the request that right of speech is transferred the possession of, this calling terminal setting is in the state that receives business datum from as answering terminal then;
35) the described terminal of answering receives after the DM-TX-ACCEPT PDU of current calling terminal transmission, it is calling terminal that oneself state is set, and according to the content of application layer DM-SETUP request primitive, beginning does not have the call establishment of confirming or affirmation being arranged, after call establishment completes successfully, DMCC will send DM-SETUP confirm message to application layer, and the indication application layer is called out and set up success, can begin to send business datum;
36) if the described terminal of answering when waiting for the DM-TX-ACCEPT PDU message that master terminal sends, received the DM-SETUP PDU that other terminal sends, then this whether answer terminal judges be a new call establishment, or the continuity of last calling, if new call setup, then DMCC finishes to the last calling of application layer transmission DM-RELEASE indication indication application layer, and begin to handle new setup requests, if the continuity of last calling, then abandon the request of right of speech transfer, receive the setup requests of new calling terminal.
The principle of preemption processes is: when the business datum of calling terminal sends, the terminal of answering outside terminal or certain group in the group of current communication need take this Traffic Channel, and then triggering preemption processes, interrupt ongoing communication after the permission of acquisition master terminal, begin new business datum process; The terminal that request is seized can newly be set up a group calling or individual calling, also can be the continuity of current calling, just seizes to send professional right.Fig. 7 is the flow chart of preemption processes, and with reference to this figure, the preemption processes flow process is:
41) under the occupied situation of current channel, if the DMCC of certain terminal receives the DM-SETUPrequest primitive that application layer sends, then this terminal D MCC judges whether this call request is effective, if this call request has high priority, then DMCC triggers preemption processes, sends call seizing request (DM-PREEMPT PDU) to current calling terminal;
42) after current calling terminal is received the call seizing request, judge the validity of request, if effectively, then calling terminal sends call seizing License Info (DM-PREEMPT_ACCEPT PDU) to the terminal of initiating request, and carries out 43); Otherwise current calling terminal is refused this request;
43) Calling DMCC sends DM-RELEASE PDU and answers terminal to all, the release of indicating call, and current calling terminal DMCC is to application layer DMCC-RELEASE indication simultaneously, and the indication application layer is called out because seized and is discharged;
44) terminal of triggering preemption processes begins call establishment.
Dispose procedure is divided into normal dispose procedure and unusual dispose procedure, and main situation about being suitable for comprises: calling terminal sends data, enters the reserved state, after timer expiry, calling terminal sends DM-RELEASE message, and the notice application layer, returns idle condition; After the call request of terminal called refusal calling terminal, calling terminal sends DM-RELEASE message, the channel of release busy; Calling terminal allows seizing of other-end, and notice is answered terminal and discharged this calling; When calling terminal/answer terminal bottom (media access control layer/physical layer) occurs when unusual, trigger unusual dispose procedure.
Fig. 8 sends the normal dispose procedure flow chart that finishes for the calling terminal data, and with reference to this figure, its flow process is specially:
51) after the calling terminal application layer data sends and finishes, send primitive DMCC-TX-CEASEDrequest to calling DMCC, the indicating services data send and finish, Calling DMCC revises the channel status of the common control information on the TS0, be set to reserved, and the relevant information of modification channel, send DM-TX-CEASED message simultaneously to all terminals of answering, the business datum transmission that notice is answered the terminal call terminal finishes, if answer terminal the demand that sends business datum is arranged, can begin to trigger right of speech and transfer the possession of process; Master terminal is provided with timer Treserved simultaneously, the waiting answering terminal right of speech transfer that sets out;
52) after called DMCC receives DM-TX-CEASED message, be reserved, and send DMCC-TX-CEASED indication, answer terminal timer Treserved is set simultaneously to application layer with the state that current channel is set;
53) calling terminal DMCC is after timer Treserved is overtime, sends DM-RELEASE to answering terminal, and sends primitive DMCC-RELEASE indication to application layer, the end of indicating call process;
54) answer the DM-RELEASE message that terminal is received master terminal, perhaps, after the timer Treserved of self is overtime, send primitive DMCC-RELEASE indication to application layer, the indicating call process finishes, and returns idle condition.
Above-mentioned is signaling procedure embodiment among the present invention, in the present invention, change as if calling terminal in the call, then new calling terminal uses the scrambler of last calling terminal, because present embodiment is intended to solve the TD-SCDMA terminal and realizes trunking communication under no network environment, thereby use the existing employed scrambler of TD-SCDMA network in the present embodiment; The continuity that keeps frame number simultaneously.As indicated above, in the Ud frame structure, multi-frame structure is 16, so when certain calling terminal sends data, on Ts0, send current frame number information (0-15) simultaneously, after this calling terminal user is spoken end, answer terminal and can initiate right of speech transfer process, after last calling terminal is permitted this right of speech transfer request, can discharge the control of channel in the time of determining; The answering terminal and will become new calling terminal of described request right of speech transfer, during this time, former calling terminal will no longer send DwPTS and issue control informations such as frame number on TS0, but send DwPTS and on TS0, issue control information such as frame number by new calling terminal, new calling terminal will continue the frame number order of last calling terminal, to make things convenient for frame synchronization.
Among the present invention,, carry out access procedure earlier one time, carry out the synchronous of physical layer, be specially answering terminal before calling terminal sends message:
Answer terminal according to the calling terminal transmitting power Pt of calling terminal broadcasting and uplink synchronous sequence (SYNC_UL) the power P d of calling terminal expectation reception, and answer the calling terminal transmitting power Pr that terminal measures, calculate the transmitting power Pu of uplink synchronous code; Pu=Pd+Pt-Pr;
Answer terminal and send uplink synchronous code to calling terminal with Pu power;
After calling terminal is received uplink synchronous code, the power and the timing of this yard are compared with the power and the timing of described expectation, and comparative result is fed back to terminal by FPACH;
Answer the FPACH information of terminal (as 20ms) Waiting for Call terminal feedback in the regular hour;
Receive the FPACH of calling terminal feedback, answer transmitting power and the Timing Advance of terminal, send information to master terminal at predetermined channel according to power information among the FPACH and timing information adjustment oneself.
Answer terminal described in the present invention and determine the transmitting power of signal by open Loop Power control, as mentioned above, the open loop power control of native system adopts the mode the same with TD-SCDMA, the transmitting power of answering terminal will be according to the calling terminal transmitting power, the expectation received power of the last broadcasting of TS0 and answer terminal and measure resulting path loss and obtain; Described calling terminal remains maximum transmitting power.
More than the cluster communication method of a kind of mobile network terminal provided by the present invention is described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (15)
1, a kind of cluster communication method of mobile network terminal comprises calling terminal and answers terminal, it is characterized in that:
1) calling terminal sends downlink synchronous sequence; And issue call set up signaling, determine call group and group service type; And issue common control information;
2) answer terminal and detect downlink synchronous sequence on the business carrier frequency preset, synchronous according to described downlink synchronous sequence and calling terminal, and obtain described call set up signaling and common control information;
3) calling terminal sends business datum, answers terminal and obtains described business datum.
2, the cluster communication method of mobile network terminal as claimed in claim 1 is characterized in that:
1) be specially: calling terminal is the message blocks that the cycle sends downlink synchronous sequence and 1/4 call set up signaling with 5ms; Described synchronizing sequence is carried out and differs is the phase modulated of 90 degree, and with the message blocks corresponding to described 1/4 common control information, a modulation period of synchronizing sequence is corresponding to a complete common control information.
3, the cluster communication method of mobile network terminal as claimed in claim 2 is characterized in that:
Described 5ms is a subframe, and 2 subframes constitute the frame of a 10ms, and the frame of 16 10ms constitutes 1 multi-frame.
4, the cluster communication method of mobile network terminal as claimed in claim 3 is characterized in that:
In the subframe of each 5ms, calling terminal sends downwards public control information at the TS0 time slot; Send downlink dedicated data and signaling at TS3 to TS6 time slot; Answer terminal and send the uplink random access information at the TS1 time slot; And reservation TS2 time slot.
5, as the cluster communication method of one of them described mobile network terminal of claim 1 to 4, it is characterized in that:
Step 2) also comprises in: agree to set up this calling if answer terminal according to described call set up signaling, then send the affirmation information that connects of calling out of setting up to calling terminal;
2) with 3) between also comprise 4): calling terminal judges whether to receive that in first duration that presets answering terminal sets up the affirmation information that is connected of calling out, and as if receiving, then carries out step 3).
6, the cluster communication method of mobile network terminal as claimed in claim 5 is characterized in that:
4) further comprise in: after calling terminal obtains described confirmation, in second duration that presets, send the response message that obtains this confirmation to answering terminal.
7, the cluster communication method of mobile network terminal as claimed in claim 6 is characterized in that:
Described first duration equates with second duration.
8, the cluster communication method of mobile network terminal as claimed in claim 5 is characterized in that, 1) also comprise 5 before):
Judge whether the business carrier frequency that presets is occupied, if not, then be provided with certainly as calling terminal, and carry out step 1).
9, the cluster communication method of mobile network terminal as claimed in claim 8 is characterized in that, if Traffic Channel is occupied, then also further comprises:
Send business carrier frequency to the current calling terminal that takies business carrier frequency and take request, if the priority of this request is higher than current group call, then current calling terminal discharges this business carrier frequency, and described request takies the terminal setting of business carrier frequency certainly as calling terminal, and carries out step 1).
10, the cluster communication method of mobile network terminal as claimed in claim 8 is characterized in that:
Also comprise 6 after the step 3)): the calling terminal business datum issues the calling termination message after sending and finishing.
11, the cluster communication method of mobile network terminal as claimed in claim 10 is characterized in that:
Further comprise in the step 6): current calling terminal judges that whether answering terminal request in presetting duration makes a call; If have, then to answer terminal and send the request confirmation to this, this answers the terminal setting from as calling terminal, carries out step 1); Otherwise current calling terminal discharges channel resource.
12, the cluster communication method of mobile network terminal as claimed in claim 10 is characterized in that:
Calling terminal uses the scrambler of last calling terminal in the step 1).
13, as the cluster communication method of one of them described mobile network terminal of claim 10 to 12, it is characterized in that:
The frame number of last calling terminal is used in the calling terminal continuity in the step 1).
14, as the cluster communication method of one of them described mobile network terminal of claim 5 to 12, it is characterized in that:
Described calling terminal keeps maximum transmission power, and the described terminal of answering is by determining signal transmission power with the open Loop Power control of calling terminal.
15, as the cluster communication method of one of them described mobile network terminal of claim 5 to 12, it is characterized in that:
Answer terminal before calling terminal transmission information, in described channel, send uplink synchronous sequence and carry out uplink synchronous to calling terminal.
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| CNB2005100766825A CN100446592C (en) | 2005-06-13 | 2005-06-13 | Cluster communication method for mobile network terminal |
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| CNB2005100766825A CN100446592C (en) | 2005-06-13 | 2005-06-13 | Cluster communication method for mobile network terminal |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007112654A1 (en) * | 2006-03-31 | 2007-10-11 | Huawei Technologies Co., Ltd. | A method, system and device for realizing group communication |
| WO2009127132A1 (en) * | 2008-04-14 | 2009-10-22 | 华为技术有限公司 | A message distributing method, device and system |
| CN101137126B (en) * | 2007-02-07 | 2010-06-16 | 中兴通讯股份有限公司 | Group calling call mode automatically optimized method used for CDMA digital cluster system |
| CN102291838A (en) * | 2011-08-15 | 2011-12-21 | 海能达通信股份有限公司 | Methods and devices for sending and receiving high priority service in direct mode |
| US9781716B2 (en) | 2011-08-15 | 2017-10-03 | Hytera Communications Corp., Ltd. | High priority service sending and receiving method and device in direct mode |
| CN109005203A (en) * | 2017-06-06 | 2018-12-14 | 无锡雅座在线科技股份有限公司 | Method of data synchronization and device, storage medium, processor, terminal |
| CN110418415A (en) * | 2019-07-25 | 2019-11-05 | 哈尔滨海能达科技有限公司 | Shifting method, terminal, relay device and trunked communication system in trunked communication system signal |
| CN113709680A (en) * | 2020-05-20 | 2021-11-26 | 海能达通信股份有限公司 | Group calling method and cluster server |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1008563C2 (en) * | 1998-03-11 | 1999-09-14 | Concord Holding B V | Communication system. |
| CN1235418C (en) * | 2001-10-30 | 2006-01-04 | 中兴通讯股份有限公司 | Modile communicatoin system and its group service realizing method |
| CN1282315C (en) * | 2003-07-04 | 2006-10-25 | 中兴通讯股份有限公司 | Quick call establishing method of CDMA standard trunked communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2007112654A1 (en) * | 2006-03-31 | 2007-10-11 | Huawei Technologies Co., Ltd. | A method, system and device for realizing group communication |
| CN101137126B (en) * | 2007-02-07 | 2010-06-16 | 中兴通讯股份有限公司 | Group calling call mode automatically optimized method used for CDMA digital cluster system |
| WO2009127132A1 (en) * | 2008-04-14 | 2009-10-22 | 华为技术有限公司 | A message distributing method, device and system |
| US8856243B2 (en) | 2008-04-14 | 2014-10-07 | Huawei Technologies Co., Ltd. | Method, device, and system for message distribution |
| CN102291838A (en) * | 2011-08-15 | 2011-12-21 | 海能达通信股份有限公司 | Methods and devices for sending and receiving high priority service in direct mode |
| CN102291838B (en) * | 2011-08-15 | 2013-12-25 | 海能达通信股份有限公司 | Methods and devices for sending and receiving high priority service in direct mode |
| US9781716B2 (en) | 2011-08-15 | 2017-10-03 | Hytera Communications Corp., Ltd. | High priority service sending and receiving method and device in direct mode |
| CN109005203A (en) * | 2017-06-06 | 2018-12-14 | 无锡雅座在线科技股份有限公司 | Method of data synchronization and device, storage medium, processor, terminal |
| CN110418415A (en) * | 2019-07-25 | 2019-11-05 | 哈尔滨海能达科技有限公司 | Shifting method, terminal, relay device and trunked communication system in trunked communication system signal |
| CN113709680A (en) * | 2020-05-20 | 2021-11-26 | 海能达通信股份有限公司 | Group calling method and cluster server |
| CN113709680B (en) * | 2020-05-20 | 2023-10-24 | 海能达通信股份有限公司 | Group calling method and cluster server |
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| CN100446592C (en) | 2008-12-24 |
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