CN1549484A - Method for supporting concentration service multi-channel by CDMA system - Google Patents
Method for supporting concentration service multi-channel by CDMA system Download PDFInfo
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Abstract
The method for supporting cluster service multichannel for code division multiple address system includes the following steps: using forward basic channel or forward occupied control channel to create the forward shared channel, said forward shared channel is shared by all the terminals is schedule group, and assigning message to terminal transfer channel and instructing the terminal to create reverse service channel, said reverse service channel is configurated by using reverse basic service channel or reverse special-purpose control channel, if the schedule group is created or next cluster service is restarted by terminal or the forward shared channel of the schedule group is used for transferring broadcasting message, all the terminal having no privilege in the schedule group utilize several enhanced access channels and/or reverse quick access grabbing channel configurated by reverse public control channel to make access, and the service contents can be broadcast to all the terminals in the schedule group by means of forward shared channel.
Description
Technical field
The present invention relates to field of mobile communication, specifically, relate to and support the multi channel method of group service in the code division multiple access system.
Background technology
Move in the merit communication network the public, cellular system provides basic point-to-point duplex voice conversation system, group service such as specialty are dispatched, the push-to-talk (PTT of intercommunication function and provide, push to talk) group system exists with the form of private network, the professional providing capability and the mode of two kinds of systems have than big difference, cause the terminal of above-mentioned two kinds of different business demands need add two kinds of different networks, carry two kinds of different terminals, this makes troubles to terminal.
At present provide the group service method that the conference telephone mode is arranged and based on VoIP (the voice over IP) mode of grouped data based on cellular network.Wherein, the channel operating position of conference telephone system is as shown in table 1, channel type comprises Forward Pilot Channel (F-PICH), Forward Paging Channel (F-PCH, ForwardPaging Channel), Forward Fundamental Channel (F-FCH, Forward Fundamental Channel), Reverse Access Channel (R-ACH, Reverse Access Channel), reverse fundamental service channel (R-FCH, Reverse Fundamental Channel).
| Channel type | Conference telephone uses channel situation | Walsh sign indicating number (forward channel) |
| F-PICH | 1 | W 0 64 |
| F-PCH | 1～7, generally only dispose a F-PCH | W 1 64～W 7 64 |
| F-FCH | N (n=1～61), n is all number of terminals in the sub-district, each terminal all has Forward Fundamental Channel separately | W n 64(n＝1～63，RC3/RC5) W n 128(n＝1～127，RC4/RC6) |
| R-ACH | Paging channel number * (1～32), every generally speaking sector only disposes a F-PCH, a reverse R-ACH | / |
| R-FCH | N (n=1～61), n is all number of terminals in the sub-district, and each terminal all has reverse traffic channel (occurring in pairs with Forward Fundamental Channel) separately | / |
Table 1
As seen from Table 1, conference telephone system does not have optimization to air interlace channel, does not utilize the characteristic of air interlace channel, and does not utilize the broadcasting characteristics of wireless transmission and the half-duplex characteristic of group service, and the Radio Resource utilization rate is lower; The connecting time of terminal is longer, can not realize quick access.
Channel operating position based on VoIP (the voice over IP) mode of grouped data can be divided into two classes, one class is to use fundamental service channel, terminal sends the packet voice packet and receives forward broadcast uses independent F-FCH and R-FCH separately, the channel that is similar to conference telephone system uses, if there are a plurality of terminals in the sub-district, to take fundamental service channel in a large number, and the number of terminals of being supported is restricted because of the Walsh resource-constrained; Perhaps transmit the speech data that is packaged into the IP bag with the mode of Traffic Channel short message.The another kind of Common Control Channel that is to use can send the speech data that is packaged into the IP bag in the mode of short message by R-ACH as terminal, and the base station is by F-PCH broadcasting ip voice bag.Therefore based on the VoIP mode of grouped data demanding terminal is supported VoIP, the handshaking procedure more complicated needs to realize to insert fast (Instant Access) signaling protocol.And service quality (QoS) is difficult to guarantee.
In sum, conference telephone mode and all belong to the application of application layer in cellular system based on the VoIP mode of grouped data, still utilize the direct transmission terminal information of original channel in the cellular system, air traffic channel is not transformed, so existence is lower to wireless resource utility efficiency, service quality is difficult to problems such as assurance, handshaking procedure complexity.
Summary of the invention
The object of the present invention is to provide a kind of multichannel method of in code division multiple access system, supporting group service,, provide the physical channel support that is fit to group service with under the situation that does not change the air traffic channel structure of utilizing code division multiple access system.
The present invention is achieved through the following technical solutions:
A kind of code division multiple access system is supported the multi channel method of group service, and this method may further comprise the steps:
If terminal is initiated group service first, then paging is carried out to other terminal in the dispatch group in the base station, take control channel with Forward Fundamental Channel or forward direction then and set up forward shared channel, this forward shared channel is that all terminals are shared in the dispatch group, and set up reverse traffic channel with indicating terminal to terminal transmitting channel assignment message, this reverse traffic channel disposes with reverse fundamental service channel or Reverse Dedicated Control Channel, a unique terminal is carried out group service by reverse traffic channel in the dispatch group, and business information is by forward shared channel all terminal broadcasting in dispatch group;
If set up dispatch group, or terminal is initiated group service next time again, or the forward shared channel of dispatch group is just sending broadcast, then all ex privileges terminals insert by seizing channel with oppositely inserting fast of a plurality of reverse enhancing access channels or Reverse Common Control Channel configuration in the dispatch group, and dispose corresponding Forward Common Control Channel, public access channel of forward direction and Forward Common Control Channel, dispatching desk in the dispatch group is determined the unique terminal that can carry out group service at the reverse traffic passage according to the priority of terminal, this terminal is carried out group service by reverse traffic channel, and business information is by forward shared channel all terminal broadcasting in dispatch group;
After terminal call finishes, remain on idle condition, monitor Common Control Channel and forward shared channel simultaneously, discharge the reverse airlink of its use, keep the reverse traffic channel resource, wait for the other-end conversation, perhaps initiate group service next time again.
This method further comprises, the forward direction periodic broadcasting that foundation is carried on physical channel inserts the enable logic channel, constantly detect Reverse Access Channel message by this logic channel base station, periodically send the wireless chaining status of dispatch group at forward shared channel, terminal determines whether to send the request of access according to the access state of this dispatch group.
This method comprises that further online if the privileged trading terminal keeps, then privilege terminal remains the monitoring to common signal channel, and many reverse traffic channels of base station maintain are given different privilege terminals respectively.
This method further comprises, if privilege terminal does not have professional requirement, privilege terminal is closed the reverse traffic channel of use, keep the R-PICH channel, the R-PICH channel is launched in the gate mode, and keep in touch with the base station, if business need is arranged, privilege terminal directly sends business datum on reverse traffic channel.
Privilege terminal directly sends business datum on reverse traffic channel step comprises that privilege terminal sends the forced interposing and forced releasing order to dispatching desk by button, and dispatching desk discharges occupied reverse traffic passage according to signaling content epistasis.
Privilege terminal directly sends business datum on reverse traffic channel step comprises, after the base station detects the business of privilege terminal transmission, the privilege terminal business tine is inserted forward direction shared service channel by force, discharge the channel resource that is carrying out professional ordinary terminal, enable periodically to send on the channel forward channel in the access of forward direction periodic broadcasting simultaneously and forbid access information.
This method further comprises, if terminal is made handover under idle condition, then the sub-district handover event takes place in terminal to report, whether the base station sets up forward shared channel according to new cell conditions decision, if the forward shared channel of new sub-district is identical with the forward shared channel content of former sub-district, then terminal is continued to use former forward shared channel, if the forward shared channel of new sub-district and the forward shared channel content of former sub-district are inequality, then notify terminal to begin to monitor the forward shared channel and the common signal channel of new sub-district.
This method further comprise seize access after, the base station sends and sets up message at the reverse traffic channel of this terminal, terminal is carried out the open loop estimation according to oppositely inserting the power of seizing channel fast, it is the open loop estimated value that the reverse traffic channel initial gain is set, in the enterprising words that work of former reverse traffic channel of distributing.
The present invention has realized supporting group service by the multichannel mode in code division multiple access system, can coexist with former cdma service, group service can be dropped to minimum to the influence of former cdma system by reasonable disposition system resource, made full use of the air traffic channel resource, provide the multiple terminals group group calling, group busy the channel support of function, also be applicable to point-to-point half-duplex secret conversation, and also have the following advantages:
1, utilizes existing common signal channel and proprietary Traffic Channel, channel architecture is not had transformation;
2,, can realize maintaining secrecy between the different dispatch group because reverse traffic channel uses specific Long Code Mask;
3, oppositely the multiple terminals sends and seizes/insert request, and dispatching desk is according to the access of terminal grade and priority control terminal;
Whether 4, handoff mechanism has guaranteed the mobility and the continuous effective of terminal traffic, no matter oppositely converse or idle condition all can be supported;
5, because reverse traffic channel has adopted multi channel mode, support the online all the time of privilege terminal, guarantee the realization of interposing function.
Description of drawings
Fig. 1 carries out the call flow of group calling for dispatch group.
Fig. 2 seizes flow process for the conversation of a plurality of ordinary terminals of same dispatch group.
Fig. 3 is the calling procedure of privilege terminal.
Fig. 4 is the Long Code Mask structure of forward shared channel;
Fig. 5 is the Long Code Mask structure of reverse traffic channel.
Embodiment
The present invention utilizes physical channel and the logic channel in the cdma system, and the physical channel support that is fit to group service is provided: special Forward Fundamental Channel (F-FCH) or Forward Dedicated Control Channel (F-DCCH) are hinted obliquely at and be forward direction shared service channel; Oppositely enhancing property access channel (R-EACH) or Reverse Common Control Channel (R-CCCH) are hinted obliquely at for reverse general access and are seized channel; Special reverse traffic channel (R-FCH) or Reverse Dedicated Control Channel (R-DCCH) are hinted obliquely at and are reverse traffic channel; And the logic channel that is carried on the CDMA physical channel hints obliquely at for the forward direction periodic broadcasting inserts and enables channel the physical channel support that is fit to group service is provided, and is example with the PTT talk business in group calling and the group service below, illustrates with a scheduling group.
When initially setting up PTT in the cell/section of supporting the PTT business at cdma system when professional, promptly terminal is initiated PTT when professional first, its flow process as shown in Figure 1, Fig. 1 carries out the call flow of group calling for dispatch group.Detailed process is as follows:
At first, step 100 supports the sectors/cells base station of PTT business to increase a PTT service parameters message in forward direction OverheadMessage, and all terminals send the PTT service parameters message in dispatch group, to broadcast the PTT tenability of this sub-district.
Then, step 101, when arbitrary terminal is initiated group calling/when grouping busy, terminal sends group calling/group busy that message, this terminal can be dispatching desks to the base station, also can be other terminal; Transmit to dispatching desk after receiving this message the base station, and other-end in this group is carried out paging, above-mentioned group calling/group busy that message can send by the broadcast paging messages of paging channel.
Secondly, step 102, forward shared channel is set up in the base station, this channel is special F-FCH or F-DCCH, in order to transmit the broadcast message that a plurality of terminals receive in the group that can be scheduled, wherein, F-FCH does not support discontinuous emission (DTX) mode, F-DCCH can support the DTX mode, to save power, to reduce and disturb; For unprivileged ordinary terminal, the base station is according to receiving that group calling/terminal selection of grouping busy adds or do not add the parameter of dispatch group situation and terminal, by common signal channel such as F-PCH, perhaps F-CCCH, perhaps forward shared channel transmitting channel assignment is indicated this terminal to set up reverse traffic channel and is sent the reverse traffic data, so that the reverse traffic data of terminal to be provided, this reverse traffic channel is the TDM mode, and a dispatch group oppositely only has a terminal to converse at any time.For the privilege terminal that adds the PTT conversation first, a reverse traffic channel and contact all the time will be set up in privilege terminal and base station.
In the above-mentioned forward shared channel, use Walsh sign indicating number resource identification forward shared channel, this Walsh sign indicating number resource is identical with voice terminal, the distribution of Walsh sign indicating number is determined by the specific strategy of base station system, all terminals of a scheduling group are used a unique Walsh sign indicating number, distinguish with different Walsh sign indicating numbers between the different dispatch group.For having certain privacy functions, the Walsh sign indicating number uses specific Long Code Mask to carry out scrambling, and the formation of Long Code Mask as shown in Figure 4; The use of Long Code Mask is by base station system and terminal agreement, and this Long Code Mask is unique; The Long Code Mask of group is notified all terminals in this dispatch group respectively by assignment or cipher mode, and for example, Long Code Mask can perhaps calculate by cryptographic algorithm according to random parameter through encrypting (ciphertext) transmission by eating dishes without rice or wine.Because the terminal at diverse location place can both be received forward broadcast in the professional half-duplex of PTT/single worker's characteristics and the treatment cell coverage area, forward direction shared service channel does not have closed-loop power control, the transmitting power of forward shared channel is fixed on some set-points, the transmission power setting size guarantees that the sub-district covers edge termination and can receive reliably, and actual numerical value can gain with reference to paging channel power (F-PCH).
The Long Code Mask of reverse traffic channel both can use electronics string number (ESN)/movable termination identification module (R-UIMID) of CDMA protocol definition, also can use the Long Code Mask of this scheduling group forward shared channel, perhaps distribute to terminal by encrypted fields by the base station, also can calculate according to cryptographic algorithm, principle is encrypted identical with the privately owned Long Code Mask of cdma system.The Long Code Mask form of reverse traffic channel as shown in Figure 5, reverse traffic channel uses reverse power control in the communication process, oppositely the power control subchannel is carried by forward shared channel.
Then, step 103, when terminal push application conversation, after dispatching desk was confirmed, terminal was conversed at reverse traffic channel, and dialog context is broadcasted at forward shared channel by dispatching desk exchange back.
At last, step 104, when the ordinary terminal talk-through first time, remain on the free time (Idle) state, monitor Common Control Channel and forward shared channel simultaneously, and reverse traffic channel gain G ain=0 is set, the emission of the R-PICH of temporary close simultaneously, keep reverse traffic channel, wait for the other-end conversation or initiate new of short duration conversation again; Next time is when conversing, seize access by access channel, the base station sends and sets up message at the reverse traffic channel of this terminal, terminal is carried out the open loop estimation according to the power of access channel, it is the open loop estimated value that the reverse traffic channel initial gain is set, in the enterprising words that work of former reverse traffic channel of distributing; Base station side remains R-FCH or the R-DCCH channel resource of setting up dispatch group, but only in terminal distribution just begin to catch and demodulation during reverse traffic channel; Channel parameter need be done corresponding change when different terminals was conversed at every turn.
Generally speaking, a reverse traffic channel is only kept to a dispatch group in the base station, but support privilege terminal such as dispatching desk to keep online if desired, the base station can be kept many reverse traffic channels and be given different privilege terminals respectively, when conversation does not require, reverse traffic channel remains on class control and keeps (ControlHold) state, promptly, only launch pilot tone to keep in touch by R-PICH with the base station in gate (Gating) mode, the base station is with the reverse power control bit of power control subchannel transmission of public public control channel (F-CPCCH), if the conversation requirement is arranged, privilege terminal will directly send business datum on reverse traffic channel, do not need not seize Reverse Access Channel with ordinary terminal through a plurality of states such as " sending the request of access; confirm request; oppositely conversation ".Therefore, privilege terminal is connected because of remaining with the reverse link of base station, and its state has reverse when conversation free time (Idle) state and the class Control Hold state when not having conversation, and no matter terminal will remain monitoring to common signal channel under that a kind of state.
For ordinary terminal, if set up dispatch group at the cell/section of supporting the PTT business, perhaps the forward shared channel of same dispatch group is sending broadcast message, perhaps terminal is initiated call request next time, terminal is seized access by access channel, as shown in Figure 2, Fig. 2 seizes flow process for the conversation of a plurality of ordinary terminals of same dispatch group.Detailed process is as follows:
Step 200, in the sub-district of setting up the PTT dispatch group, the forward shared channel of dispatch group is set up, Overhead Message message is by the dispatch group information of Forward Paging Channel broadcast cell, the dispatch group that adds expectation when terminal to apply, dispatching desk and terminal are verified the validity of dispatch group and terminal in the mode of unidirectional authentication or bi-directional authentification, and send the information such as channel parameter (comprising the forward shared channel parameter) of dispatch group on Forward Paging Channel by the base station; Perhaps the forward shared channel of a dispatch group is sending broadcast message;
Step 201, ordinary terminal is oppositely seized request message by a plurality of R-EACH or the transmission of R-CCCH channel of disposing, and disposes F-CCCH, F-CACH and the F-CPCCH that needs with R-EACH or R-CCCH pairing use; Also can preengage by R-EACH, on R-CCCH, send packet, the content of packet can be the speech data in short message or cycle a period of time, this speech data is compressed to be transmitted with higher rate, all terminals are seized reverse access and are seized channel to send a request message in same dispatch group terminal or the sector, the process that its access is seized and the access procedure of code division multiple access system are identical, in inserting preemption processes, need the transmitting power of last access exploration to be used as the factor that open loop power is estimated when on the one hand, the terminal reverse traffic channel is launched; On the other hand, the base station can be provided with the initial ranging of reverse traffic channel/catch parameter according to the search parameter in the access procedure.Dispatching desk sends the affirmation message of access channel message by Forward Common Control Channel.
Above-mentioned R-EACH or R-CCCH not only support time slot A LOHA agreement, and reservation ALOHA (Reservation ALOHA) access protocol is provided, and can provide higher access success rate when the multiple terminals burst inserts, turn-on time also corresponding reducing; A plurality of R-EACH of configuration and/or R-CCCH, and F-CCCH, F-CACH and F-CPCCH can support a dispatch group or all dispatch group under the same sub-district.
Step 202, dispatching desk determines that according to the information such as priority of terminal a certain terminal can converse at the reverse traffic passage, and by forward common channels or forward shared channel transmission forward channel assignment message, to set up the reverse traffic passage and to send the reverse traffic data; Set up the forward direction periodic broadcasting simultaneously and insert the enable logic channel, be carried on the code division multiple access physical channel as on F-FCH or the common signal channel, constantly detect Reverse Access Channel message by this logic channel base station, the base station is with the wireless chaining status of periodic mode in forward shared channel transmission dispatch group, and basic access state has two kinds: allow to insert, forbid inserting; Terminal determines whether to send the request of access according to the access state of this dispatch group, and this can suitably reduce the interference of system reverse link, the possibility that the system loading when reducing reverse blockage further increases the weight of; Send the integral multiple of the desirable 80ms of cycle of Indication message.
Step 203, when terminal push application conversation, after dispatching desk was confirmed, terminal was conversed at reverse traffic channel, and dialog context is broadcasted at forward shared channel by dispatching desk exchange back.
Step 204 is identical with step 104.
For privilege terminal, the process of its calling as shown in Figure 3.Specific as follows:
Step 300～step 301, if the PTT privilege terminal is the group calling promoter of dispatch group, flow process is described identical among its process and Fig. 1, if privilege terminal is the entrant who has had the PTT dispatch group, then seize on the channel and send a request message in reverse general access, dispatching desk and privilege terminal are with the validity of the mode verification terminal of unidirectional authentication or bi-directional authentification, and on paging channel, send the information such as channel parameter (comprising the forward shared channel parameter) of dispatch group by the base station, send the affirmation message of access channel message then;
Step 302, dispatching desk sends the forward channel assignment message by the forward common channels or the forward shared channel of base station; Privilege terminal is set up reverse traffic channel according to channel parameter, and the reverse signal of demodulation privilege terminal is prepared in dispatching desk indication base station;
Step 303, if privilege terminal will be conversed, can carry out at any time, do not need by preempt-mode request conversation right, insert by forward direction forced interposing and forced releasing mode, dual mode can be arranged: a kind of is to send signaling to dispatching desk with special key, thereby dispatching desk determines whether intrusion according to the message content of signaling and/or tolls breakdown and carry out corresponding order; Another kind is as long as particular terminal sends speech information and signaling, the base station detects the back and according to signaling request dialog context or other information of privilege terminal is inserted forward direction shared service channel by force, the base station discharges the channel resource of the ordinary terminal of conversing simultaneously, the conversation of ordinary terminal will be interrupted by privilege terminal, insert at the forward direction periodic broadcasting simultaneously to enable periodically to send on the channel forward channel and forbid that access information seizes message to stop other ordinary terminals to send repeatedly.
If there are a plurality of privilege terminals, the intrusion of forward direction will determine to intercut a certain terminal information according to different and other information of priority by dispatching desk.
Step 304, privilege terminal is conversed at reverse traffic channel, and dialog context is broadcasted at forward shared channel by dispatching desk exchange back.
Step 305, the privilege terminal talk-through is closed the reverse traffic channel of use, keeps the R-PICH channel, and the R-PICH channel is with gate mode (Gating) emission, and oppositely the power control bit is by forward direction F-CPCCH channel bearing.
The dismounting of the channel of setting up can be removed when the termination of all PTT business of scheduling group among the present invention, and perhaps the dispatcher removes by force according to the priority of system.The interior privilege terminal quantity of dispatch group is determined according to factors such as system resource, wireless link condition, maintains 0～2 with every group and is advisable, and recommends only to keep one.
When terminal was switched, if be in the handover of the terminal in the reverse communication process, its handoff procedure was identical with the soft handoff procedure of cdma system, to guarantee speech quality and continuity; If be that terminal is made handover in the non-conversation, be that terminal does not oppositely have conversation, be in idle condition, monitor forward direction shared service channel, then striding the sub-district handover mechanism is: the sub-district handover event takes place in terminal to report, whether the base station sets up forward shared channel according to new cell conditions decision, if the forward shared channel of new sub-district is identical with the forward shared channel content of former sub-district, then terminal is continued to use former forward shared channel, if the forward shared channel of new sub-district and the forward shared channel content of former sub-district are inequality, then notify terminal to begin to monitor the forward shared channel and the common signal channel of new sub-district.
Channel use of the present invention and parameter situation thereof are as shown in table 2.
| Channel type | The size of frame (ms) | Data rate (bps) | Whether support the DTX mode | The number of channel of each sector | Walsh sign indicating number (forward path) | Remarks |
| F-PCH | ??20 | ??9600 ??/4800 | ??N | ??1～7 | W 1 64～W 7 64 | Spread spectrum speed 1; Common signal channel |
| F-QPCH | ??80 | ??4800 ??/2400 | ??Y | ??1～3 | W 80 128/W 48 128/W 112 128 | Spread spectrum speed 1; Common signal channel |
| F-CCCH | ???20 | ??9600 ??19200 ??38400 | ??/ | ??1 | W n N(N＝32，n＝1～31， 38400；N＝64， n＝1～63,19200； N＝128，n＝1～12 8,9600) | Spread spectrum speed 1; Common signal channel |
| F-CACH | ???5 | ??9600 | ??Y | 1～7/ sector | W n 128(n＝1～127，R＝1/ 2) W n 64(n＝1～63，R＝1/4) | Spread spectrum speed 1; Common signal channel |
| F-CPCC H | ???1.25 ???2.5 ???5.0 | ??800 ??400 ??200 | ??N | R-EACH number and R-CCCH number (maximum four of every sector) | W n 128(n＝1～127，No-O TD) W n 64(n＝1～63， OTD/STS) | Spread spectrum speed 1; Common signal channel |
| F-FCH | ???20 | ??9600 ??4800 ??2400... ??14400 ??... | ??N | 0～(N-1) (Forward Fundamental Channel of every dispatch group) | W n 64(n＝1～63，RC3/R C5) W n 128(n＝1～127， RC4/RC6) | Spreading Rate?1； Dedicated CH |
| F-DCCH | ???20 | ??9600 ??14400 | ??Y | ??0～(N-1) | W n 64(n＝1～63，RC3/R C5) W n 128(n＝1～127， RC4/RC6) | Spread spectrum speed 1; Common signal channel |
| R-CCCH | ???20 ???10 ???5 | ??38400 ??19200 ??9600 | ??/ | ???0～31 | / | Spread spectrum speed 1; The RC3/RC4 common signal channel |
| R-EACH | ???20 ???10 ???5 | ??38400 ??19200 ??9600 | ??/ | 0～31 (a plurality of R-EACH in every sector) | / | Spread spectrum speed 1; The RC3/RC4 common signal channel |
| R-FCH | ???20 ???5 | ?9600 ?4800 ?2400... ?14400 ?... | ??N | Every dispatch group keeps a reverse traffic channel | ??/ | Spread spectrum speed 1; The RC1/RC2 dedicated channel |
| R-DCC H | ???20 ???5 | ?9600 ?14400 | ??Y | 0.1.2.3.../group (recommending every group) | ??/ | Spread spectrum speed 1; The RC1/RC2 dedicated channel |
The above only is preferred embodiment of the present invention; not in order to restriction the present invention; although illustrate with voice calling service among the embodiment; channel of the present invention is not limited to carry normal speech business datum and signaling; can also transmission terminal and other good class of business data of system negotiates, as grouped data etc., within the spirit and principles in the present invention all; any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (19)
1, a kind of code division multiple access system is supported the multi channel method of group service, it is characterized in that this method may further comprise the steps:
If terminal is initiated group service first, then paging is carried out to other terminal in the dispatch group in the base station, set up forward shared channel with Forward Fundamental Channel or Forward Dedicated Control Channel then, this forward shared channel is that all terminals are shared in the dispatch group, and set up reverse traffic channel with indicating terminal to terminal transmitting channel assignment message, this reverse traffic channel disposes with reverse fundamental service channel or Reverse Dedicated Control Channel, a unique terminal is carried out group service by reverse traffic channel in the dispatch group, and business information is by forward shared channel all terminal broadcasting in dispatch group;
If set up dispatch group, or terminal is initiated group service next time again, or the forward shared channel of dispatch group is just sending broadcast, then all ex privileges terminals insert by seizing channel with oppositely inserting fast of a plurality of reverse enhancing access channels or Reverse Common Control Channel configuration in the dispatch group, and dispose corresponding Forward Common Control Channel, public access channel of forward direction and Forward Common Control Channel, dispatching desk in the dispatch group is determined the unique terminal that can carry out group service at the reverse traffic passage according to the priority of terminal, this terminal is carried out group service by reverse traffic channel, and business information is by forward shared channel all terminal broadcasting in dispatch group;
After terminal call finishes, remain on idle condition, monitor Common Control Channel and forward shared channel simultaneously, discharge the reverse airlink of its use, keep the reverse traffic channel resource, wait for the other-end conversation, perhaps initiate group service next time again.
2, method according to claim 1, it is characterized in that, this method further comprises, the forward direction periodic broadcasting that foundation is carried on physical channel inserts the enable logic channel, constantly detect Reverse Access Channel message by this logic channel base station, periodically send the wireless chaining status of dispatch group at forward shared channel, terminal determines whether to send the request of access according to the access state of this dispatch group.
3, method according to claim 1 and 2, it is characterized in that this method further comprises, and is online if the privileged trading terminal keeps, then privilege terminal remains the monitoring to common signal channel, and many reverse traffic channels of base station maintain are given different privilege terminals respectively.
4, method according to claim 1 and 2, it is characterized in that, this method further comprises, if privilege terminal does not have professional requirement, privilege terminal is closed the reverse traffic channel of use, keeps Reverse Pilot Channel, Reverse Pilot Channel is launched in the gate mode, and keep in touch with the base station, if business need is arranged, privilege terminal directly sends business datum on reverse traffic channel.
5, method according to claim 4, it is characterized in that, privilege terminal directly sends business datum on reverse traffic channel step comprises, privilege terminal sends intrusion and/or tolls breakdown order to dispatching desk with signaling method on reverse traffic channel by button, and dispatching desk is carried out corresponding order.
6, method according to claim 4, it is characterized in that, privilege terminal directly sends business datum on reverse traffic channel step comprises, after the base station detects the business of privilege terminal transmission, the privilege terminal business information is inserted forward direction shared service channel by force, discharge the channel resource that is carrying out professional ordinary terminal, enable periodically to send on the channel forward channel in the access of forward direction periodic broadcasting simultaneously and forbid access information.
7, method according to claim 1, it is characterized in that, this method further comprises, if terminal is made handover under idle condition, then the sub-district handover event takes place in terminal to report, whether the base station sets up forward shared channel according to new cell conditions decision, if the forward shared channel of new sub-district is identical with the forward shared channel content of former sub-district, then terminal is continued to use former forward shared channel, if the forward shared channel of new sub-district and the forward shared channel content of former sub-district are inequality, then notify terminal to begin to monitor the forward shared channel and the common signal channel of new sub-district.
8, method according to claim 1, it is characterized in that, this method further comprise seize access after, the base station sends and sets up message at the reverse traffic channel of this terminal, terminal is carried out the open loop estimation according to oppositely inserting the power of seizing channel fast, it is the open loop estimated value that the reverse traffic channel initial gain is set, in the enterprising words that work of former reverse traffic channel of distributing.
9, method according to claim 1 is characterized in that, described terminal comprises that by the reverse step of seizing the channel access that inserts fast terminal is oppositely seized request message by reverse enhancing access channel to the dispatching desk transmission and inserted with realization.
10, method according to claim 1, it is characterized in that, described terminal comprises by oppositely inserting the step of seizing the channel access fast, by reverse enhancing access channel reservation, send the packet that constitutes by short message or the speech data in cycle a period of time at reverse public its control channel and insert with realization.
11, method according to claim 1 is characterized in that, described channel assignment message sends by Common Control Channel or forward shared channel.
12, method according to claim 1 is characterized in that, the transmission power setting of described forward shared channel is a set-point.
13, method according to claim 1 is characterized in that, described forward shared channel uses a unique Walsh sign indicating number with Walsh sign indicating number sign, all terminals of same dispatch group, distinguishes with different Walsh sign indicating numbers between the different dispatch group.
14, method according to claim 13 is characterized in that, described Walsh sign indicating number uses specific Long Code Mask to carry out scrambling.
15, method according to claim 1 is characterized in that, described reverse traffic channel adopts Long Code Mask.
16, method according to claim 1 is characterized in that, uses reverse power control at reverse traffic channel described in the communication process.
17, method according to claim 1 is characterized in that, described oppositely fast the access seized channel and offered a scheduling group, or a plurality of dispatch group in sector, perhaps all dispatch group.
18, method according to claim 1 is characterized in that, the reverse airlink step of described its use of release further comprises, the emission of temporary close Reverse Pilot Channel, and it is 0 that the reverse traffic channel gain is set.
19, method according to claim 1 is characterized in that, described group service can be voice group service and/or data cluster business.
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| CNB031365183A CN100499424C (en) | 2003-05-22 | 2003-05-22 | Method for supporting cluster service multi-channel by CDMA system |
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