CN1642054A - Method for realizing integration husiness of channel using CDMA system - Google Patents
Method for realizing integration husiness of channel using CDMA system Download PDFInfo
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Abstract
The invention relates to a method bye the collection service by using the channel of the code division multiple access system. It includes the following steps that base station BS is broadcasted the collection service parameter information to all of the terminal MS in the dispatching group by forward direction common control channel; the MS is sent group call request information to the BS by the reverse direction common control channel, the BS is transmitted the one group or many broadcasting seeking calling information requested by the MS by the forward direction common control channel after it received the information; the reverse direction service channel and the shared forward service channel are established between the MS and the BS received the seeking calling information; the signaling and the service information of the MS are transmitted to the BS by respective reverse direction service channel; the BS is transmitted signaling to the MS by the forward direction service channel aimed at the MS, and broadcasted the service data of the collection service by the shared forward direction service channel. The method realizes that it is used the existing physical channel of the CDMA to realize collection service; it is no need to change the channel structure to make the influence to the original CDMA system reduce to the minimum.
Description
Technical field
The present invention relates to field of mobile communication, specifically, the channel that is meant a kind of employing code division multiple access system is realized the method for group service.
Background technology
In the public mobile network network, 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 portable terminal (MS) of above-mentioned two kinds of different business demands to need to 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, and channel type comprises Forward Pilot Channel (F-PICH), Forward Paging Channel (F-PCH), forward fundamental channel (F-FCH), Reverse Access Channel (R-ACH), Reverse Fundamental Channel (R-FCH).
| 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 are all MS numbers in the sub-district, and each MS has F-FCH 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 are all MS numbers in the sub-district, and each MS has R-FCH (occurring in pairs with F-FCH) separately | ????/ |
Table 1
As seen from Table 1, conference telephone system does not have optimization to air interlace channel, use the two-way channel of plain old telephone, each MS will take a F-FCH and a R-FCH, do not utilize the characteristic of air interlace channel, and do not utilize the broadcasting characteristics of wireless transmission and the half-duplex characteristic of group service, the Radio Resource utilization rate is lower; The MS connecting time and the time of seizing are longer, can not realize quick access.
Channel operating position based on the VoIP mode of grouped data can be divided into two classes, one class is to use fundamental service channel, MS sends the packet voice packet and receives forward broadcast and uses independent F-FCH and R-FCH separately, the two-way channel that is similar to conference telephone system is used, if there are a plurality of MS in the sub-district, to take fundamental service channel in a large number, and the MS number 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 Reverse Access Channel/Reverse Enhanced Access Channel/Reverse Common Control Channel (R-ACH/R-EACH/R-CCCH) as MS, base station (BS) is by Forward Paging Channel/forward broadcast control channel/Forward Common Control Channel (F-PCH/F-BCCH/F-CCCH) broadcasting ip voice bag.Therefore the VoIP mode based on grouped data requires to support VoIP to MS, and the handshaking procedure more complicated need to realize to insert (Instant Access) signaling protocol fast, 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, utilize still that original channel directly transmits MS information 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 the method for the channel realization group service of a kind of employing code division multiple access (CDMA) system, make under the situation that does not change the cdma system channel architecture, realize the channel support of group service.
The present invention includes following steps:
Base station BS is by Forward Common Control Channel all terminal MS broadcasting group service parameter messages in dispatch group;
MS initiates to group busy or the group calling request message to BS by Reverse Common Control Channel, and BS receives after this message group sending by Forward Common Control Channel that MS requires or a plurality of groups broadcast paging messages;
Receive the forward traffic channel of setting up reverse traffic channel and sharing between the MS of described beep-page message and BS, the signaling of MS and business information send to BS by reverse traffic channel separately, BS transmits signaling by the forward traffic channel at each MS to each MS, and broadcasts the business datum of group service by the forward traffic channel of sharing.
Wherein, this method further comprises, in the group service use, by reverse power control subchannel the forward traffic channel of sharing is carried out power control between BS and the MS; By forward direction power control subchannel reverse traffic channel is carried out power control.
Wherein, the described reverse power control subchannel of this method is carried on the R-PICH channel that Reverse Dedicated Control Channel R-DCCH follows.
Wherein, the described forward direction power control of this method subchannel is carried on the Forward Dedicated Control Channel F-DCCH subchannel.
Wherein, the described forward direction power control of this method subchannel is carried on the subchannel of Forward Common Power Control Channel F-CPCCH.
Wherein, this method comprises that further each MS sends frame error rate FER by reverse traffic channel to BS, after BS receives the FER of also comprehensive each MS, adjusts the transmitting power of the forward traffic channel of sharing.
Wherein, this method comprises that further each MS sends forward direction power control bit FPC by reverse power control subchannel to BS, and the base station receives the FPC of also comprehensive each MS, adjusts the transmitting power of the forward traffic channel of sharing.
Wherein, this method comprises that further if there is MS feedback request BS to improve the shared service channel transmitting power, then BS improves the shared service channel transmitting power; If all MS feedback request BS reduce the shared service channel transmitting power, BS just reduces the shared service channel transmitting power.
Wherein, the described Forward Common Control Channel of this method is mapped on Forward Paging Channel/Forward Quick Paging Channel F-PCH/F-QPCH.
Wherein, the described Reverse Common Control Channel of this method is mapped on Reverse Access Channel/Reverse Enhanced Access Channel R-ACH/R-EACH.
Wherein, the described forward direction signaling of this method transmits by Forward Dedicated Control Channel F-DCCH.
Wherein, the described shared forward traffic channel of this method be mapped to that forward fundamental channel F-FCH goes up or forward complement channel F-SCH on.
Wherein, described each user's of this method reverse traffic channel is mapped on each user's the Reverse Dedicated Control Channel R-DCCH.
Wherein, described shared forward traffic 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.
Wherein, described Walsh sign indicating number carries out scrambling according to dispatch group sign ID.
Wherein, described group service comprises: voice group service, circuit data group service and grouped data group service.
The present invention uses the channel of cdma system to realize the method for group service, use the existing physical channel of cdma system to realize group service, can coexist with former cdma system such as cellular phone service, by reasonable disposition cdma system channel resource, utilize existing common signal channel and proprietary traffic channel resource, channel architecture is not had transformation, the influence of former cdma system is dropped to minimum.Because realized cdma system supporting cellular and cluster dual mode simultaneously, the user can be switched between cellular services and group service easily.Compare and original group service pattern, and also have the following advantages:
1, owing to uses the corresponding increase of user capacity in the shared channel mode system;
Whether 2, the original handoff mechanism of cdma system has guaranteed the mobility and the continuous effective of terminal traffic, no matter oppositely converse or idle condition all can be supported;
3, because reverse traffic channel has adopted separately independently R-DCCH mode, support the online all the time of privilege terminal, guarantee intrusion, toll breakdown the realization of function.
Description of drawings
Fig. 1 carries out the call flow of group calling for dispatch group.
Embodiment
The present invention utilizes the original physical channel in the cdma system, and the physical channel support that is fit to group service is provided.It is as follows that wherein the physical channel of the single sector of cdma system is formed the mode of group service channel, and at first the group service with speech business is an example, and the composition of the channel of group service is described.
1) Forward Common Control Channel (Common Control Channel):
| Channel type | Preferred number |
| ????F-PICH | ????1 |
| ????F-SYNCH | ????1 |
| ????F-PCH | 2 (maximum 7) |
| ????F-QPCH | ????3 |
Table 2-1
As show shown in the 2-1, the Forward Common Control Channel of group service is mapped on Forward Paging Channel/Forward Quick Paging Channel (F-PCH/F-QPCH), according to configurable one or more F-PCH/F-QPCH of telephone traffic.MS at first receives the basic synchronization information that BS sends by Forward Pilot Channel (F-PICH), demodulate the forward direction synchronizing information then, system configuration parameters such as the F-PCH/F-QPCH information acquisition system parameters that then just can demodulation BS sends, access parameter, Neighboring Cell List, these belong to shared overhead information.When the Traffic Channel of group service was not set up as yet, the MS that is in idle condition received paging information that BS sends and at the specific information of specific MS, comprises signaling information by F-PCH/F-QPCH.
2) forward traffic channel (Traffic Channel):
| Channel type | Quantity |
| ????F-FCH | 1/Group (one every group) |
| ????F-DCCH | 1/user (one of every user) |
Table 2-2
As show shown in the 2-2, the group service forward traffic channel is mapped on the forward fundamental channel (F-FCH), and F-FCH is as shared service channel radio shared service data in communication process, and business datum comprises voice, circuit data and middle low speed packet data.
After setting up Traffic Channel, communication system is set up a Forward Dedicated Control Channel (F-DCCH) for each MS, group service forward direction signaling sends by the F-DCCH of corresponding each MS, and wherein, described forward direction signaling comprises the user profile of this MS and the signaling information that control is resolved.In addition, it is service-data oriented that F-DCCH also can be used to transmit burst, and the transmission that is used for replenishing forward business in following each table, no longer describes.
As follows for the circule power control method as the F-FCH of shared service channel: each MS has independently Reverse Dedicated Control Channel (R-DCCH); When cluster is conversed, each MS transmits frame error rate (FER) or forward direction power control bit (FPC) by R-DCCH channel separately to BS, it is forward link power control feedback information, after BS receives, FER or FPC information that comprehensive each MS sends, adjusting this F-FCH is group service shared service channel transmitting power, drops to minimum with the frame error rate that guarantees each user.Can use the strategy of " have to rise then to rise, high-fall just fall " to carry out the adjustment of power, that is, as long as there is a MS feedback request BS to improve the shared service channel transmitting power, then BS just improves this shared service channel transmitting power; Only at all MS when all feedback request BS reduces the shared service channel transmitting power, BS just reduces this shared service channel transmitting power.
3) Reverse Common Control Channel (Common Control Channel):
| Channel type | Quantity |
| ????R-ACH/R-EACH | Article 1～32 ,/F-PCH (every F-PCH can correspondingly dispose 1～32 R-ACH) |
Table 2-3
As show shown in the 2-3, the group service Reverse Common Control Channel is mapped on Reverse Access Channel/Reverse Enhanced Access Channel (R-ACH/R-EACH), configurable one or more R-ACH/R-EACH.When not setting up the Traffic Channel of group service with BS as yet, MS sends information by R-ACH/R-EACH to BS, and responds the paging information that BS issues MS specially, comprises the signaling message of the group service relevant with setting up Traffic Channel.
4) reverse traffic channel (Traffic Channel)
| Channel type | Quantity |
| ????R-DCCH | ????1/user |
Table 2-4
After setting up Traffic Channel, reverse traffic data and backward signaling be time-sharing multiplex on the R-DCCH channel, or transmits simultaneously according to the Multiplex Option Multiplex Option of protocol definition.
As show shown in the 2-4, the reverse traffic channel of group service is mapped on the Reverse Dedicated Control Channel (R-DCCH), after the group service reverse traffic channel was set up, system was each MS foundation R-DCCH separately, and each MS transmits the group service data by R-DCCH separately to BS.R-DCCH can support discontinuous emission (DTX) mode, to save power, to reduce system interference.
After setting up Traffic Channel, in the cluster communication process, the R-DCCH that each MS sets up by BS and each MS, to user and signaling information that BS transmits, for example backward channel is seized signaling etc.
The power control mode of reverse traffic channel is as follows: after setting up Traffic Channel, when cluster is conversed, the reverse link power control feedback information (RPC) of corresponding reverse traffic sends to each MS by BS by forward traffic channel (F-DCCH), transmission rapid power control information, control the adjustment of each MS emission power control, the forward direction power control subchannel that carries reverse power control information is carried on F-DCCH channel (multiplexing with hole knockout), and each MS has a corresponding unique F-DCCH channel; The power control mode is identical with cdma system reverse traffic channel rapid power control method.
Sum up the above, the corresponding relation of group service logic channel and physical channel is shown in table 2-5:
| Logic channel | Forward direction | Oppositely |
| Signaling | Before setting up Traffic Channel: F-PCH; After setting up Traffic Channel: F-DCCH (by one of every user's DCCH Channel Transmission) | Before setting up Traffic Channel: R-ACH/R-EACH; After setting up Traffic Channel: R-DCCH (by one of every user's DCCH Channel Transmission) |
| Professional | F-FCH (1 every group is shared and uses) | By one of every user's R-DCCH Channel Transmission, professional and signaling time-sharing multiplex on the R-DCCH channel; Or transmit simultaneously according to the Multiplex Option Multiplex Option of protocol definition |
| Power control | Send to BS by MS by R-DCCH, the reverse power control subchannel that carries forward direction power control information is carried on R-DCCH channel (multiplexing with hole knockout), (each MS has independently R-DCCH channel) | Send to MS by BS by F-DCCH, the forward direction power control subchannel that carries reverse power control information is carried on F-DCCH channel (multiplexing with hole knockout), (each MS has independent F-DCCH channel) |
Table 2-5
Wherein, the distribution method of the physical channel of group service speech business also can be as shown in the table, with the just no longer narration of corresponding identical each table of table 2, below only provides different tables.
With table 2-2 different table: forward traffic channel (Traffic Channel) and power control subchannel (Power Control Subchannel)
| Channel type | Quantity |
| ????F-FCH | 1/Group (one every group) |
| ????F-DCCH | 1/Group (one every group) |
| ????F-CPCCH | F-CPCCH can further be divided into subchannel, and each subchannel can carry the power control information (seeing Table 3-2-1) of issuing a MS |
Table 3-2
2-2 compares with table, further can comprise Forward Common Power Control Channel (F-CPCCH) in the group service channel, for each user distributes a subchannel among the F-CPCCH, the subchannel of F-CPCCH is used for transmitting RPC, is used for carrying out when cluster is conversed reverse power control.Can only distribute a F-DCCH to carry out sharing in the cluster group in this case, be mainly used to transmit the forward business signaling, also can be used for replenishing forward traffic channel and transmit the burst service data.
Wherein, shown in table 3-2-1, F-CPCCH can support the subchannel of varying number according to the difference of power control bit rate:
| Power control speed (bps) | Power control number of subchannels (number of subchannels that each bar F-CPCCH supports) |
| ????800 | ????24 |
| ????400 | ????48 |
| ????200 | ????96 |
Table 3-2-1
From table 3-2-1 as can be known, each bar F-CPCCH can carry minimum 24 (800bps), the individual power control subchannel of maximum 96 (200bps), such F-CPCCH just can substitute the task to a plurality of MS transmission power control information that original many F-DCCH just can finish, saved the Walsh resource, also reduced the consumption of forward channel power, thus capacity that can elevator system.
Accordingly, the corresponding relation of group service logic channel and physical channel is shown in table 3-5:
| Logic channel | Forward direction | Oppositely |
| Signaling | Before setting up Traffic Channel: F-PCH; After setting up Traffic Channel: F-DCCH (the DCCH channel by every group transmits in time-multiplexed mode) | Before setting up Traffic Channel: R-ACH/R-EACH; After setting up Traffic Channel: R-DCCH (by one of every user's DCCH Channel Transmission) |
| Professional | F-FCH (1 every group is shared and uses) | By one of every user's DCCH Channel Transmission, professional and signaling time-sharing multiplex on the R-DCCH channel; Or transmit simultaneously according to the Multiplex Option Multiplex Option of protocol definition |
| Power control | Send to BS by MS by R-DCCH, the reverse power control subchannel that carries forward direction power control information is carried on R-DCCH channel (multiplexing with hole knockout), and each MS has independently R-DCCH channel | Send to different MS by BS by F-CPCCH, the forward direction power control subchannel that carries reverse power control information is carried on the F-CPCCH subchannel, and each MS has a corresponding unique F-CPCCH power control subchannel |
Table 3-5
Being example with the PTT talk business in the group service below, with reference to table 2-1, is that example illustrates with a speech business of dispatching group.When initially setting up PTT in the cell/section of supporting the PTT business at cdma system when professional, promptly MS initiates 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:
Step 100: support the sectors/cells base station of PTT business in Overhead Message, to increase a PTT service parameters message, send the PTT service parameters message by Forward Common Control Channel all MS in dispatch group that are mapped to F-PCH/F-QPCH, to broadcast the PTT tenability of this sub-district.
Step 101: group calling/when grouping busy, MS sends to the base station by the R-ACH/R-EACH Reverse Common Control Channel and grouies busy or group calling message when arbitrary MS initiates; The base station sends the group calling broadcast paging messages by Forward Common Control Channel after receiving this message, perhaps sends many point-to-point beep-page messages at predefine user in the group.
Step 102: other MS receive group calling broadcast paging messages or point-to-point beep-page message, and set up preceding, reverse traffic channel between the base station, after Traffic Channel was set up, the signaling of current MS and business information sent to BS respectively by reverse traffic signaling channel and the reverse traffic channel that is mapped to same R-DCCH.
The base station is according to selected adding of MS of receiving by Reverse Common Control Channel or the parameter that does not add dispatch group situation and MS, by the assignment of Forward Common Control Channel transmitting channel, indicate this MS to set up reverse traffic channel, be used for MS and transmit the reverse traffic data to BS, this reverse traffic channel is mapped on the R-DCCH, only has a MS to converse when a dispatch group is oppositely conversed at any time.
Step 103: the base station is set up forward traffic channel and is promptly passed through a F-FCH as the shared service channel, is used for transmitting being scheduled and organizes the broadcast message that interior a plurality of MS receive, and comprises voice and circuit data and low speed packet data.BS also sets up the forward business signaling channel that is mapped to F-DCCH, carries out the transmission of signaling with corresponding M S.
For example, certain terminal A button application conversation, signaling is sent to BS by the R-DCCH that this terminal A and BS set up, BS by with dispatch server between terrestrial links relevant signaling is passed to dispatch server, after dispatch server is received message, send the application grant message to BS, BS passes to terminal A by the F-DCCH channel with terminal A foundation with signaling; The speech data of terminal A is sent to BS by R-DCCH, and speech data is broadcasted by F-FCH.
In the above-mentioned forward traffic channel, only use a shared F-FCH, wherein, use Walsh sign indicating number resource identification forward business shared channel, the distribution of Walsh sign indicating number is determined by the specific strategy of base station system, all MS of a scheduling group use a unique Walsh sign indicating number to set up forward shared channel, 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 (LCM) to carry out scrambling, wherein Long Code Mask obtains through specific algorithm such as cryptographic algorithm according to the ID of group, the shared F-FCH Long Code Mask of each cluster group is unique, therefore, can think that the Walsh sign indicating number carries out scrambling according to the ID of group.The Long Code Mask of reverse traffic channel R-DCCH both can use unique electronics string of each user of CDMA protocol definition number (ESN) or removable MS identification module (R-UIMID), the unique Long Code Mask of each user that also can use particular encryption algorithm to calculate, also can directly be transferred to MS by encrypted fields by the base station, encryption principle is similar to the privately owned Long Code Mask of cdma system and encrypts.
When MS switched, if be in the handover of the MS 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 MS makes handover in the non-conversation, be MS but still before having kept, reverse F/R-DCCH channel not in talking state, at this moment the handover of MS and the changing method in the communication process are basic identical, be that MS sends handoff request message on the R-DCCH channel, the base station switches to new sub-district with F-DCCH and R-DCCH channel down the auxiliary of MS, and notifying MS to monitor the shared F-FCH of new sub-district, the F-FCH of new sub-district can be identical with the F-FCH Walsh sign indicating number of former sub-district, also can be different.
For not in talking state and do not set up or set up but the current MS that has discharged F-DCCH and R-DCCH channel, its transregional handover mechanism is: the group channel parameter of MS adjacent area is notified in the base station with means of signaling in the process of MS adding group, MS can switch voluntarily like this, changing method is similar to the CDMA terminal that is in the IDLE state, its new position of informing base station as early as possible after MS switches voluntarily, Notification Method is not limit, and can adopt the trigger condition that is similar to the different registered type of cdma network in time to register new position.
More than describe with the group service of speech business.Use above physical channel allocating method, also can realize transmission of packet data.But because the characteristics of grouped data: less demanding to real-time, the probability of data burst transmission is bigger, therefore, preferable, can adopt following physical channel allocating method, reference table 2, channelling mode wherein only provides the table with the different configurations of table 2 as shown in showing down.
Forward business code channel (Traffic Channel)
| Channel type | Quantity |
| ????F-SCH | 1 or 2/Group (one every group or two is shared) |
| ????F-DCCH | 1/user (one of every user) |
Table 4-2
Reverse traffic channel (Traffic Channel):
| Channel type | Quantity |
| ????R-DCCH | ????1/user |
| ????R-SCH | ????1?or?2/user |
Table 4-4
Accordingly, the corresponding relation of group service logic channel and physical channel is shown in table 4-5:
| Logic channel | Forward direction | Oppositely |
| Signaling | Before setting up Traffic Channel: F-PCH; After setting up Traffic Channel: F-DCCH (by one of every user's DCCH Channel Transmission) | Before setting up Traffic Channel: R-ACH/R-EACH; After setting up Traffic Channel: R-DCCH (by one of every user's DCCH Channel Transmission) |
| Professional | F-SCH (1 every group or two is shared and uses) | By one of every user's R-DCCH Channel Transmission, professional and signaling time-sharing multiplex or transmit simultaneously on the R-DCCH channel according to the Multiplex Option Multiplex Option of protocol definition; Perhaps the R-SCH by one to two of every user transmits |
| Power control | Send to BS by MS by R-DCCH, the reverse power control subchannel that carries forward direction power control information is carried on R-DCCH channel (multiplexing with hole knockout), and each MS has independently R-DCCH channel | Send to MS by BS by F-DCCH, the forward direction power control subchannel that carries reverse power control information is carried on F-DCCH channel (multiplexing with hole knockout), and each MS has a corresponding unique F-DCCH channel |
Table 4-5
Wherein, forward complement channel (F-SCH) is supported dynamically to set up to be connected with endless, i.e. permanent connection mode, and therefore, at the grouped data characteristics, above forward traffic channel has adopted one or two F-SCH shared service channel as group service.Accordingly, adopted Reverse Dedicated Control Channel/reverse complemental channel (R-DCCH/R-SCH) at reverse traffic channel, wherein R-SCH can dynamically set up, and each MS can have one to two R-SCH Channel Transmission reverse traffic data.The channel F-SCH transmission of forward packet data stream by sharing, F-SCH can have one or two, and the shared channel Long Code Mask is identical with last example, can calculate through special algorithm such as cryptographic algorithm according to group ID; Reverse packet data is by one of every user's R-DCCH channel or the R-SCH transmission of dynamically setting up; F-SCH can realize that soft handover can not realize yet, realizes professional continuity by the high level such as the application layer of CDMA agreement.
This channelling mode not only can transmit the ordinary groups data, but also transport service quality (QoS) the multimedia service stream of having relatively high expectations comprises packet voice, as the voice messaging of VoIP or packetizing.
Wherein, the corresponding relation of group service logic channel and the physical channel distribution method that also can adopt and show 3-5 is carried out.In order to be fit to the characteristic of grouped data, forward traffic channel can adopt F-SCH to replace F-FCH among the table 3-5.
In like manner, when for voice with grouped data is concurrent when existing, in order better to transmit speech data and grouped data, different qualities according to speech data and grouped data provides corresponding QoS, reference table 4, the channelling mode of group service can adopt channelling mode as described below, only lists and the different table of table 4 configuration
Forward traffic channel (Traffic Channel) and power control subchannel (Power ControlSubchannel)
| Channel type | Quantity |
| ????F-FCH | 1/Group (one every group is shared) |
| ????F-SCH | 1 or 2/Group (one every group or two is shared) |
| ????F-DCCH | 1/user (one of every user) |
Table 5-2
Accordingly, the corresponding relation of group service logic channel and physical channel is shown in table 5-5:
| Logic channel | Forward direction | Oppositely |
| Signaling | Before setting up Traffic Channel: F-PCH; After setting up Traffic Channel: F-DCCH (by one of every user's DCCH Channel Transmission) | Before setting up Traffic Channel: R-ACH/R-EACH; After setting up Traffic Channel: R-DCCH (by one of every user's DCCH Channel Transmission) |
| Professional | F-SCH (1 every group or two is shared and uses) | By one of every user's R-DCCH Channel Transmission, professional and signaling time-sharing multiplex or transmit simultaneously on the R-DCCH channel according to the Multiplex Option Multiplex Option of protocol definition; Perhaps the R-SCH by one to two of every user transmits |
| Power control | Send to BS by MS by R-DCCH, the reverse power control subchannel that carries forward direction power control information is carried on R-DCCH channel (multiplexing with hole knockout), and each MS has independently R-DCCH channel | Send to MS by BS by F-DCCH, the forward direction power control subchannel that carries reverse power control information is carried on F-DCCH channel (multiplexing with hole knockout), and each MS has a corresponding unique F-DCCH channel |
Table 5-5
Wherein, forward traffic channel shown in the above-mentioned table has adopted one or two F-SCH and F-FCH shared service channel as group service, and to be fit to the concurrent transmission of speech data and grouped data: promptly the higher Business Stream of qos requirement is by sharing the F-FCH transmission; The Business Stream that qos requirement is low slightly or data volume is bigger is by sharing F-SCH.R-DCCH and R-SCH have been adopted at reverse traffic channel accordingly.The shared channel Long Code Mask can calculate according to group information via special algorithm such as ID such as cryptographic algorithm, forward shared channel can adopt identical or different Long Code Mask, interchannel is distinguished by the Walsh sign indicating number, the higher Business Streams of qos requirement such as reverse voice flow can be by one of every user's R-DCCH Channel Transmission, and R-DCCH supports soft handover; Reverse packet data transmits by R-SCH, and perhaps by R-DCCH hop or whole grouped data, R-SCH can dynamically set up, and every user sets up two R-SCH at most; F-SCH can realize switching and also can not realize, by high level such as the professional continuity of application layer realization of CDMA.
Wherein, the corresponding relation of group service logic channel and physical channel also can adopt the mode of table 3-5, and wherein, in order to be fit to the characteristic of voice and grouped data, forward traffic channel increases by one to two F-SCH on the original basis; Reverse traffic channel increases R-SCH on the original basis, and wherein each user distributes 2 R-SCH at most.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1, a kind of channel of employing code division multiple access cdma system is realized the method for group service, it is characterized in that this method may further comprise the steps:
Base station BS is by Forward Common Control Channel all terminal MS broadcasting group service parameter messages in dispatch group;
MS initiates to group busy or the group calling request message to BS by Reverse Common Control Channel, and BS receives after this message group sending by Forward Common Control Channel that MS requires or a plurality of groups broadcast paging messages;
Receive the forward traffic channel of setting up reverse traffic channel and sharing between the MS of described beep-page message and BS, the signaling of MS and business information send to BS by reverse traffic channel separately, BS transmits signaling by the forward traffic channel at each MS to each MS, and broadcasts the business datum of group service by the forward traffic channel of sharing.
2, method according to claim 1 is characterized in that, this method further comprises, in the group service use, by reverse power control subchannel the forward traffic channel of sharing is carried out power control between BS and the MS; By forward direction power control subchannel reverse traffic channel is carried out power control.
3, method according to claim 2 is characterized in that, the described reverse power control subchannel of this method is carried on the R-PICH channel that Reverse Dedicated Control Channel R-DCCH follows.
4, method according to claim 2 is characterized in that, the described forward direction power control of this method subchannel is carried on the Forward Dedicated Control Channel F-DCCH subchannel.
5, method according to claim 2 is characterized in that, the described forward direction power control of this method subchannel is carried on the subchannel of Forward Common Power Control Channel F-CPCCH.
6, method according to claim 2 is characterized in that, this method comprises that further each MS sends frame error rate FER by reverse traffic channel to BS, after BS receives the FER of also comprehensive each MS, adjusts the transmitting power of the forward traffic channel of sharing.
7, method according to claim 2 is characterized in that, this method comprises that further each MS sends forward direction power control bit FPC by reverse power control subchannel to BS, and the base station receives the FPC of also comprehensive each MS, adjusts the transmitting power of the forward traffic channel of sharing.
8, method according to claim 2 is characterized in that, this method comprises that further if there is MS feedback request BS to improve the shared service channel transmitting power, then BS improves the shared service channel transmitting power; If all MS feedback request BS reduce the shared service channel transmitting power, BS just reduces the shared service channel transmitting power.
9, method according to claim 1 is characterized in that, the described Forward Common Control Channel of this method is mapped on Forward Paging Channel/Forward Quick Paging Channel F-PCH/F-QPCH.
10, method according to claim 1 is characterized in that, the described Reverse Common Control Channel of this method is mapped on Reverse Access Channel/Reverse Enhanced Access Channel R-ACH/R-EACH.
11, method according to claim 1 is characterized in that, the described forward direction signaling of this method transmits by Forward Dedicated Control Channel F-DCCH.
12, method according to claim 1 is characterized in that, the described shared forward traffic channel of this method be mapped to that forward fundamental channel F-FCH goes up or forward complement channel F-SCH on.
13, method according to claim 1 is characterized in that, described each user's of this method reverse traffic channel is mapped on each user's the Reverse Dedicated Control Channel R-DCCH.
According to claim 1,12 described methods, it is characterized in that 14, described shared forward traffic 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.
15, method according to claim 14 is characterized in that, described Walsh sign indicating number carries out scrambling according to dispatch group sign ID.
16, method according to claim 1 is characterized in that, described group service comprises: voice group service, circuit data group service and grouped data group service.
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| CNA2004100005872A CN1642054A (en) | 2004-01-14 | 2004-01-14 | Method for realizing integration husiness of channel using CDMA system |
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