CN1859794A - Method for realizing broadcast multicast service in mobile communication system - Google Patents
Method for realizing broadcast multicast service in mobile communication system Download PDFInfo
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Abstract
The present invention discloses mobile communication realizing Broadcast and Multicast Service BCMCS method. Said method includes configuring support BCMCS function in MS application layer, application layer supporting BCMCS functional MS with affiliated base station BS making BCMCS relevant information carried application layer message interaction, MS receiving affiliated BS through forward sharing channel broadcast program. Said method can realize BCMCS in mobile communication system through soft ware downloading without modifying MS sublayer.
Description
Technical field
The present invention relates to realize the technology of data service, particularly a kind of method that realizes BroadCast MultiCast Service (BCMCS) in mobile communication system in mobile communication system.
Background technology
Mobile communication system as code division multiple access (CDMA) system or Wideband Code Division Multiple Access (WCDMA) (WCDMA), can provide BCMCS.The mobile communication system network side utilizes the broadcast multi-broadcasting mode that BCMCS is provided content, and travelling carriage (MS) receives the BCMCS content that the mobile communication system network side provides.The BCMCS of mobile communication system can make a plurality of MS share the system resource and the frequency resource of mobile communication system, and mobile communication system just can provide various information for a large amount of MS with less system resource.
The broadcast capability that utilizes mobile communication system to provide has dual mode: Idle state broadcasting and business state broadcasting in the mobile communication system of the employing BCMCS interface transmission aloft BCMCS.Idle state broadcasting is exactly that MS receives the BCMCS content under idle condition, between MS and the mobile communication system except setting up shared channel, do not set up the connection of other Dedicated Traffic Channels, Idle state broadcasting can be saved the system resource of mobile communication system to greatest extent, but the technology of realization more complicated.Business state broadcasting, be also referred to as traffic channel state broadcasting, be meant that MS is when receiving the BCMCS content, except and mobile communication system between the shared channel set up, also to set up Dedicated Traffic Channel, comprise that fundamental service channel (FCH) or Dedicated Control Channel (DCCH) connect, the system resource of business state broadcasting waste mobile communication system, but the realization technology is fairly simple.
3GPP2 has formulated a series of CDMA2000 of utilization system, comprises that CDMA2000 1X and CDMA2000 1X EV-DO system realize the standard of BCMCS.Fig. 1 adopts the mobile communication system network structure chart of BCMCS for prior art: this system is made up of travelling carriage (MS), base station (BS), packet data control (PCF), broadcast service node (BSN), multicast router (MR), group data service network (PDSN), 3A server (AAA), BCMSC controller and content server.Wherein, MS is used for receiving the BCMCS content by BS, plays in real time, and simultaneously, MS is also mutual by PDSN and BCMCS controller, and PDSN can distribute Internet protocol (IP) address and port numbers for MS; BS comprises base transceiver station (BTS) and base station controller (BSC), realizes the air interface resource management of mobile communication system and the control of shared channel; PCF realizes being connected of BCMCS content between BSN and BS, realizes the connection of exclusive data Traffic Channel between PDSN and BS; BSN by the BCMCS content of MR reception from content server, carries out necessary protocol conversion, is transmitted to MS through PCF and BS; The BCMCS controller, the BCMCS configuration information that the BCMCS configuration information is provided and the MS that authentication passes through is provided to BSN by AAA to MS by PDSN; Content server provides BCMCS content, provides BCMCS content by MR to BSN; AAA preserves BCMCS authentication information, MS authentication information, transmits the BCMCS configuration information through authentication between BSN and BCMCS controller.
At present, realize that in mobile communication system BCMCS comprises following process: 1) service distribution or service discovering, the service provider can provide BCMCS by approach such as advertisement issue mobile communication system, and MS is known by all means; 2) service order, MS orders BCMCS to the mobile communication system network side, and the MS authentication information that mobile communication system will be ordered BCMCS writes among the AAA; 3) business information is obtained, and MS obtains the BCMCS relevant information by PDSN to the BCMCS controller, as: the sign of program stream (BCMCS_FLOW_ID), multicast IP address and port numbers, transport layer and application layer protocol and enciphered message etc.; 4) system parameters that BCMCS is relevant is obtained, the system parameters that BCMCS is relevant comprises: the program stream information that the MS current area can be used and the configuration parameter of shared channel etc., BS can send to MS with these parameters by dual mode: one, by the common signal channel of MS current area, for example paging channel and Forward Common Control Channel; Two, by and MS between the Dedicated Traffic Channel set up, this mode requires MS at first to initiate request to BS; 5) reception of BCMCS content, the BCMCS content of watching if MS wishes to listen to is broadcasted in current area, and then MS can directly receive forward shared channel, obtains the BCMCS content of broadcasting; If the current not broadcasting of the BCMCS content that MS wishes, then MS initiates request by call setup message or registration message to BS, and the BS that receives request sends the BCMCS content to MS; 6) foundation of BCMCS bearer path and release, BS, PCF and PDSN need ask, receive the information such as MS number of BCMCS content according to configuration information, the MS of mobile communication system, determine the foundation and the release of BCMCS bearer path, the BCMCS bearer path comprises that MS is to the shared channel between the BS, BS is to the A8 link between the PCF, PCF to the A10 link between the PDSN and PDSN to the connection between the content server.
Realize that in mobile communication system BCMCS had both supported Idle state broadcasting, also supporting business attitude broadcasting.
Because present MS does not support BCMCS, if realize BCMCS in mobile communication system, MS need make following function and expand: 1) physical layer of MS need be supported setting of forward shared channel Long Code Mask and support control function of power and the reverse pilot gate control function relevant with forward shared channel; 2) medium access control of MS (MAC) layer needs to support that the BCMCS data flow to the mapping of shared channel, be used to realize the part of eating dishes without rice or wine of the bearer path of BCMCS, and the Code And Decode that needs to support outer check code, be used for increasing error correction to the BCMCS content; 3) the 3rd of MS the layer of bearer path management and connection management that needs to support BCMCS, broadcast service parameter message (BSPM) and the broadcast service parameter message (ITBSPM) in the Traffic Channel that need to support to be used to obtain the relevant system parameters of the BCMCS of MS current area wait layer three message, need to support the BCMCS log-on operation and to the expansion of register information, need the BCMCS that supports newly-increased being used to that BCMCS information is provided to order (BCMCSOrder), also need expanding with lower floor's three message: the system parameters message of expansion (ExtendedSystem Parameters Message), whether instruct MS mobile communication system network side sends BSPM message and concrete sending time slots at common signal channel; The status response message (ExtendedStatus Response Message) of expansion comprises BCMCS professional ability support information; Call setup message (Enhanced Origination Message or Origination Message) is supported the broadcasting BCMCS content requests; Page-response message (Page Response Message), broadcast state and the relevant parameter of feedback MS; The channel assignment message (Extended Channel Assignment Message) of expansion is supported the shared channel assignment; System parameters message (In-Traffic SystemParameters Message) in the Traffic Channel indicates whether to support the broadcasting of Dedicated Traffic Channel; Power control messages (Power Control Message), the power control channel of indication forward shared channel; General handoff direction message (Universal Handoff Direction Message) supports to receive the switching of the MS that broadcasts.
Owing to realize in the process of BCMCS in mobile communication system, layer three message that relate to BCMCS are very many, and this just need carry out a large amount of modifications to the 3rd layer of MS, makes it support BCMCS.In addition, also have some BCMCS message to relate to physical layer and MAC layer, so also must make amendment to physical layer and the MAC layer of MS, development is very complicated and workload is big.
Indulge the above, in order to realize BCMCS in mobile communication system, the just bottom settings of modification MS in a large number, development is very complicated and workload is big.If redesign MS, then there is long, problem such as cost is high and style is few of cycle in order to support the BCMCS that mobile communication system provides.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method at mobile communication system realization BCMCS, and this method can realize BCMCS in mobile communication system under the situation of not revising the MS bottom.
According to above-mentioned purpose, technical scheme of the present invention is achieved in that
A kind ofly realize the method for BroadCast MultiCast Service BCMCS in mobile communication system, in the application layer of MS the function of supporting BCMCS is set, this method also comprises:
Carry between the MS that application layer is supported the BCMCS function and the affiliated base station BS application layer messages of BCMCS relevant information mutual after, the program Program that BS broadcasted by forward shared channel under MS received.
Described application layer messages is undertaken by the Dedicated Traffic Channel of setting up between MS and the affiliated BS alternately.
BS connects the charge information that duration produces MS according to the Dedicated Traffic Channel of being set up under the MS.
BS broadcasts by the paging channel of the sub-district of administering to the application layer messages that MS sends under the described MS.
When described MS sent the application layer message that carries the renewal of request transmission Program state to affiliated BS, this application layer messages was call setup message or the short message that carries called number;
BS returns the application layer messages that carries the Program state updating information under the MS, and this application layer messages is a short message.
When described MS sent the application layer messages that carries request broadcasting Program to affiliated BS, this application layer messages was call setup message or the short message that carries called number;
BS returns and carries the application layer messages that MS transmission request broadcasting Program replys under the MS, and this application layer messages is a short message.
Before described BS returned application layer messages, this method also comprised:
BS will give MS for the Dedicated Traffic Channel assignment that MS distributes under the MS, return application layer messages to MS for the Dedicated Traffic Channel of MS by assignment.
When the application layer messages that described MS sends to affiliated BS was short message, this short message carried telecommunication services identification ID or tagged word, and BS determines that by telecommunication services identification or tagged word that short message carries this short message is the short message that carries BCMCS information under the MS.
BS carries the application layer messages of Program state updating information by the paging channel broadcasting of administration sub-district under the described MS, and this application layer messages is a short message, and MS directly receives the Program state updating information by the paging channel of sub-district, place.
BS by the process of the Program of forward shared channel broadcasting was under MS received:
BS starts shared channel assignment back off timer Tshch under a, the MS;
B, MS set up User Data Protocol socket UDP SOCKET;
C, MS will add the multicast group with the UDP SOCKET that self sets up according to multicast IP address;
The assignment back off timer Tshch that BS is provided with under d, the MS is overtime, and BS will give MS by the assignment message assignment for the shared channel that MS distributes;
E, MS receive the Program that the mobile communication system network side sends by the shared channel of assignment.
Before step a, this method also comprises: BS is that MS distributes shared channel and terrestrial links resource under the MS, will be connected on the shared channel that distributes into MS from the Program that the MS request of packet data control PCF is broadcasted.
Before step a, this method also comprises:
BS under the mobile communication system network side direction MS initiates to start broadcasting instructions;
After BS under the MS receives this instruction,, will be connected on the shared channel of distribution from the Program of PCF for MS distributes shared channel and terrestrial links resource.
The multicast IP address of the described MS of step c be set in advance or carrying out distributing by PDSN in the process that ppp negotiation and IP consult with group data service network PDSN.
This method also comprises:
BS under f, the MS discharges being connected between MS and the PDSN.
When described MS was power control messages to affiliated BS transmission application layer messages, BS progressively improved the power of forward shared channel under the MS.
This method also comprises:
BS does not receive the power control messages that arbitrary MS sends under the MS in setting-up time, then progressively reduce the power of forward shared channel, administer power signaling message that arbitrary MS sends up to receiving or the power of forward shared channel is dropped to 0 according to the time interval that sets in advance and power step size.
MS subscribes to " Call Waiting " business that the mobile communication system network side provides, and in the process of the Program of BS broadcasting, also comprises the step of handling the calling incoming call under MS receives:
The calling incoming call is arranged during the Program of BS broadcasting under MS receives, BS stops to this MS broadcasting Program under the MS, changes that the calling incoming call is handled or prompting MS has the calling incoming call over to, whether stops to receive broadcasting Program by the MS decision, changes the calling incoming call over to and handles.
To support the application layer software of BCMCS to be stored in the mobile communication system network side, the process that described application layer at MS is provided with the function of supporting BCMCS be:
MS moves after downloading the application layer software of supporting BCMCS from the mobile communication system network side, is provided with to finish the function of supporting BCMCS.
From such scheme as can be seen, method provided by the invention is carried at the BCMCS relevant information in the application layer messages and sends, as is carried in short message or the call setup message and sends, thereby realizes BCMCS in mobile communication system.Because the present invention's BCMCS related news unlike prior art are set to bottom message, as physical layer, MAC layer and the 3rd layer, thereby do not need MS to revise the bottom setting, also can realize BCMCS in mobile communication system.
Description of drawings
Fig. 1 adopts the mobile communication system network structure chart of BCMCS for prior art;
Fig. 2 is the method flow diagram of Program state refresh of the present invention;
Fig. 3 is the method flow diagram of MS request of the present invention and reception Program;
Fig. 4 realizes the method flow diagram of static broadcasting for the present invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, below lift specific embodiment and, the present invention is described in more detail with reference to accompanying drawing.
Method provided by the invention is under the situation of not revising the MS bottom, make MS support the BCMCS that mobile communication system provides, no longer adopt the message of bottom to send the BCMCS relevant information, and directly adopt application layer messages to send, promptly between BS and MS, send and carry the application layer messages of BCMCS information.
Like this, MS is as long as support forward channel Long Code Mask function and the application software download function that BS is provided with, just can support to carry the function of the application layer messages of BCMCS information, thereby can carry out alternately with the application layer messages of mobile communication system network side by the BCMCS of carrying information provided by the invention.Certainly, MS also must have the basic capacity of the broadcasting supported, as supporting video broadcasting, MS just must have the picture decoding ability.
In the present invention, MS can get access to the function of the application layer messages of supporting to carry BCMCS from the mode of mobile communication system network side by software download.
In the present invention, still adopt system configuration shown in Figure 1, the BCMCS content is provided by content server, can be text, audio or video BCMCS data flow.The BCMCS data flow is identified by BCMCS_FLOW_ID, one or more BCMCS data flow constitute a program (Program), Program is identified by program ID (Program ID) and Program title, and the corresponding relation of Program and BCMCS data flow is kept in the BCMCS controller.It should be noted that, in the present invention, Program is not meant specific Program content, and is meant the carrier or the passage of a series of Program contents of carrying, be equivalent to the channel or the wireless broadcasting frequency of TV, also can be called " Program passage " or " channel ".
The broadcast mode that the present invention adopts is business state broadcasting, MS when receiving the BCMCS content, except with mobile communication system is set up being connected of shared channel, the connection that also will set up Dedicated Traffic Channel.The shared channel of setting up can replenish Code Channel (SCCH) for forward direction FCH, forward direction DCCH, forward complement channel (SCH) or forward direction, and the Dedicated Traffic Channel of foundation can be preceding inverted-F CH or DCCH.
When BS of the present invention was MS assignment forward shared channel, the method for notice MS used Long Code Mask or structure Long Code Mask when the demodulation forward shared channel made all MS that receive same Program all use identical Long Code Mask to come the demodulation forward shared channel.
The broadcast mode of Program has two kinds, dynamic broadcast and static broadcasting.Dynamic broadcast moves communication system network when being meant MS request broadcasting Program and just broadcasts Program, and when not having MS request broadcasting Program, the mobile communication system network side just discharges the system resource that broadcasting Program takies; Static broadcasting is meant no matter whether MS asks to broadcast Program, and the mobile communication system network side is all broadcasted predefined Program.Static broadcasting is a kind of reduction procedure of dynamic broadcast, if the mobile communication system network side has been supported dynamic broadcast, can support static broadcasting easily.Below respectively to adopt this two kinds of broadcast mode broadcasting as Program, the process that MS receives Program is elaborated.
The implementation method of dynamic broadcast
The operating process of dynamic broadcast comprises the power control of Program search, Program state refresh, Program request and reception, shared channel and stops step such as Program that MS can also handle the calling incoming call in receiving the Program process.Respectively these steps are described below.
The Program search step.Which the Program that MS can broadcast to mobile communication system network side inquiry mobile communication system has, and obtain the details of each Program, these details comprise: Program title, Program ID, corresponding BCMCS data flow ID, multicast IP address and port numbers and pay imformation etc.This step realizes with reference to the 3GPP2 standard that fully the Message Processing that relates to all realizes in application layer, therefore, do not need to revise the bottom setting of MS.
Program state refresh step.MS is listening to or/and before watching Program, at first understanding which Program plays, which Program can apply for is play, which Program temporarily can't play etc., these information send to MS by the BS of mobile communication system network side, Fig. 2 is the method flow diagram of Program state refresh of the present invention, and its concrete steps are:
The setup requests that step 200, MS carry called number to the BS initiation, request sends the Program state and upgrades.
In this step, the called number that MS carries when making a call, the former position of this number can set in advance special marking, separates in order to will ask to send calling and other the calling zone that the Program state upgrades, as at called number prefixing " * * * ".
In order to alleviate the workload of BS, avoid the called number that all callings are carried is analyzed, can make an appointment when sending the BCMCS relevant information with MS, the business option (SO) that makes a call and adopt, as adopt SO=33, like this, after BS receives call setup message, only for the calling of the SO that takes to arrange, just carry out the analysis of special marking, determine whether this calling carries the BCMCS relevant information, the concrete called number that carries according to this calling determines whether this calling is asked to send the Program state and upgraded again.
Step 201, BS are the MS Resources allocation, set up terrestrial links, give MS by assignment message with the Dedicated Traffic Channel assignment.
In this step, the terrestrial links of being set up are BSC among the BS and the link between the BTS, and assignment message is layer three message, but the process of this assignment is the mobile communication system existing standard, and MS also supports this function, so do not need to revise the bottom setting of MS.
Step 202, BS adopt short message to send the Program state updating information by the Dedicated Traffic Channel for the MS assignment to MS.
Because MS can receive short message in application layer, thereby does not need to revise the bottom setting of MS.
Step 203, MS therefrom parse the Program state updating information after receiving the short message of BS transmission.
The calling that step 204, MS release steps 200 are initiated.
In step 202, BS adopts short message to send the Program state updating information.In the prior art, BS does not handle short-message protocol, only the short message from mobile services switching centre (MSC) is carried out transparent transmission by data burst message (Data Burst Message).The field that Data Burst Message comprises has: message sequence number (MSG_NUMBER), data type (BURST_TYPE) (be 000011 o'clock be short message), message number (NUM_MSGS), message-length (NUM_FIELDS) and message content (CHARi).
In the present invention, in order to make BS can construct short message and to send, adopt fixing short message format to construct Data Burst Message, method is as follows: the first step, and it is 1 that MSG_NUMBER is set; In second step, it is 000011 that BURST_TYPE is set; In the 3rd step, it is 1 that NUM_MSGS is set; In the 4th step, following content (hexadecimal) is inserted in the CHARi field successively: (a) 00:SMS transport layer type of message, represent that this is a point-to-point short message, (b) 00,02, XX, XX: the telecommunication service id field, wherein XXXX is concrete telecommunication service ID, operator need specify a special telecommunication service ID for BCMCS is professional, (c) 02,06: the sign and the field length of short message sender address field, field length are 6, (d) XX, XX, XX, XX, XX, XX: the address of short message transmit leg, in the present invention, the short message transmit leg is BS, can adopt a special telephone number to identify, suppose to adopt 8 decimal numbers 12345678 as sender address, then 6 bytes here are followed successively by: 02,08,50, D9,61, C0.Also can adopt other numbers or other address modes, need these contents be set according to the IS-637 standard, length also might change, thereby has influence on the content of (c); (e) 08, n+9: the sign of data medium field and length, wherein n is the length of the BCMCS information of carrying in the short message; (f) 00,03,10,00,00: the message id son field in the data medium field, the present invention does not need to use message id, but this son field is essential in short message; (g) 10, n+2: the sign and the length of the user data son field in the data medium field, wherein n is the length of the BCMCS information of carrying in the short message; (h) XX, XX, XX, ...: and the content of user data son field, the BCMCS content that needs to send just is placed on here, the fill method of these contents is: with 00, n and BCMCS information constitute an array, regard the content of whole array as a binary digit string, this binary number 3 bits that move to left, and then with each byte setting the XX here in the array, XX, XX ....
Gou Zao short message is observed IS-637 standard (being 3GPP2 standard C .S0015) as stated above, and BS issues MS with Data Burst Message, and the application layer of MS just can be received short message.
BS is when structure Data Burst Message, need carry telecommunication service ID, what this telecommunication service ID can be used to identify Data Burst Message carrying is the BCMCS relevant information, after MS received Data Burst Message, just can judge this Data Burst Message according to the telecommunication service ID that Data Burst Message carries was BCMCS relevant information or other short message.The telecommunication service ID that is used to carry the short message of BCMCS relevant information can be specified by operator, according to the IS-41 regulation, can be an integer between 49152～65535.
Program request and reception.After MS selects certain Program, send request broadcasting Program to the BS of mobile communication system network side, BS replys to MS according to the system resource of current Program broadcasting situation and mobile communication system.In the MS side, if replying to asking success of receiving of MS, then MS sets up User Data Protocol socket (UDP SOCKET), and the UDPSOCKET that sets up is joined in the multicast group, so that receive the Program of broadcasting; In the mobile communication system network side, if the Program of MS request broadcasting is being broadcasted in sub-district, MS place, the BS that then administers this sub-district will carry the forward shared channel assignment of this Program to MS, if the Program of MS request broadcasting does not broadcast in sub-district, MS place, and system resource allows, and then BS is that MS divides the shared channel of the Program that is used in carrying MS request broadcasting and this shared channel assignment that will distribute to give MS.
Fig. 3 is the method flow diagram of MS request of the present invention and reception Program, and its concrete steps are:
Step 300, MS initiation SO are 33 the setup requests of carrying called number, request broadcasting Program.
In this step, the called number that MS carries when calling out, former positions can set in advance special marking, separate in order to calling and other the calling zone that will ask broadcasting Program.
Step 301, BS are the MS Resources allocation, set up terrestrial links, give MS by assignment message with the Dedicated Traffic Channel assignment, send A8 to PCF and set up request, connect between MS and PDSN.
In this step, handle according to the standard of existing mobile communication system.
Step 302, BS adopt short message to send replying of request broadcasting Program by the Dedicated Traffic Channel for the MS assignment to MS.
In this step, the mode of BS structure short message is similar to the mode of the described BS structure of Fig. 2 short message, the replying for request broadcasting Program of only carrying.
Step 303, BS are that MS distributes shared channel and corresponding terrestrial links resource, will be from the BCMCS data flow of PCF, i.e. and the Program of MS request broadcasting is connected on the shared channel that distributes into MS.
In this step, BS at first judges the Program whether has broadcasted in broadcasting MS request sub-district, MS place, if, then omit the process for MS distribution shared channel and corresponding terrestrial links resource of this step, otherwise that then carries out this step distributes the process of shared channel and corresponding terrestrial links resource for MS.
BS will judge also whether the Program of MS request broadcasting has been connected to BS, if connect, then initiates the A10 connection request of the Program of foundation carrying MS request broadcasting to PCF, will be connected to from the BCMCS data flow of PCF on the shared channel that distributes into MS; Otherwise that then omits this step initiates the operation set up the A10 connection request to PCF, directly will be connected to from the BCMCS data flow of PCF on the shared channel that distributes into MS.
Step 304, BS start shared channel assignment back off timer Tshch.
The reason that starts assignment back off timer Tshch is to carry out the assignment of shared channel immediately for MS because ppp negotiation between MS and the PDSN and IP consult also not finish, for the MS assignment can disturb these two processes behind the shared channel.
Step 305, MS set up UDP SOCKET after receiving that by short message receiving replying of Program broadcasted in the request of BS transmission.
Carry out ppp negotiation and IP between step 306, MS and the PDSN and consult, obtain the IP address, this IP address can be unicast or multicast IP address.
Carrying out before ppp negotiation and IP consult, PDSN can carry out authentication to MS, and PDSN is identical to the method for the MS authentication of carrying out the general data business in the method for authentication and the prior art.
This step is the standard step of existing mobile communication system.
Step 307, MS add the multicast group with the UDP SOCKET that self sets up.
The purpose that the UDP SOCKET that MS is set up joins the multicast group is to allow MS can receive multicast IP bag from shared channel, and the destination address of multicast IP bag is exactly multicast IP address.
When MS does not support multicast IP address setting, when promptly not supporting to add the operation of multicast group, PDSN should distribute multicast IP address for MS.
The assignment back off timer Tshch that step 308, BS are provided with is overtime, and BS will give MS by the assignment message assignment for the shared channel that MS distributes.
Assignment message is layer three message, but the process of this assignment is the existing standard of mobile communication system, and MS also supports this function, does not need to revise the bottom setting of MS.
Step 309, MS receive the Program that the mobile communication system network side sends by the shared channel of assignment, and promptly the UDP bag perhaps is called multicast IP bag, plays.
After MS receives the UDP bag, the UDP bag is carried out upper-layer protocol according to prior art, after for example (RTP) RTP handles, play: broadcast for Voice ﹠ Video, decode through the decoder of MS earlier according to prior art, the loud speaker broadcast and the display screen that are sent to MS again show; For text broadcasting, the display screen that then directly is sent to MS shows, like this, uses the user of MS just can see or/and heard the Program content.
Step 310, BS discharge the A8 link, thereby discharge being connected between MS and the PDSN, but do not discharge interface-free resources and terrestrial links.
The power control of shared channel.MS is when receiving the Program content, if it is on the low side to detect forward shared channel power, and then can be to BS transmission power control message, for example power measurement report, request improves transmitting power, and this is the operation that existing MS supports, so MS does not need to revise the bottom setting.
BS receive administer the power control messages that arbitrary MS sends after, under the situation that mobile communication system air interface resource situation and the factors such as power division principle that set in advance allow, progressively improve the power of forward shared channel.
If BS does not receive the power control messages that arbitrary MS sends in setting-up time, then progressively reduce the power of forward shared channel according to the time interval that sets in advance and power step size, administer power control messages that arbitrary MS sends up to receiving or the power of forward shared channel is dropped to 0, to save the system resource of mobile communication system.
MS has the calling incoming call during program receiving.MS is identical when using general data professional to the processing procedure of calling incoming call with MS when listening to or/and watching Program, and " voice are preferential " function of utilizing MS to set in advance guarantees not miss the calling incoming call.
MS is in order to realize not missing the calling incoming call, need to subscribe to " Call Waiting " business that the mobile communication system network side provides, like this, MS has the calling incoming call when listening to or/and watching Program, then mobile communication system stops to this MS broadcasting Program, the process or the prompting MS that change the calling incoming call over to have the calling incoming call, whether stop to receive broadcasting Program by the MS decision, change the process of calling incoming call over to.
If MS does not subscribe to " Call Waiting " business that mobile communication system provides, the calling incoming call is then arranged when listening to or/and watching Program, can't answer the calling incoming call, the initiator of calling can hear busy tone.
Stop to receive Program.The number of MS is given in the shared channel assignment that BS distributes by the counter records that self is provided with.When MS finishes to listen to or/and when watching Program, by and BS between the Dedicated Traffic Channel set up send call release message to BS, BS can be released to the Dedicated Traffic Channel of this MS assignment immediately, but the shared channel of giving this MS assignment then determines whether to discharge according to the number of the MS of self counter records: if the number of MS more than or equal to 2, then subtracts 1 with the number of the MS of self counter records and do not discharge this shared channel; If the number of MS is 1, then discharge this shared channel.Existing BS of call release message and MS support, so MS need not revise the bottom setting.
BS is discharging for behind the shared channel of MS assignment, also will judge whether to discharge the link circuit resource between BS and the PCF, and the method for inspection and release is according to the standard of prior art mobile communication system.
The implementation method of static broadcasting
The shared channel of static broadcasting is allocated in advance, no matter whether MS request broadcasting Program is arranged, Program also broadcasts by pre-assigned shared channel.
Static state broadcasting realizes the static method of broadcasting as shown in Figure 4 by the control of mobile communication system network side, and its concrete steps are:
After step 401, BS received this instruction, the step 303 in the execution graph 3: promptly BS distributed shared channel and corresponding terrestrial links resource, will be connected on the shared channel of distribution from the BCMCS data flow of PCF.
Like this, just can in the sub-district, broadcast Program by the shared channel that distributes.
When MS will ask to watch the Program of shared channel broadcasting of sub-district, place, initiate request broadcasting Program to BS, BS carries out according to the described step 304 of Fig. 3～step 310 and gets final product.
Except the described process of Fig. 4, the implementation method of static broadcasting is compared with the implementation method of dynamic broadcast, also has some difference: 1) MS can not watch or/and listen to the current not Program of broadcasting of the shared channel of sub-district, place; 2) in Program request and receiving course, do not need the Program that request is broadcasted according to MS again to distribute shared channel and application BCMCS data flow; 3) MS is when stopping to watch or/and listening to Program, and BS does not need to discharge the shared channel and the Program of sub-district, MS place.
Correspondingly, in the implementation method of static state broadcasting, also need the power of shared channel is controlled.For static state broadcasting, when not having MS to watch or/and listening to Program, though shared channel resources comprises WALSH sign indicating number and Channel Elements, occupied always, the forward power of shared channel can discharge, and offers other MS and uses.
The Poewr control method and the dynamic broadcast of static broadcasting are basic identical.Broadcast for static state, when just having begun to receive the Program broadcasted by shared channel by a MS, the power of this shared channel may be moved communication system and be provided with very low, therefore BS is when improving the power of shared channel, the step-length of power control strengthens, so that MS can receive the Program of broadcasting as soon as possible, when the power of shared channel reached the power of setting, BS reduced the step-length of power control again.
In the present invention, MS watches that or/and when listening to Program, keep being connected of Dedicated Traffic Channel with BS, BS can generate charge information according to the Dedicated Traffic Channel connect hours, and MS is chargeed.
In the present invention, the BS of mobile communication system network side can also be according to the Program state of current each sub-district, the short message of Program state updating information is carried in paging channel broadcasting by the sub-district, the described short message structure of the structure of this short message and Fig. 2 is similar, and the short message that difference is to adopt the class of service that sets in advance to identify this broadcasting is used to carry the BCMCS relevant information.When MS refreshes the Program state at needs, as long as receive the short message of place Cell Broadcast CB and obtain the Program state updating information by paging channel, do not need to initiate to carry the calling that request Program state upgrades to BS again according to the described step parsing of Fig. 2.
In the present invention, MS can not make a call when initiating request Program state renewal or request broadcasting Program to BS yet, but adopts the mode of short message.The MS existing capability is just supported the transmission of short message, then needs the present invention to be provided with but BS receives the process of short message, and the present invention has dual mode can realize that BS receives the short message that carries request Program state renewal or request broadcasting Program.
First kind of mode: analyze according to the short-message protocol that receives short message.BS at first parses telecommunication service ID after receiving the short message of MS transmission, determines according to telecommunication service ID whether this short message carries the BCMCS relevant information, if not, then handle according to general short message, otherwise, then resolve the request that this short message carries.
The second way: tagged word coupling.When MS carries the short message of request Program state renewal or request broadcasting Program in transmission, add tagged word, BS is when receiving short message, search for successively by the order of the bit in the short message, if the discovery tagged word is then determined this short message carrying BCMCS relevant information, parse the request that this short message carries, otherwise, then handle according to general short message.
In the present invention,, then revise PDSN, carry out ppp negotiation and IP when consulting at PDSN and MS, directly to MS distribution multicast IP address if MS does not support the reception of multicast IP bag.Distribute the process of multicast IP address to be: MS sets the PPP username and password, and the PPP user name can identify the BCMCS business, and password then can be used to carry the multicast IP address information of Program ID or Program correspondence.The PPP user name that PSDN sends according to MS judges whether and will carry out special processing to ppp negotiation and IP negotiations process that MS initiates: if the PPP user name has identified the BCMCS business, then the password that sends according to MS of PDSN is according to the rule searching that sets in advance or parse corresponding multicast IP address, distribute to MS, like this, MS just can receive multicast IP and wrapped.
In order in mobile communication system, to realize BCMCS, mobile communication system will support the application layer software of BCMCS to be stored in the mobile communication system network side, MS in mobile communication system will use BCMCS, download the application layer software of support BCMCS from the mobile communication system network side after, just Program can have been received.
Adopt method provided by the invention to realize BCMCS in mobile communication system, MS does not need to revise bottom setting or exploitation again, reduces development difficulty and development amount.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (18)
1, a kind ofly realize it is characterized in that the method for BroadCast MultiCast Service BCMCS that in the application layer of MS the function of supporting BCMCS is set, this method also comprises in mobile communication system:
Carry between the MS that application layer is supported the BCMCS function and the affiliated base station BS application layer messages of BCMCS relevant information mutual after, the program Program that BS broadcasted by forward shared channel under MS received.
2, the method for claim 1 is characterized in that, described application layer messages is undertaken by the Dedicated Traffic Channel of setting up between MS and the affiliated BS alternately.
3, method as claimed in claim 2 is characterized in that, BS connects the charge information that duration produces MS according to the Dedicated Traffic Channel of being set up under the MS.
4, the method for claim 1 is characterized in that, BS broadcasts by the paging channel of the sub-district of administering to the application layer messages that MS sends under the described MS.
5, the method for claim 1 is characterized in that, when described MS sent the application layer message that carries the renewal of request transmission Program state to affiliated BS, this application layer messages was call setup message or the short message that carries called number;
BS returns the application layer messages that carries the Program state updating information under the MS, and this application layer messages is a short message.
6, the method for claim 1 is characterized in that, when described MS sent the application layer messages that carries request broadcasting Program to affiliated BS, this application layer messages was call setup message or the short message that carries called number;
BS returns and carries the application layer messages that MS transmission request broadcasting Program replys under the MS, and this application layer messages is a short message.
As claim 5 or 6 described methods, it is characterized in that 7, before described BS returned application layer messages, this method also comprised:
BS will give MS for the Dedicated Traffic Channel assignment that MS distributes under the MS, return application layer messages to MS for the Dedicated Traffic Channel of MS by assignment.
8, as claim 5 or 6 described methods, it is characterized in that, when the application layer messages that described MS sends to affiliated BS is short message, this short message carries telecommunication services identification ID or tagged word, and BS determines that by telecommunication services identification or tagged word that short message carries this short message is the short message that carries BCMCS information under the MS.
9, the method for claim 1, it is characterized in that, BS carries the application layer messages of Program state updating information by the paging channel broadcasting of administration sub-district under the described MS, this application layer messages is a short message, and MS directly receives the Program state updating information by the paging channel of sub-district, place.
10, the method for claim 1 is characterized in that, BS by the process of the Program of forward shared channel broadcasting was under MS received:
BS starts shared channel assignment back off timer Tshch under a, the MS;
B, MS set up User Data Protocol socket UDP SOCKET;
C, MS will add the multicast group with the UDP SOCKET that self sets up according to multicast IP address;
The assignment back off timer Tshch that BS is provided with under d, the MS is overtime, and BS will give MS by the assignment message assignment for the shared channel that MS distributes;
E, MS receive the Program that the mobile communication system network side sends by the shared channel of assignment.
11, method as claimed in claim 10, it is characterized in that, before step a, this method also comprises: BS is that MS distributes shared channel and terrestrial links resource under the MS, will be connected on the shared channel that distributes into MS from the Program that the MS request of packet data control PCF is broadcasted.
12, method as claimed in claim 10 is characterized in that, before step a, this method also comprises:
BS under the mobile communication system network side direction MS initiates to start broadcasting instructions;
After BS under the MS receives this instruction,, will be connected on the shared channel of distribution from the Program of PCF for MS distributes shared channel and terrestrial links resource.
13, method as claimed in claim 10 is characterized in that, the multicast IP address of the described MS of step c be set in advance or carrying out distributing by PDSN in the process that ppp negotiation and IP consult with group data service network PDSN.
14, method as claimed in claim 10 is characterized in that, this method also comprises:
BS under f, the MS discharges being connected between MS and the PDSN.
15, the method for claim 1 is characterized in that, when described MS was power control messages to affiliated BS transmission application layer messages, BS progressively improved the power of forward shared channel under the MS.
16, the method for claim 1 is characterized in that, this method also comprises:
BS does not receive the power control messages that arbitrary MS sends under the MS in setting-up time, then progressively reduce the power of forward shared channel, administer power signaling message that arbitrary MS sends up to receiving or the power of forward shared channel is dropped to 0 according to the time interval that sets in advance and power step size.
17, the method for claim 1 is characterized in that, MS subscribes to " Call Waiting " business that the mobile communication system network side provides, and in the process of the Program of BS broadcasting, also comprises the step of handling the calling incoming call under MS receives:
The calling incoming call is arranged during the Program of BS broadcasting under MS receives, BS stops to this MS broadcasting Program under the MS, changes that the calling incoming call is handled or prompting MS has the calling incoming call over to, whether stops to receive broadcasting Program by the MS decision, changes the calling incoming call over to and handles.
18, the method for claim 1 is characterized in that, will support the application layer software of BCMCS to be stored in the mobile communication system network side, and the process that described application layer at MS is provided with the function of supporting BCMCS is:
MS moves after downloading the application layer software of supporting BCMCS from the mobile communication system network side, is provided with to finish the function of supporting BCMCS.
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| CN101170737B (en) * | 2007-11-23 | 2010-08-04 | 中兴通讯股份有限公司 | Small traffic multicast data distribution method and system in broadcast and multicast service |
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| US7035657B2 (en) * | 2002-05-08 | 2006-04-25 | Qualcomm Inc. | Method and apparatus for supporting application-layer media multicasting |
| US7440425B2 (en) * | 2003-09-04 | 2008-10-21 | Samsung Electronics Co., Ltd. | Apparatus and method for reducing paging channel loading for broadcast multicast services in a wireless network |
| KR20050064630A (en) * | 2003-12-24 | 2005-06-29 | 한국전자통신연구원 | Dual stack ip mutlicast application gateway for multi-party conference |
| CN1674576B (en) * | 2004-06-03 | 2010-04-28 | 华为技术有限公司 | Method for transmitting strategic information inter-network equipment |
| CN1316783C (en) * | 2004-06-30 | 2007-05-16 | 中国科学院计算技术研究所 | Data restoring method for application layer group broadcast |
| CN100373889C (en) * | 2004-12-03 | 2008-03-05 | 北京大学 | Multicast transmission method for IP network |
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