CN101335906B - Multi-service information sending method, multi-service implementing method and communication device - Google Patents
Multi-service information sending method, multi-service implementing method and communication device Download PDFInfo
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- CN101335906B CN101335906B CN200710076232.5A CN200710076232A CN101335906B CN 101335906 B CN101335906 B CN 101335906B CN 200710076232 A CN200710076232 A CN 200710076232A CN 101335906 B CN101335906 B CN 101335906B
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- H04W72/30—Resource management for broadcast services
Abstract
The present invention relates to the field of multicast communication system, specifically discloses a multicast service implementing method, including: coding to service information to be transmitted, to obtain a first information code stream and a second information code stream; the base station transmitting the first information code stream, and the relaying station receiving the first information code stream transmitted by the base station; the base station transmitting the information code stream, and simultaneously the relaying station transmitting the first information code stream; theterminal acquiring the first information code stream to realize multicast service. The invention also discloses a multicast service message routing method, base stations, relay stations and terminals. The method provided by the inventive embodiment can avoid the waste of wireless resource caused by that the base station repeatedly convey the same content, so that the relay system and the multicast service are better combined.
Description
Technical field
The present invention relates to the communications field, particularly the transmission technology of multicast service.
Background technology
Along with development of Communication Technique, a large amount of multimedia services continue to bring out out, and these multimedia services data volume when transmission is big, longer duration, delay sensitive.In order to effectively utilize mobile network resource, each standardization body has all proposed the concept of broadcasting and multicast service, as: at third generation partnership project (3rd Generation Partnership Project, 3GPP) MBMS that proposes in the tissue (Multimedia Broadcast and Multicast Service, MBMS); Third generation partnership project two (3rd Generation Partnership Project, 3GPP2) broadcasting that proposes in the tissue and multicast service (Broadcast and Multicast Service, BCMCS); The BroadCast MultiCast Service that in IEEE 802.16e tissue, proposes (Multi-Broadcast Service, MBS) etc.Such multicast service refers to that all a data source arrives many electric industries affairs to the point that a plurality of users send data, realizes that Internet resources are shared, comprises that mobile core network and access network resource are shared, especially air interface resource.These multicast services not only will be realized classes of messages multicast and the broadcasting of plain text low rate, and will realize multimedia service multicast and the broadcasting of two-forty.In general, one road high-speed multimedia service needed is encoded to a code stream, and so-called code stream is exactly in order to adapt to the digital communication system transmission, the binary data stream that forms after the information via specific codings such as video, audio frequency.
In the prior art, with reference to Fig. 1, the implementation method of multicast service is: at first, system will treat that sending service information carries out multiple bit rate encoding, obtain to be used for realizing the essential information code stream of multicast service, and at least one is for the enhancing information code current that improves this quality of service, and described essential information code stream is realized basic multicast service, and described enhancing information code current can not be realized multicast service separately.Then, system issues the essential information code stream by the low-rate physical channel, makes the essential information code stream cover whole residential quarter; System issues the physical channel of described enhancing information code current by higher rate, make channel condition preferably the user can receive the enhancing information code current.At last, the user obtains the essential information code stream, realizes described multicast service, and described essential information code stream is made of an information code current usually; The user obtains the enhancing information code current, and optimizes the multicast service of residential quarter on the basis of described essential information code stream by strengthening information code current, can realize more excellent multicast service.Strengthen information code current and generally include at least one information code current, and the physical channel that same information code current has the phase same rate issues.
Because in wireless communication system, in order to solve the covering problem of base station, usually need to adopt relay station that the wireless communication signal between base station and the terminal use is strengthened, yet, for realize also ripe method without comparison of multicast by relay station, therefore, also can multicast service in order to make relay station, the transmission of information need be divided into two stages:
Phase I: the base station by and relay station between the delivery of content that in downlink data frame, in advance relay station need be broadcasted of Radio Link give relay station, in its downlink data buffer memory, transfer mode can be broadcasting or dedicated channel to relay station with this content caching;
Second stage, the phase mutual interference in the multicast service between different base station and the relaying, identical content need be broadcasted simultaneously with relay station in the base station on identical time, so that its user under covering can both normally receive multicast service.
The inventor finds in realizing process of the present invention, in the implementation method of multicast service in the prior art, and reckon without relaying technique, therefore, make multicast service in the application of the system that has relay station certain difficulty be arranged, can not take full advantage of the characteristic that the relay station expansion covers simultaneously.
Summary of the invention
The technical problem that the embodiment of the invention solves provides a kind of sending method of multi-service information, implementation method, base station, relay station and the terminal of multicast service, realizes that multicast service and relay system are better in conjunction with using.
In order to realize the above object, the method that the embodiment of the invention provides a kind of multi-service information to send comprises:
To treat that sending service information encodes, obtain first information code stream and second information code current;
The base station sends described first information code stream, and relay station receives the first information code stream that described base station sends;
Described base station sends described second information code current, and described relay station sends the first information code stream of described reception simultaneously.
In order to realize the above object, the embodiment of the invention provides a kind of multicast service implementation method, comprising:
Treat sending service information and encode, obtain first information code stream and second information code current;
The base station sends described first information code stream, and relay station receives the first information code stream that described base station sends;
Described base station sends described second information code current, and described relay station sends the first information code stream of described reception;
Terminal is obtained first information code stream and is realized multicast service.
In order to realize the above object, the embodiment of the invention provides a kind of base station, comprising: coding unit and transmitting element;
Described coding unit is used for encoding to sent business information, obtains first information code stream and second information code current;
Described transmitting element be used for to send described first information code stream that described coding unit coding obtains to relay station and/or terminal; Send described second information code current that described coding unit coding obtains to terminal.
In order to realize the above object, the embodiment of the invention provides a kind of relay station, comprising:
Receiving element is used for receiving the first information code stream that the base station sends;
Transmitting element is used for sending the first information code stream that described receiving element receives when described base station sends second information code current.
In order to realize the above object, the embodiment of the invention provides a kind of terminal, comprising:
Receiving element is used for receiving first information code stream and second information code current;
Processing unit, the first information code stream that is used for receiving according to described receiving element is realized multicast service;
Optimize the unit, be used for optimizing described multicast service according to second information code current that described receiving element receives.
By the technical scheme that the embodiment of the invention provides, will treat that sending service information encodes, obtain first information code stream and second information code current; The base station sends described first information code stream, and relay station receives the first information code stream that described base station sends; Described base station sends described second information code current, and described relay station sends the first information code stream of described reception, and terminal receives first information code stream and second information code current respectively, and the realization multicast service also is optimized.The base station is sent two secondary data to be changed into and once broadcasts first information code stream and second information code current, and relay station is after receiving first information code stream, broadcasting first information code stream in base station broadcast second information code current, thereby avoid the base station that same content is repeated to transmit twice and Radio Resource is caused waste, make relay system and MBMS business obtain combination better.
Description of drawings
Fig. 1 issues principle schematic for multicast service in the prior art;
Fig. 2 is the schematic flow sheet of multicast service implementation method in the first embodiment of the invention;
Fig. 3 is a kind of frame structure schematic diagram in the embodiment of the invention;
Fig. 4 is the structural representation of base station in the third embodiment of the invention;
Fig. 5 is the structural representation of relay station in the four embodiment of the invention;
Fig. 6 is the structural representation of terminal in the fifth embodiment of the invention.
Embodiment
In order to make concrete technical scheme of the present invention, goal of the invention clearer, be described further below in conjunction with concrete execution mode and accompanying drawing.
With reference to Fig. 2, introduce first embodiment of the invention, about a kind of implementation method of multicast service.Among this embodiment, comprising:
Step 201: multi-service information to be sent is encoded, be divided into the essential information code stream and strengthen information code current.
Multi-service information to be sent is carried out the increment multi-rate coding in application layer, the coding back strengthens information code current by this information code current of roadbed and one to multiple road and forms, the essential information code stream is used for realizing multicast service, strengthen information code current and be used for optimizing multicast service, and can realize multicast service separately.
For example, when multi-service information to be sent is vision signal, when carrying out the increment multi-rate coding, can be to the half-tone information coding of vision signal, acquisition can realize the essential information code stream of black and white image; To the chrominance information coding, acquisition can further realize the enhancing information code current of coloured image; And gradable comprising for improving grey level or improving the different enhancing information code current of image resolution ratio also in the described enhancing information code current.
Step 202: the base station sends the essential information code stream, and relay station receives the essential information code stream.
At first, in the phase I, the base station sends the essential information code stream, and at this moment, all terminal uses in this base station range and relay station receive the essential information code stream that this base station sends together.The terminal use stores data in its oneself the data field, and relay station then is stored in the essential information code stream that receives it and transmits in data area.
Step 203: the base station sends and strengthens information code current, and relay station sends the essential information code stream.
After the base station sends the essential information code stream, certain interval of time, in second stage, the base station sends the enhancing information code current again.The transmitting-receiving change-over time of relay station can not be shorter than blanking time, otherwise the transmitting-receiving conversion of relay station can not be satisfied; Can not be longer than MBMS traffic handling time and terminal use this blanking time to the merging time of essential information code stream and enhancing information code current, otherwise the MBMS business then can be affected, and the terminal use can not merge essential information code stream and the enhancing information code current that receives simultaneously.
When the base station sends the enhancing information code current, before sending, relay station receives and is stored in the essential information code stream of transmitting in the data area.
Step 204: terminal receives the essential information code stream and strengthens information code current.
In the scope that the base station covers, receive that in the phase I terminal use of basic information code current information receives the enhancing information code current that the base station sends, and is optimized the multicast service of having realized; Fail effectively to receive the user of essential information code stream information in the phase I, if can receive the essential information code stream that relay station sends this moment, can receive the essential information code stream this moment simultaneously and strengthen information code current, can realize that then basic multicast service also can be optimized.
Outside the scope that the base station covers, the terminal use does not receive essential information code stream and the enhancing information code current that the base station sends, but if this terminal use in the coverage of relay station, then can receive relay station at the essential information code stream that second stage sends, realize basic multicast service.
In an embodiment of the present invention, in second stage, the base station sends and strengthens information code current, relay station sends the essential information code stream and can adopt frequency division, time-division, sign indicating number to divide, and the sky diversity mode that grades, no matter which kind of mode of employing sends, as long as user terminal can receive and tell the essential information code stream and strengthen information code current.
For example, with reference to Fig. 3, Figure 3 shows that a kind of frame structure schematic diagram in the embodiment of the invention, in the present embodiment, base station and relay station adopt the mode of frequency division to send resource.Among Fig. 3, X direction is time domain, is unit with the frame; Y direction is frequency domain, total 5M bandwidth, and this running time-frequency resource can be used simultaneously by base station and relay station.Every frame is divided into two stages, has certain time interval between phase I and second stage.In the phase I, the base station sends essential information code stream PP (Packet Primary), and relay station receives the essential information code stream that the base station sends; Send enhancing information code current PE (PacketEnhanced) in the second stage base station, relay station sends the essential information code stream, PP and PE data volume ratio are to be 2:1 in the present embodiment, relay station is received the essential information code stream that the base station sends in the phase I of every frame, second stage at every frame adopts the bandwidth of half to broadcast the essential information code stream that receives, at this moment, relay station coding or the modulation system that need adopt is the twice that adopt the base station.As: on coded system, the 1/3Turbo sign indicating number is adopted in the base station, and relay station then need adopt the 2/3Turbo sign indicating number; Perhaps on modulation system, the 4QAM modulation system is adopted in the base station, and relay station then need adopt the 64QAM modulation system.Practical situations according to network, and the user is for the difference of multimedia broadcast multi-broadcasting business quality expected degree, can change the essential information code stream and strengthen the data volume ratio of information code current, and adjustment and coded system reach the optimum efficiency that multicast service is used.
Pass through the specific embodiment of the present invention, multi-service information is resolved into different code streams, the multicast service of multimass grade is provided according to terminal use's different channels condition, for the terminal use of bad channel conditions provides basic service, and provide higher-quality business for the good terminal use of channel condition.Simultaneously, multicast service is combined with the application of relay system, base station in the relay system is sent two secondary data to be changed into and once sends the essential information code stream and strengthen information code current, relay station sends the essential information code stream when the base station send to strengthen information code current after receiving the essential information code stream, thereby avoid the base station that same content is repeated to transmit twice and Radio Resource is caused waste.In addition, in relay system, utilize the performance of relay station, enlarged the coverage of multicast service.And, less to the modification of existing multicast service according to the method that the specific embodiment of the invention provides, can further facilitate the application of MBMS in relay system.
Introduce second embodiment of the invention below, about a kind of implementation method of multicast service.In this method in step and the first embodiment of the invention step basic identical, its difference is that in the phase I, the base station at first sends the enhancing information code current, relay station receives the enhancing information code current that the base station sends; In second stage, the base station sends the essential information code stream, and relay station sends and strengthens information code current.
The terminal use receives the essential information code stream and strengthens information code current.Can not realize multicast service owing to receive only the terminal use who strengthens information code current, therefore, in the method that this embodiment provides, the terminal use that can only receive the signal of relay station transmission can not realize multicast service, but as long as the terminal use can receive the essential information code stream that other base stations send, then can realize multicast service.Therefore, the method that this embodiment provides belongs to protection range of the presently claimed invention equally as one of the specific embodiment of the present invention.
Below with reference to Fig. 4, introduce the present invention's the 3rd embodiment, about a kind of base station.This base station comprises coding unit 401, transmitting element 402.
Coding unit 401 is used for encoding to sent multi-service information, obtains first information code stream and second information code current.
The mode of coding can change for the degree of multicast service quality desired value according to the terminal use.The first information code stream of coding gained and second information code current can or strengthen information code current for the essential information code stream, the essential information code stream is used for realizing basic multicast service, strengthen information code current and be used for optimizing the basic multicast service of realizing, and can not realize multicast service separately.Behind multi-service information coding to be sent, can form this information code current of roadbed and at least one road and strengthen information code current.
Transmitting element 402 is used for first information code stream and second information code current of coding unit 401 coding gained are sent respectively.First information code stream is sent to relay station and/or terminal, and terminal is stored in it in data area after receiving this first information code stream; After relay station receives this first information code stream, it is stored in waits to transmit in the data area; Send second information code current, after sending first information code stream certain interval of time, send second information code current, can not be shorter than the transmitting-receiving change-over time of relay station this blanking time, otherwise can not satisfy the transmitting-receiving conversion of relay station; Can not be longer than MBMS traffic handling time and terminal use this blanking time to the merging time of essential information code stream and enhancing information code current, otherwise the MBMS business then can be affected, and the terminal use can not merge essential information code stream and the enhancing information code current that receives simultaneously.
The base station that provides in the present embodiment, by multi-service information coding to be sent is divided into two category information code streams, and send successively respectively, avoided in relay system, same content being transmitted twice and Radio Resource being caused waste, made relay system and MBMS business obtain better in conjunction with using.
Introduce the present invention's the 4th embodiment below, about a kind of relay station 500, with reference to Fig. 5, this relay station 500 comprises receiving element 501 and transmitting element 502.
Receiving element 501 is used for receiving the first information code stream that the base station sends;
Transmitting element 502 is used for when described base station sends second information code current, sends the first information code stream that receiving element 501 receives.
In the relay station of this embodiment, at first receive the first information code stream that the base station sends, when sending second information code current, the base station sends the first information code stream that this receives then, guaranteed in this base station range, the first information code stream but the terminal use who does not receive first information code stream still can have an opportunity to receive, and can make the terminal use outside this base station range can receive first information code stream, thereby realization multicast service, therefore, utilize this relay station can enlarge the coverage of multicast service, can make multicast service obtain the application of wider scope.
Introduce the present invention's the 5th embodiment below, about a kind of terminal, with reference to Fig. 6, this terminal comprises receiving element 601, processing unit 602 and optimizes unit 603.
Receiving element 601 is used for receiving first information code stream and second information code current;
In the time of within terminal 600 is in the scope that the base station covers, receiving element 601 receives the first information code stream that the base station sends earlier, it is stored in the data area, and then receives second information code current that the base station sends; When terminal 600 is within the base station range, but when sending first information code stream in the base station, receiving element 601 does not receive this first information code stream, then can receive the first information code stream that relay station sends when the reception base station sends second information code current; In the time of outside terminal 600 is in the scope that the base station covers, if within the coverage of relay station, then receiving element 601 can receive this first information code stream when relay station sends first information code stream.
By each embodiment of above the present invention, multi-service information is resolved into different code streams, the multicast service of multimass grade is provided according to terminal use's different channels condition, for the terminal use of bad channel conditions provides basic service, and provide higher-quality business for the good terminal use of channel condition.Simultaneously, multicast service is combined with the application of relay system, base station in the relay system is sent two secondary data to be changed into and once sends the essential information code stream and strengthen information code current, relay station sends the essential information code stream when the base station send to strengthen information code current after receiving the essential information code stream, thereby avoid the base station that same content is repeated to transmit twice and Radio Resource is caused waste.In addition, in relay system, utilize the performance of relay station, enlarged the coverage of multicast service.And, less to the modification of existing multicast service according to the method that the specific embodiment of the invention provides, can further facilitate the application of MBMS in relay system.
Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (6)
1. a multi-service information sending method is characterized in that, comprising:
To wait to send out multi-service information and carry out the increment multi-rate coding, obtain first information code stream and second information code current, described first information code stream is this information code current of roadbed, described second information code current is that one to multiple road strengthens information code current, described essential information code stream is used for realizing multicast service, and described enhancing information code current is used for optimizing multicast service;
The base station sends described first information code stream, and relay station receives the first information code stream that described base station sends;
Described base station sends described second information code current, and described relay station sends the first information code stream of described reception simultaneously;
Described base station sends life period interval between described first information code stream and described second information code current, the time span in the described time interval is not less than the transmitting-receiving change-over time of described relay station, the time span in the described time interval is no longer than the MBMS MBMS processing time, also no longer than the merging time of terminal use to described first information code stream and second information code current.
2. multi-service information sending method according to claim 1, it is characterized in that, described base station and described relay station adopt time-division or frequency division or sign indicating number branch or empty one or more modes in the diversity mode of dividing to transmit when sending described first information code stream and/or second information code current.
3. a multicast service implementation method is characterized in that, comprising:
Treat sending service information and carry out the increment multi-rate coding, obtain first information code stream and second information code current; Described first information code stream is this information code current of roadbed, and described second information code current is that one to multiple road strengthens information code current, and described essential information code stream is used for realizing multicast service, and described enhancing information code current is used for optimizing multicast service;
The base station sends described first information code stream, and relay station receives the first information code stream that described base station sends;
Described base station sends described second information code current, and described relay station sends the first information code stream of described reception; Described base station sends life period interval between described first information code stream and described second information code current, the time span in the described time interval is not less than the transmitting-receiving change-over time of described relay station, the time span in the described time interval is no longer than the MBMS MBMS processing time, also no longer than the merging time of terminal use to described first information code stream and second information code current;
Terminal is obtained first information code stream and is realized multicast service.
4. multicast service implementation method according to claim 3 is characterized in that, described terminal is obtained first information code stream and realized that multicast service comprises:
When described terminal receives the first information code stream of described base station transmission, realize multicast service;
When described terminal does not receive the first information code stream of described base station transmission, receive the first information code stream that described relay station sends, realize multicast service.
5. multicast service implementation method according to claim 4 is characterized in that, described method also comprises, when described terminal receives the first information code stream that described base station sends, after realizing multicast service, also receive second information code current that described base station sends, optimize multicast service.
6. multicast service implementation method according to claim 3, it is characterized in that, described base station and described relay station adopt time-division or frequency division or sign indicating number branch or empty one or more modes in the diversity mode of dividing to transmit when sending described first information code stream and/or second information code current.
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| CN200710076232.5A CN101335906B (en) | 2007-06-27 | 2007-06-27 | Multi-service information sending method, multi-service implementing method and communication device |
| PCT/CN2008/071443 WO2009000208A1 (en) | 2007-06-27 | 2008-06-26 | Multicast service information transmission method, multicast service implement method, base station, relay station, and terminal |
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| CN200710076232.5A CN101335906B (en) | 2007-06-27 | 2007-06-27 | Multi-service information sending method, multi-service implementing method and communication device |
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| CN101478372B (en) * | 2009-01-16 | 2011-09-14 | 清华大学 | Cooperative wireless multipath method based on network encoding |
| CN102668659B (en) * | 2010-01-13 | 2015-04-15 | 上海贝尔股份有限公司 | Method and equipment for inter-cell interference coordination in relay-assisted cellular system |
| CN102763450B (en) * | 2010-02-11 | 2016-05-11 | 上海贝尔股份有限公司 | Transmission method and the equipment of the graduated encoding stream in junction network |
| WO2020097835A1 (en) * | 2018-11-14 | 2020-05-22 | 华为技术有限公司 | Multimedia service transmission method and device |
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| CN1571512A (en) * | 2004-04-30 | 2005-01-26 | 清华大学 | Mobile terminal oriented multimedia broadcasting system and implementing method thereof |
| CN1848770A (en) * | 2005-04-14 | 2006-10-18 | 阿尔卡特公司 | Method and system for managing access to multicast groups |
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| JP2005217677A (en) * | 2004-01-29 | 2005-08-11 | Japan Radio Co Ltd | Relay node in cellular ip network, and routing information creating method for downloading multicast data |
| CN1866782A (en) * | 2005-05-18 | 2006-11-22 | 华为技术有限公司 | Method for realizing system broadcast multicast service |
| US20070133455A1 (en) * | 2005-12-13 | 2007-06-14 | Ravi Kuchibhotla | System and method for multicasting through short range mobile-to-mobile communication |
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| CN1571512A (en) * | 2004-04-30 | 2005-01-26 | 清华大学 | Mobile terminal oriented multimedia broadcasting system and implementing method thereof |
| CN1848770A (en) * | 2005-04-14 | 2006-10-18 | 阿尔卡特公司 | Method and system for managing access to multicast groups |
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