CN100387071C - Method for realizing multimedia broadcast and multi cast service by air interface - Google Patents
Method for realizing multimedia broadcast and multi cast service by air interface Download PDFInfo
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- CN100387071C CN100387071C CNB2004100599724A CN200410059972A CN100387071C CN 100387071 C CN100387071 C CN 100387071C CN B2004100599724 A CNB2004100599724 A CN B2004100599724A CN 200410059972 A CN200410059972 A CN 200410059972A CN 100387071 C CN100387071 C CN 100387071C
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Abstract
The present invention discloses a method for realizing a multimedia broadcasting and multicasting service by an air interface, which comprises the following procedures: firstly, an air interface user face structure which comprises an RLC, an MAC and a PHY is arranged, and based on the air interface user face structure, the RNC firstly replicates through a multimedia service data relay the multimedia broadcasting data transmitted by an SGSN to all the RLC corresponding to every cell comprised by a multimedia broadcasting and multicasting service area when the RNC transmits the multimedia broadcasting data to UE; the RLC processes the multimedia broadcasting data and transmits the multimedia broadcasting data to the MAC through a CTCH, and the MAC processes the received multimedia broadcasting data and transmits the multimedia broadcasting data to a Node B which transmits the received multimedia broadcasting data through the air interface; the UE receives the multimedia broadcasting data transmitted by the Node B through the air interface. The present invention solves the problem at present that the multimedia broadcasting data can not be broadcast by the existing logical channel. The proposal provided by the present invention achieves the purpose that the multimedia broadcasting data is broadcast by the existing logical channel.
Description
Technical field
The present invention relates to multimedia broadcast multicast (MBMS) service technique field, relate to a kind of method that realizes multimedia broadcast multi-broadcasting business by air interface or rather.
Background technology
The broadcasting service of third generation mobile comprises cell broadcaste service (CBS) and MBMS.Along with Development of Multimedia Technology, comprise that on business tine the MBMS of information such as video, audio frequency, picture and literal is paid close attention to by the user more and more.
These two kinds of broadcasting services all require to use the service bearer of single-point to multiple spot between the grounding wireless access network (UTRAN) of universal mobile telecommunications system and the subscriber equipment (UE), and wherein, UTRAN comprises radio network controller (RNC) and base station (Node B).For present CBS, the application layer of CBS lays respectively at CBC (CBC) and UE, and the cell broadcaste service data need be transmitted by Iu-BC Interface and air interface (Uu).Specifically, referring to Fig. 1, RNC among CBC and the UTRAN carries out communication by service area broadcast protocol (SABP) message, be that cell broadcaste service data among the CBC send to RNC by SABP message from Iu-BC Interface, broadcast multi-broadcasting control (BMC) among the RNC obtains cell broadcaste service data and relevant information from the SABP message of receiving, these information are assembled into BMC message, and with certain cycle by CTCH Common Traffic Channel (CTCH) in this BMC message of Uu repeated broadcast.BMC has only once more when CBC receives SABP message, just stops the original BMC message of repeated broadcast, and the SABP message of newly receiving is handled.
In protocol stack shown in Figure 1, be not specifically designed to user's face of carrying cell broadcaste service data between CBC and the RNC, need BMC to pass through SABP message and transmit the cell broadcaste service data, the real-time of this message communication mechanism is relatively poor, only be fit to transmit short message, and be not suitable for transmitting the business of having relatively high expectations as real-times such as stream business.And SABP message maximum can only be carried the cell broadcaste service data that length is 1230 bytes, is not suitable for transmitting the very big multimedia service of amount of information.In addition, comprised the BMC entity that is used to assemble and broadcast BMC message in the user's face of the eating dishes without rice or wine structure of cell broadcaste service, because the limited length of BMC message, and can introduce suitable time delay such as mechanism such as storage, repeating transmission among the BMC, can not satisfy the requirement of high real-time business, therefore, the CBS user's face structure that comprises the BMC entity can not satisfy the speed of the multimedia broadcast multi-broadcasting business that flows service feature and the requirement of real-time.Thus, user's face structure and the protocol stack at CBS is not suitable for the Multimedia Message that broadcast video, audio frequency etc. flow service features.
For realizing multimedia broadcasting, industry has proposed to be used to send the multi-media broadcast broadcasting user face structure of Multimedia Message at present, this structure as shown in Figure 2, the application layer of multimedia broadcast multi-broadcasting business is distributed in respectively among BroadCast MultiCast Service center (BM-SC) and the UE, gateway general packet radio service (GPRS) support node (GGSN), serving GPRS support node (SGSN) and UTRAN etc. are between BM-SC and UE, and these entities are finished the transparent forwarding of multimedia broadcast multi-cast service data.Wherein, multimedia broadcast multi-broadcasting business user's face structure of eating dishes without rice or wine is determined by MTCH protocol architecture shown in Figure 3.
The MBMS agreement is that multimedia broadcast multi-broadcasting business has defined two logic channels specially: MBMS control channel (MCCH) and MBMS Traffic Channel (MTCH), wherein, MCCH is used to carry the configuration information of MTCH and the control information relevant with business, and MTCH then is used to carry broadcast service data.The configuration information of MCCH is carried by Broadcast Control Channel (BCCH).The protocol architecture of MTCH specifically comprises sublayers such as packet data control agreement (PDCP), RLC, MAC and PHY, and this protocol architecture is referring to Fig. 3.
PDCP among Fig. 3 is mainly used in a compression/de-compression function of finishing the MBMS business, in the UTRAN side, and the professional corresponding PDCP of the MBMS of each MBMS cell set; In the UE side, the professional corresponding PDCP entity of each MBMS.The PDCP protocol Data Unit that the PDCP of UTRAN side also will obtain processing copies to the RLC entity of all sub-districts in this cell set.For RLC, in the UTRAN side, the professional corresponding RLC entity of each MBMS of each sub-district; In the UE side, the also corresponding RLC entity of each MBMS business.For MAC, in the UTRAN side, the corresponding MAC entity in each sub-district; In the UE side, the then corresponding MAC entity of each UE.
Based on MTCH protocol architecture shown in Figure 3, when eating dishes without rice or wine the broadcast multimedia broadcast data, when also to be UTRAN by eating dishes without rice or wine be broadcast to UE with the multimedia broadcast data that BM-SC sends through GGSN, SGSN successively, the multimedia broadcast data that multi-medium data relaying wherein at first sends SGSN is transmitted to the PDCP of self, PDCP carries out the head compression to the data of receiving to be handled, and the data after will handling copy to the RLC entity of all sub-districts in the cell set.Entity such as RLC and MAC sends to the physical layer (PHY) that is positioned at Node B with these data after these data are handled, these data are sent by this PHY by Node B.UE is when receiving data, at first receive the data of Node B by eating dishes without rice or wine to send out by the PHY among the UE, and consign to upper-layer protocol entity handles such as MAC, RLC, PDCP successively, corresponding with the head compression processing that PDCP among the RNC carries out, the PDCP among the UE need carry out decompression to the data of receiving.
As mentioned above, the effect that PDCP is set in the MTCH protocol architecture is compressed the IP head of PDCP packet exactly, to reduce the length of PDCP bag.Though can save some transfer resources like this, increase the complexity and the processing delay of data processing.And this scheme needs the UE side also to support PDCP, so that the packet of receiving is decompressed, so just increased the implementation complexity of UE side.
In addition, because the MAC c/sh of MAC protocol definition does not support MTCH, therefore need on the basis of original MAC c/sh, increase the MAC-m that supports MTCH.Like this, the protocol architecture of MTCH has just comprised PDCP and MAC-m simultaneously, and this protocol architecture is all different with existing all logic channel structures, therefore can't use existing logic channel to realize the function of MTCH, must introduce PDCP and MAC-m simultaneously in existing logic channel structure.In addition, the configuration information of MTCH need be configured by MCCH, therefore also need introduce MCCH in existing Uu structure, also in BCCH, increase the configuration information of MCCH simultaneously, could realize multimedia broadcast multi-broadcasting business, like this, will do bigger change existing Uu structure.
That is to say, the MTCH of MBMS protocol definition and MCCH can't realize based on existing air interface structure, and present stage MBMS agreement prematurity still, more incomplete, the difficulty that realizes multimedia broadcast multi-broadcasting business according to present MBMS agreement is bigger, need do more change to existing structure.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method by air interface realization multimedia broadcast multi-broadcasting business, to realize multimedia broadcasting by existing logic channel.
For reaching above purpose, technical scheme of the present invention is achieved in that a kind of method that realizes multimedia broadcast multi-broadcasting business by air interface, multimedia broadcast data among the BM-SC of BroadCast MultiCast Service center is successively by gateway general packet wireless service support node GGSN, professional general packet wireless service support node SGSN and radio network controller (RNC) are handled, and sending to user equipment (UE) by air interface by RNC, this method comprises: be provided with and comprise Radio Link control RLC, air interface user's face structure of media interviews control MAC and physical layer PHY;
Based on this air interface user face structure, described RNC sends to UE by air interface with multimedia broadcast data and may further comprise the steps:
The multimedia broadcast data that a.RNC sends SGSN by the multimedia service data relaying copies to pairing all RLC in each sub-district that the multimedia broadcast multi-broadcasting business district comprises;
B.RLC handles the multimedia broadcast data of receiving, and the multimedia broadcast data after will handling by CTCH sends to MAC, MAC handles the multimedia broadcast data of receiving, and the multimedia broadcast data after will handling sends to base station node B, and Node B sends the multimedia broadcast data of receiving by air interface;
C.UE receives the multimedia broadcast data that Node B sends by air interface.
Described setting comprises that air interface user's face structure of RLC, MAC and PHY is: aloft the UE side of interface user plane structure is provided with RLC, MAC and PHY, in the RNC side RLC and MAC is set, and in Node B side PHY is set.
Among the described step b, the multimedia broadcast data after described MAC will handle sends to Node B and is: the multimedia broadcast data after MAC will handle sends to the PHY that is positioned at Node B;
Among the step c, the broadcast data that described UE reception Node B sends is: UE receives the broadcast data that Node B sends by the PHY of self.
Further comprise after the described step c: UE handles the multimedia broadcast data of receiving by self MAC and RLC successively.
This method may further include: the interface between GGSN and the SGSN is set to the carrying of general packet radio service tunnel agreement GTP tunnel.
This method can further include: the interface between SGSN and the RNC is set to the GTP tunnel carrying.
The present invention program is by providing based on the multimedia broadcasting of CTCH user's face structure of eating dishes without rice or wine, make when realizing multimedia broadcast multi-broadcasting business, do not need to define new logic channel, reduced in existing RNC-UE system and realized the difficulty of multimedia broadcast multi-broadcasting business, and reduced to realize the change of multimedia broadcast multi-broadcasting business existing RNC-UE system configuration.
In addition, the multimedia broadcast multi-broadcasting business provided by the invention BMC entity in the user's face of the eating dishes without rice or wine structure of existing cell broadcaste service of eating dishes without rice or wine in user's face structure, therefore can not be subjected to the restriction of BMC message-length and BMC scheduling feature, thereby can not influence the speed and the real-time of the multimedia broadcast multi-broadcasting business of stream service feature.
The present invention does not increase PDCP and can realize duplicating of broadcast data yet by the multimedia service data relaying that multimedia broadcast data is copied to each pairing all RLC in sub-district that the multimedia broadcast multi-broadcasting business district comprises being set, making.
Description of drawings
Fig. 1 is the schematic diagram of existing cell broadcaste service protocol stack;
Fig. 2 is the multi-media broadcast broadcasting user face structural representation of existing MBMS agreement regulation;
Fig. 3 is the multimedia broadcasting of the existing MBMS agreement regulation user plane protocol structural representation of eating dishes without rice or wine;
Fig. 4 is the multimedia broadcasting provided by the invention user plane protocol structural representation of eating dishes without rice or wine;
Fig. 5 is a multi-media broadcast broadcasting user face structural representation provided by the invention;
Fig. 6 is the flow chart of transmission and receiving multimedia broadcast data among the present invention.
Embodiment
The present invention program sets in advance one based on CTCH and do not comprise the user's face of the eating dishes without rice or wine structure of PDCP, and this user's face structure of eating dishes without rice or wine is arranged in the multi-media broadcast broadcasting user face structure.
The set user's face of eating dishes without rice or wine structure is referring to Fig. 4, and for ease of the processing to data, this structure only comprises RLC, MAC and three protocol entities of PHY in the UE side, only comprises RLC and two protocol entities of MAC in the RNC side, and Node B side still has only PHY.No matter be the UE side, or the RNC side does not all comprise PDCP, and the function of PDCP copy data is realized by the multimedia service data relaying among the RNC.That is to say, need not eat dishes without rice or wine to increase PDCP in user's face structure, but the pairing RLC in each sub-district that needs the multimedia service data relaying among the RNC that the multimedia service data transparent replication is comprised to the multimedia broadcast multi-broadcasting business district.
Because the defined MAC c/sh of existing MAC agreement supports CTCH, and CTCH satisfies the requirement that the broadcasting service single-point sends to multiple spot, therefore need not as the MTCH protocol architecture, define new MAC-m, can directly by CTCH broadcast data be sent to MAC by RLC.And the configuration information of CTCH is by the BCCH carrying, therefore need not define new logical control channel as the MTCH protocol architecture.
Based on the user's face of the eating dishes without rice or wine structure of above-mentioned setting, user's face structure of multimedia broadcasting comprises RLC, MAC and PHY referring to Fig. 5 among the UE, comprise RLC and MAC among the RNC of UTRAN, then comprises PHY among the Node B of UTRAN.
Based on the multimedia broadcast data transfer process of user's face structure shown in Figure 5 as shown in Figure 6, corresponding following steps:
By above-mentioned transmission and receiving course, can finish the broadcasting process that multimedia broadcast data is being eated dishes without rice or wine.
For guaranteeing the load bearing requirements of high velocity stream business, can also the interface of the entity between BM-SC and UE be provided with, such as, Iu interface between gn interface between GGSN and the SGSN and SGSN and the RNC all is set to the carrying of GPRS Tunnel Protocol (GTP) tunnel, to satisfy the load bearing requirements of high velocity stream business.
The above only is the present invention program's preferred embodiment, not in order to limit protection scope of the present invention.
Claims (6)
1. method that realizes multimedia broadcast multi-broadcasting business by air interface, multimedia broadcast data among the BM-SC of BroadCast MultiCast Service center is handled by gateway general packet wireless service support node GGSN, professional general packet wireless service support node SGSN and radio network controller (RNC) successively, and send to user equipment (UE) by air interface by RNC, it is characterized in that this method comprises: the air interface user's face structure that comprises Radio Link control RLC, media interviews control MAC and physical layer PHY is set;
Based on this air interface user face structure, described RNC sends to UE by air interface with multimedia broadcast data and may further comprise the steps:
The multimedia broadcast data that a.RNC sends SGSN by the multimedia service data relaying copies to pairing all RLC in each sub-district that the multimedia broadcast multi-broadcasting business district comprises;
B.RLC handles the multimedia broadcast data of receiving, and the multimedia broadcast data after will handling by CTCH Common Traffic Channel CTCH sends to MAC, MAC handles the multimedia broadcast data of receiving, and the multimedia broadcast data after will handling sends to base station node B, and Node B sends the multimedia broadcast data of receiving by air interface;
C.UE receives the multimedia broadcast data that Node B sends by air interface.
2. method according to claim 1, it is characterized in that, described setting comprises that air interface user's face structure of RLC, MAC and PHY is: aloft the UE side of interface user plane structure is provided with RLC, MAC and PHY, in the RNC side RLC and MAC is set, and in Node B side PHY is set.
3. method according to claim 2 is characterized in that among the described step b, and the multimedia broadcast data after described MAC will handle sends to Node B and is: the multimedia broadcast data after MAC will handle sends to the PHY that is positioned at Node B;
Among the step c, the broadcast data that described UE reception Node B sends is: UE receives the broadcast data that Node B sends by the PHY of self.
4. according to claim 2 or 3 described methods, it is characterized in that further comprise after the described step c: UE handles the multimedia broadcast data of receiving by self MAC and RLC successively.
5. method according to claim 1 is characterized in that, this method further comprises: the interface between GGSN and the SGSN is set to the carrying of general packet radio service tunnel agreement GTP tunnel.
6. method according to claim 1 is characterized in that, this method further comprises: the interface between SGSN and the RNC is set to the GTP tunnel carrying.
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| CNB2004100599724A CN100387071C (en) | 2004-06-30 | 2004-06-30 | Method for realizing multimedia broadcast and multi cast service by air interface |
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| CN100387071C true CN100387071C (en) | 2008-05-07 |
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| CN101166145B (en) * | 2006-10-18 | 2011-09-14 | 华为技术有限公司 | Downlink transmission method and system for multicast broadcast service |
| CN101309160B (en) * | 2006-10-18 | 2011-03-30 | 华为技术有限公司 | Multicast broadcast service receiving and transmitting method, base station, gateway and terminal |
| CN101247167B (en) * | 2007-02-14 | 2013-10-09 | 华为技术有限公司 | Service transmission method, system and equipment in multi-user surface path network |
| CN101562602B (en) * | 2008-04-18 | 2012-09-05 | 中兴通讯股份有限公司 | Method for indicating data format type in MBMS service data synchronization system |
| US9226300B2 (en) * | 2008-07-11 | 2015-12-29 | Qualcomm Incorporated | Hierarchical control channel structure for wireless communication |
| CN102045148B (en) * | 2009-10-16 | 2013-04-10 | ***通信集团公司 | Data transmission method and device based on relay mobile communication system |
| CN102098725B (en) * | 2009-12-15 | 2015-07-22 | 中兴通讯股份有限公司 | System and method for transmitting data between service gateway and relay terminals |
| GB2491335A (en) * | 2011-03-24 | 2012-12-05 | Wireless Tech Solutions Llc | A relay node receives broadcast data on a first channel and retransmits the broadcast data on a second channel |
| US20170055235A1 (en) * | 2015-08-21 | 2017-02-23 | Qualcomm Incorporated | Providing precision timing protocol (ptp) timing and clock synchronization for wireless multimedia devices |
| CN110622606A (en) * | 2017-06-16 | 2019-12-27 | Oppo广东移动通信有限公司 | Method for transmitting data, terminal equipment and network equipment |
| WO2022000180A1 (en) * | 2020-06-29 | 2022-01-06 | Mediatek Singapore Pte. Ltd. | Methods and apparatus of reliable multicast transmission with uplink feedback |
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