CN101123744B - A multicast device and method for multimedia broadcast and multicast service - Google Patents
A multicast device and method for multimedia broadcast and multicast service Download PDFInfo
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- CN101123744B CN101123744B CN200610089256XA CN200610089256A CN101123744B CN 101123744 B CN101123744 B CN 101123744B CN 200610089256X A CN200610089256X A CN 200610089256XA CN 200610089256 A CN200610089256 A CN 200610089256A CN 101123744 B CN101123744 B CN 101123744B
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Abstract
The invention discloses a multicast method for multimedia broadcasting multicast service which is used for transmission of data frame from point to the multipoint in mobile network and comprises the following steps: a data block is arranged in the frame to store data for transmission; area number mark is arranged in the frame to represent the total number of areas which need to be transmitted by the data block; an area identification mark for marking the area is arranged in the frame to bear the mark of auxiliary public physical control signal of the multimedia broadcasting multicast service and to bear the mark of a forward access channel of the multimedia broadcasting multicast service; the invention sends the data block to the area.
Description
Technical field
The present invention relates to a kind of wireless communication field, relate in particular to a kind of multicast device and method that is used for the multimedia broadcast multicast service.
Background technology
Along with development communication technologies, the mobile data speed that can provide is more and more higher, the application form of mobile service is also more and more diversified, except business such as satisfy that phone, message and surfing Internet with cell phone are browsed, also emerged a large amount of high bandwidth multimedia services, as video conference, television broadcasting, video request program, advertisement, online education, interactive game etc.Wherein there is a class business to have a common characteristic: to require a plurality of users to receive identical business simultaneously.As weather forecast, news, advertisement, information, TV etc.In order to effectively utilize mobile network resource, introduce multimedia broadcast multicast service (Multimedia Broadcast MulticastService, hereinafter to be referred as MBMS), promptly in the mobile network, provide a data source to send the point-to-multipoint service of data to a plurality of users, realize that mobile core network and access network resource are shared, improve utilization rate of network resource, the especially Bao Gui interface resource of eating dishes without rice or wine.
Frame-forming protocol (Framing Protocol, hereinafter to be referred as FP) design in, in particular for the design limiting of the FP frame structure of MBMS to be merely able to a sub-district be the unit Data transmission, need all set up the FP carrying that is used for MBMS for each sub-district, and may on each is used for the FP carrying of MBMS, repeat to send the on all four MBMS content of content.Consider the most frequently used a kind of application scenarios: a Node B has been administered a plurality of sub-districts, terminal is all arranged at the MBMS that receives identical content in each sub-district.So, according to existing design, need set up the FP carrying of a plurality of MBMS of being used for, and the MBMS content that sends in this all FP carrying that is used for MBMS is identical, the significant wastage that will cause resource to be used like this, and the redundancy that sends the MBMS content.Therefore, there is defective in this design, does not meet the design core concept of MBMS resource-sharing.
The invention provides the multicasting method of a kind of MBMS of being used for, it is by rational frame structure, for a plurality of sub-districts that send the same MBMS content under the Node B, only need in a FP carrying that is used for MBMS, send unduplicated MBMS content and get final product, thereby reduce the wasting of resources and MBMS content transmission redundancy.
Summary of the invention
The multicast device and the method that the purpose of this invention is to provide a kind of MBMS of being used for, make for a plurality of sub-districts that send the same MBMS content under the Node B, only need in a FP carrying that is used for MBMS, send unduplicated MBMS content and get final product, thereby reduce the wasting of resources and MBMS content transmission redundancy.
For achieving the above object, the invention provides a kind of multicasting method that is used for the multimedia broadcast multicast service, comprise step: in described frame, data block is set, is used to store the data that will send;
Sub-district number mark is set, the sum of the sub-district that is used to represent that described data block need send in described frame;
In described frame, be provided for identifying the cell identification number of above-mentioned sub-district, carry the sign of the auxilliary public physical control signal of described multimedia broadcast multicast service, and the sign of carrying the forward access channel of described multimedia broadcast multicast service;
Described data block is sent to described sub-district.
Wherein, also comprise step: distribution mark in sub-district is set, is used to mark whether described data block is sent to a plurality of sub-districts in described frame.
Wherein, also comprise step: be provided for indicating the frame type mark of described frame type in described frame, described frame type comprises Frame and control frame.
The present invention also provides a kind of data transmission device that is used for the multimedia broadcast multicast service, is used for putting the mobile network MBMS data transmission of multiple spot, comprises a MBMS framer, and described MBMS framer comprises frame head territory and payload field:
Described frame head territory comprises:
Distribution mark in sub-district is used to mark whether data block is sent to a plurality of sub-districts; The frame type mark is used to indicate the frame type mark of frame type, and described frame type comprises Frame and control frame;
Connection Frame Number is used to represent that the frame of eating dishes without rice or wine of described payload field correspondence is at the concrete delivery time of eating dishes without rice or wine;
Transformat is indicated, and is used for determining the transformat of described payload field;
Cyclic redundancy value is used for cyclic redundancy check (CRC) is carried out in described frame head territory;
The transmit power levels mark is used for first-selected transmitting power of the flag transmission time interval and adjusts rank; And
Described payload field comprises:
Data block is used to store the MBMS data that will send, and comprises the data of one or more MBMS business;
Sub-district number mark, the sum of the sub-district that is used to represent that described data block need send;
Be used to identify the cell identification number of above-mentioned sub-district;
Carry the sign of the auxilliary public physical control signal of described multimedia broadcast multicast service;
Carry the sign of the forward access channel of described multimedia broadcast multicast service;
Payload field cyclic redundancy value is used for cyclic redundancy check (CRC) is carried out in this frame payload territory.
Wherein, described payload field also comprises idle extension bits, is used to place the cell that increases newly.
Wherein, described frame head territory also comprises the idle bit that is used for the word alignment.
Wherein, described payload field also comprises the bit of piecing together that is used for the word alignment.
The present invention also provides a kind of multicasting method that is used for the multimedia broadcast multicast service, is used for putting the mobile network MBMS data transmission of multiple spot, comprises a Frame, and described Frame comprises frame head territory and payload field:
Described frame head territory comprises:
Distribution mark in sub-district is used to mark whether data block is sent to a plurality of sub-districts;
The frame type mark is used to indicate the frame type mark of frame type, and described frame type comprises Frame and control frame;
Connection Frame Number is used to represent that the frame of eating dishes without rice or wine of described payload field correspondence is at the concrete delivery time of eating dishes without rice or wine;
Transformat is indicated, and is used for determining the transformat of described payload field;
Cyclic redundancy value is used for cyclic redundancy check (CRC) is carried out in described frame head territory;
The transmit power levels mark is used for first-selected transmitting power of the flag transmission time interval and adjusts rank; And
Described payload field comprises:
Data block is used to store the MBMS data that will send, and comprises the data of one or more MBMS business;
Sub-district number mark, the sum of the sub-district that is used to represent that described data block need send;
Be used to identify the cell identification number of above-mentioned sub-district;
Carry the sign of the auxilliary public physical control signal of described multimedia broadcast multicast service;
Carry the sign of the forward access channel of described multimedia broadcast multicast service;
Payload field cyclic redundancy value is used for cyclic redundancy check (CRC) is carried out in this frame payload territory.
Wherein, described payload field also comprises idle extension bits, is used to place the cell that increases newly.
Wherein, described frame head territory also comprises the idle bit that is used for the word alignment.
Wherein, described payload field also comprises the bit of piecing together that is used for the word alignment.
In sum, core of the present invention is: in frame structure, carry each cell information that transmits same MBMS content, make as long as in a FP carrying that is used for MBMS the unduplicated MBMS content of transmission.Thereby have a following tangible technique effect:
Reduce the FP bearing resource that is used for MBMS.In existing the realization, need set up the FP carrying that is used for MBMS for each sub-district.And behind employing the present invention, each Node B only need be set up a FP carrying that is used for MBMS.Reduced the FP bearing resource that need be used for MBMS greatly, do not wasted.
Reduce the redundant transmission of MBMS content.In existing the realization,, must repeat to send the MBMS content, directly cause data traffic big for a plurality of sub-districts that send the same MBMS content under the Node B.And behind employing the present invention, need not redundantly send, reduced the MBMS data traffic greatly.
Description of drawings
Fig. 1 is the data transmission device structure chart that the present invention is used for the multimedia broadcast multicast service;
Fig. 2 is a MBMS FP frame structure schematic diagram among the present invention;
Fig. 3 is the specific embodiment schematic diagram among the present invention.
Embodiment
Below in conjunction with accompanying drawing, describe the specific embodiment of the present invention in detail.
Fig. 1 is the data transmission device structure chart that the present invention is used for the multimedia broadcast multicast service, and as shown in Figure 1, data transmission device 1 comprises that with framer 2, it encapsulates framing with the MBMS data block, carries out multicast to a plurality of sub-districts (Cell) then and sends.Specifically as shown in Figure 2, Fig. 2 is a MBMSFP frame structure schematic diagram among the present invention, and described frame structure comprises two territories in frame head territory and frame payload territory.
Above-mentioned frame head territory has:
Cyclic redundancy value (Header CRC) for all bits to this frame head territory carry out the calculated value that obtains behind the cyclic redundancy algorithm, is used for cyclic redundancy check (CRC) is carried out in this frame head territory;
Frame type (Frame Type is hereinafter to be referred as FT) mark is used to indicate the frame type of this frame, specifically is a Frame or a control frame;
Connection Frame Number (Connection Frame Number is hereinafter to be referred as CFN), CFN have indicated the frame of eating dishes without rice or wine of this payload field correspondence at the concrete delivery time of eating dishes without rice or wine;
Transformat indication (Transport Format Indicator, hereinafter to be referred as TFI), be this locality of the transformat that transmits in the Transmission Time Interval number, determined the concrete transformat of payload in this frame payload territory thus, comprise data block length and data block set size;
Whether sub-district distribution mark (Cell Distribution Flag is hereinafter to be referred as CDF), expression need the data in the payload field are carried out the distribution of a plurality of sub-districts.If desired, then in payload field, carry each cell information that needs distribution; If do not need, then need not in payload field, to carry cell information;
Transmit power levels (Transmit power level is hereinafter to be referred as TPL) mark, indication first-selected transmitting power in Transmission Time Interval is adjusted rank;
Idle bit (Spare) without any practical significance, only is used for the word alignment.
Above-mentioned frame payload territory has:
Data block (Transport Block is hereinafter to be referred as TB) is used to store the data that will send, and just will may comprise the data of one or more MBMS business at the MBMS that eats dishes without rice or wine to send.The transformat of data block is determined by the TFI in the frame head territory, comprises data block length and data block set size, and for example, in a frame, data have divided a few blocks of data pieces to transmit.At the afterbody of each blocks of data piece, also may exist several to piece together bit (Pad), so that the word alignment;
Sub-district number (Cell Number) mark, the total number of the sub-district that is used to represent that data block need mail to; And the following cell of representing the sub-district that each data block need mail to:
Cell identification number (CID) is used for the sub-district is identified, and just the unique identification of sub-district is used to distinguish different districts; The sign (SecondaryCommon Control Physical Channel id is hereinafter to be referred as SCCPCH ID) of this auxilliary public physical control channel of carrying MBMS; Sign (hereinafter to be referred as FACH ID) with this forward access channel that carries MBMS;
Piece together bit (Pad), no practical significance only is used for the word alignment.
Payload field cyclic redundancy value (Payload CRC) is just carried out the calculated value that obtains behind the cyclic redundancy algorithm to all bits in this frame payload territory, is used for cyclic redundancy check (CRC) is carried out in this frame payload territory;
Idle extension bits (Spare Extension) is close to all the time and is positioned at before the Payload CRC, is idle no position at present, can place the cell that increases newly, in order to guarantee backward compatibility.
Fig. 3 is the specific embodiment schematic diagram among the present invention, below in conjunction with Fig. 3 the specific embodiment of the present invention is described in further detail.
The specific embodiment of the present invention provides a kind of FP frame structure by MBMS to realize that the MBMSIub mouthpiece carries multiplexing method, as shown in Figure 2.
For example, cell identification number is respectively 3 and need sends identical MBMS business with 2 sub-districts of 5 under certain B node, the FACH ID/SCCPCH ID of bearer service is respectively 4/2 and 2/1, at this MBMS business, only need set up a FP carrying between RNC and B node, use FP frame structure of the present invention to carry the information of 2 sub-districts then and indicate the B node in 2 sub-districts, to distribute identical MBMS business tine.About the tissue of MBMS FP frame structure of the present invention, be that example is described as follows with the framing procedure of a FP.
The step of framing comprises in the frame head territory:
Step S110: be designated as Frame in the 1st byte FT territory;
Step S120: fill in the CFN of this FP frame in the 2nd byte, for example extend this as 250;
Step S130: fill in the transformat indication of payload in the TFI territory of the 3rd byte, for example extend this as 3, after CDF territory indication B node is received this frame, need to carry out sub-district distribution operation;
Step S140: fill in transmitting power in the 4th byte and adjust rank, for example extend this as 1;
Step S150: all bits in frame head territory are carried out cyclic redundancy calculate the ring redundancy value, be filled up to the Header CRC territory of the 1st byte, frame head territory framing finishes.
The step of framing comprises in the payload field:
Step S210: since the 1st byte, according to the fast data block of filling in MBMS of counting of the data block length lotus data block of TFI indication in the frame head territory, at the afterbody of each blocks of data piece, to fill in several as required and piece together bit (Pad), the TB piece number in the present embodiment is 2;
After step S220:TB piece is filled in and finished, fill in the sub-district number in an ensuing byte, the sub-district number equals 2 in the present embodiment;
Step S230: in ensuing byte, fill in the CID/SCCPCH ID/FACHID of each sub-district, be respectively 3/4/2 and 5/2/1, one sub-district in the present embodiment and take 4 bytes;
Step S240: after cell information is filled in and finished, in ensuing byte, fill in idle extension bits, in the present embodiment free time need not, take 1 byte;
Step S250: all bits of payload field are carried out cyclic redundancy calculate the ring redundancy value, be filled up in the Payload CRC territory, the payload field framing finishes.
Thus, by in above-mentioned frame to the frame head territory with imitate the load territory and carry out framing, can in this frame structure, carry each cell information that transmits same MBMS content, make as long as in a FP carrying that is used for MBMS the unduplicated MBMS content of transmission.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (9)
1. multicasting method that is used for multimedia broadcast multicast service is used for the transmission of Frame being put multiple spot the mobile network, comprises the steps:
In described frame, data block is set, is used to store the data that will send;
Sub-district number mark is set, the sum of the sub-district that is used to represent that described data block need send in described frame;
In described frame, be provided for identifying the cell identification number of above-mentioned sub-district, carry the sign of the auxilliary public physical control signal of described multimedia broadcast multicast service, and the sign of carrying the forward access channel of described multimedia broadcast multicast service;
The frame head territory is set in described frame, and described frame head territory comprises:
Distribution mark in sub-district is used to mark whether data block is sent to a plurality of sub-districts;
The frame type mark is used to indicate the frame type mark of frame type, and described frame type comprises Frame and control frame;
Connection Frame Number is used to represent that the frame of eating dishes without rice or wine of payload field correspondence is at the concrete delivery time of eating dishes without rice or wine; Described payload field comprises: described data block, described sub-district number mark and described cell identification number;
Transformat is indicated, and is used for determining the transformat of described payload field;
Cyclic redundancy value is used for cyclic redundancy check (CRC) is carried out in described frame head territory;
The transmit power levels mark is used for first-selected transmitting power of the flag transmission time interval and adjusts rank;
Described data block is sent to described sub-district.
2. a data transmission device that is used for the multimedia broadcast multicast service is used for putting the mobile network MBMS data transmission of multiple spot, it is characterized in that comprise a MBMS framer, described MBMS framer comprises frame head territory and payload field:
Described frame head territory comprises:
Distribution mark in sub-district is used to mark whether data block is sent to a plurality of sub-districts; The frame type mark,
Be used to indicate the frame type mark of frame type, described frame type comprises Frame and control frame;
Connection Frame Number is used to represent that the frame of eating dishes without rice or wine of described payload field correspondence is at the concrete delivery time of eating dishes without rice or wine;
Transformat is indicated, and is used for determining the transformat of described payload field;
Cyclic redundancy value is used for cyclic redundancy check (CRC) is carried out in described frame head territory;
The transmit power levels mark is used for first-selected transmitting power of the flag transmission time interval and adjusts rank;
And
Described payload field comprises:
Data block is used to store the MBMS data that will send, and comprises the data of one or more MBMS business;
Sub-district number mark, the sum of the sub-district that is used to represent that described data block need send;
Be used to identify the cell identification number of above-mentioned sub-district;
Carry the sign of the auxilliary public physical control signal of described multimedia broadcast multicast service;
Carry the sign of the forward access channel of described multimedia broadcast multicast service;
Payload field cyclic redundancy value is used for cyclic redundancy check (CRC) is carried out in this frame payload territory.
3. transmitting device as claimed in claim 2 is characterized in that described payload field also comprises idle extension bits, is used to place the cell that increases newly.
4. as claim 2 or 3 described transmitting devices, it is characterized in that described frame head territory also comprises the idle bit that is used for the word alignment.
5. as claim 2 or 3 described transmitting devices, it is characterized in that described payload field also comprises the bit of piecing together that is used for the word alignment.
6. a multicasting method that is used for the multimedia broadcast multicast service is used for putting the mobile network MBMS data transmission of multiple spot, it is characterized in that, comprise forming a Frame, described Frame comprises frame head territory and payload field:
The setting in described frame head territory comprises:
Distribution mark in sub-district is set, is used to mark whether data block is sent to a plurality of sub-districts;
The frame type mark is set, is used to indicate the frame type mark of frame type, described frame type comprises Frame and control frame;
Connection Frame Number is set, is used to represent that the frame of eating dishes without rice or wine of described payload field correspondence is at the concrete delivery time of eating dishes without rice or wine;
The transformat indication is set, is used for determining the transformat of described payload field;
A cyclic redundancy value is set, is used for cyclic redundancy check (CRC) is carried out in described frame head territory;
The transmit power levels mark is set, is used for first-selected transmitting power of the flag transmission time interval and adjusts rank; And
The setting of described payload field comprises:
Data block is set, is used to store the MBMS data that will send, comprise the data of one or more MBMS business;
Sub-district number mark is set, the sum of the sub-district that is used to represent that described data block need send;
Be provided for identifying the cell identification number of above-mentioned sub-district;
The sign of the auxilliary public physical control signal of the described multimedia broadcast multicast service of carrying is set;
The sign of the forward access channel of the described multimedia broadcast multicast service of carrying is set;
Payload field cyclic redundancy value is set, is used for cyclic redundancy check (CRC) is carried out in this frame payload territory.
7. method as claimed in claim 6 is characterized in that, the setting of described payload field also comprises idle extension bits is set, and is used to place the cell that increases newly.
8. as claim 6 or 7 described methods, it is characterized in that the setting in described frame head territory also comprises the idle bit that is provided for the word alignment.
9. as claim 6 or 7 described methods, it is characterized in that the setting of described payload field also comprises the bit of piecing together that is provided for the word alignment.
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| CN200610089256XA CN101123744B (en) | 2006-08-11 | 2006-08-11 | A multicast device and method for multimedia broadcast and multicast service |
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| CN200610089256XA CN101123744B (en) | 2006-08-11 | 2006-08-11 | A multicast device and method for multimedia broadcast and multicast service |
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| CN101552950B (en) * | 2008-04-01 | 2011-04-20 | 大唐移动通信设备有限公司 | Method and device for transmitting multimedia broadcast service control data |
| CN102143592B (en) * | 2011-03-09 | 2015-12-16 | 中兴通讯股份有限公司 | A kind of method, RNC and system shortening FACH data transmission delay |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1467938A (en) * | 2002-07-08 | 2004-01-14 | 华为技术有限公司 | Transmission method for implementing multimedia broadcast and multicast service |
| CN1708960A (en) * | 2002-10-28 | 2005-12-14 | 诺基亚公司 | System and method for providing selection diversity for multicasting content |
| CN1744572A (en) * | 2005-08-31 | 2006-03-08 | 杭州华为三康技术有限公司 | Switchnig equipment and method for controlling multicasting data forwarding |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1467938A (en) * | 2002-07-08 | 2004-01-14 | 华为技术有限公司 | Transmission method for implementing multimedia broadcast and multicast service |
| CN1708960A (en) * | 2002-10-28 | 2005-12-14 | 诺基亚公司 | System and method for providing selection diversity for multicasting content |
| CN1744572A (en) * | 2005-08-31 | 2006-03-08 | 杭州华为三康技术有限公司 | Switchnig equipment and method for controlling multicasting data forwarding |
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