CN101369908B - Frame and signal transmitting method of multimedia broadcast and multicast system - Google Patents
Frame and signal transmitting method of multimedia broadcast and multicast system Download PDFInfo
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- CN101369908B CN101369908B CN200710141463XA CN200710141463A CN101369908B CN 101369908 B CN101369908 B CN 101369908B CN 200710141463X A CN200710141463X A CN 200710141463XA CN 200710141463 A CN200710141463 A CN 200710141463A CN 101369908 B CN101369908 B CN 101369908B
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Abstract
The invention discloses a frame and signal transmission method in a multimedia broadcasting and a multicast system. The frame comprises a conventional time slot, a control time slot and a downlink pilot time slot; the method comprises: a sender transmits a signal with control information to a receiver; the control information is transmitted through the control time slots in each frame; the control time slot borders upon the downlink pilot time slot and uses the downlink pilot time slot as a phase reference. The technical scheme of the invention saves the transmission resource, simplifies the devices of the multimedia and the multicast system, is useful for the operation business to rapidly develop the multimedia broadcasting and the multicast services; the optimization scheme thereof can also realize compatibility of the MBMS system and the TD-SCDMA frame structure and is useful for compatibility of the following TD-SCDMA evolution technology.
Description
Technical field
The present invention relates to MBMS (multimedia broadcasting and multicast) system, be specifically related to frame and signaling method in a kind of multimedia broadcasting and the multicast system.
Background technology
TD-SCDMA (TD SDMA) system is the 3-G (Generation Three mobile communication system) of Union of International Telecommunication (ITU) approval, has got into commercial stage at present, and its frame structure is as shown in Figure 1, in practical application, has proved feasible.Based on the technology of TD-SCDMA system with use also among continuous development.
Multimedia broadcasting and multicast (MBMS) are a kind of a kind of technology of utilizing the mobile network basis facility to carry out multimedia service; Influence in physical operator enlarges just day by day; 3G (Third Generation) Moblie gpp (3GPP) emphasis in the technical standard of having released has been considered this business; Simultaneously in the works, considered the business support of MBMS special carrier specially in WeiLai Technology evolution.For FDD (FDD) mode, the structure of time slot that MBMS supports is identical with conventional business support.And the structure of time slot under time division duplex (TDD) mode still remains further to be studied.
In practical application, can design a kind of MBMS system, and the traffic carrier that MBMS is all is used for the relevant business transmission of MBMS with external feedback.In order to utilize TD-SCDMA technology to launch broadcasting service better, the prior art of inheriting and develop TD-SCDMA is very important.This will help the quick application of TD-SCDMA technology in the MBMS system, and reduce equipment development and networking cost.
In the design of disclosed a kind of frame structure, as shown in Figure 2, through being provided with a pilot time slot before at time slot 0 (TS0); And after time slot 0, be provided with a control time slot, professional to support MBMS, this has not only changed the position of structure of time slot; And make the terminal when the processing controls time slot, and there is not phase reference, perhaps need introduce extra phase reference; Thereby the complexity of increasing system and equipment, and can't be compatible with existing TD-SCDMA frame structure.
Summary of the invention
The technical problem that the present invention will solve provides frame and the signaling method in a kind of MBMS system, need not to introduce extra phase reference into the control time slot, has simplified MBMS system and equipment.
In order to address the above problem, the invention provides the signaling method in a kind of multimedia broadcasting and the multicast MBMS system, comprising: transmit leg sends signal and gives the recipient, carries control information in the said signal; Said control information is sent through the control time slot in each frame; It is characterized in that: said control time slot is adjacent with descending pilot frequency time slot, with descending pilot frequency time slot as phase reference.
The length of each frame that further, is sent is 5 milliseconds; Said descending pilot frequency time slot is 200 microseconds with the total length of control time slot.
Further, said control time slot is followed after said descending pilot frequency time slot.
Further, the length of said descending pilot frequency time slot is 75 microseconds, and the length of control time slot is 125 microseconds.
Further, said transmit leg is a radio network controller, and said recipient is a user terminal.
The present invention also provides the frame in a kind of MBMS system, comprising: conventional time slot, control time slot and descending pilot frequency time slot; It is characterized in that: said descending pilot frequency time slot with control time slot adjacent, said control time slot with descending pilot frequency time slot as phase reference.
Further, said descending pilot frequency time slot and control time slot are between any two conventional time slots, or before all conventional time slots, or after all conventional time slots.
Further, said frame length is 5 milliseconds; Said descending pilot frequency time slot is 200 microseconds with the total length of control time slot.
Further, said control time slot is followed after said descending pilot frequency time slot.
Further, the length of said descending pilot frequency time slot is 75 microseconds, and the length of control time slot is 125 microseconds.
In sum, the invention provides frame and signaling method in a kind of MBMS system, simplified the frame structure of prior art MBMS system, saved transfer resource, help operator and launch the MBMS business rapidly; Its prioritization scheme can also realize that MBMS system and TD-SCDMA frame structure are compatible well, and helps the evolution technology of compatible follow-up TD-SCDMA.
Description of drawings
Fig. 1 is the frame structure sketch map of prior art TD-SCDMA system;
Fig. 2 is a kind of MBMS frame structure sketch map based on TD-SCDMA technology in the prior art;
Fig. 3 is the sketch map of a kind of MBMS frame structure of proposing of the present invention;
Fig. 4 is the sketch map of MBMS frame structure in the application example of the present invention.
Embodiment
In 5 milliseconds frame structure of present TD-SCDMA system, have independently descending pilot frequency time slot DwPTS, protection time slot GP and a uplink pilot time slot UpPTS, all the other are conventional time slot.For the MBMS system that adopts the band external feedback, the protection time slot can be used for other purposes with uplink pilot time slot, and descending pilot frequency time slot still can be used for synchronous to network of terminal equipment.Keeping under the constant or constant basically situation of conventional structure of time slot, making full use of and protect time slot and uplink pilot time slot just to seem particularly important.
Present embodiment provides the frame in a kind of MBMS system, and is as shown in Figure 3, comprising: conventional time slot, control time slot and descending pilot frequency time slot; Said conventional time slot is the TS0 that is used for bearer service in the prior art, TS1 etc.; Said descending pilot frequency time slot is adjacent with the control time slot; Control time slot with descending pilot frequency time slot as phase reference; The terminal just can be with descending pilot frequency time slot as phase reference when the processing controls time slot like this, and need not introduce extra phase reference, also need not carry phase reference information in the control time slot; Simplify MBMS system and equipment, and saved transfer resource.The control time slot is followed after said descending pilot frequency time slot; Descending pilot frequency time slot and control time slot are between any two conventional time slots, or before all conventional time slots, or after all conventional time slots.Frame length is 5 milliseconds in this frame structure, and setting capable pilot time slot length is the X microsecond, and the control slot length is the Y microsecond, and the two total length can be but is not limited to 200 microseconds; X can be but is not limited to 75 microseconds, and Y can be but is not limited to 125 microseconds.In realization, can think that also descending pilot frequency time slot and control time slot are same time slot.
Present embodiment also provides the signaling method in a kind of MBMS system;, transmit leg carries control information in the said signal when sending signal to the recipient; Said transmit leg can but be not limited to RNC (radio network controller), also can be other network equipment; The recipient can but be not limited to UE (user terminal), also can be other network equipment; Control information is sent through the control time slot in each frame; Said control information is consistent with control time slot and prior art definition.Said control time slot is adjacent with descending pilot frequency time slot, with descending pilot frequency time slot as phase reference.Control time slot can but be not limited to follow after descending pilot frequency time slot; Descending pilot frequency time slot and control time slot are between any two conventional time slots, or before all conventional time slots, or after all conventional time slots.For with existing TD-SCDMA system in frame structure compatible mutually, can set each frame length is 5 milliseconds, can but be not limited to make descending pilot frequency time slot and control time slot total length 200 microseconds; And, can but be not limited to make descending pilot frequency time slot equal in length in descending pilot frequency time slot length and the existing TD-SCDMA system, be 75 microseconds, GP and the length sum of UPPTS in control slot length and the existing TD-SCDMA system are equated, be 125 microseconds.In addition, descending pilot frequency time slot can be just with the DwPTS in the TD-SCDMA frame.All the other professional information are carried out with conventional TD-SCDMA business identical; Terminal equipment is utilizing after descending pilot frequency time slot carries out down-going synchronous; Utilize the phase reference demodulation of descending pilot frequency time slot to be carried on the control information on the control time slot; Thereby obtain professional configuration information, and it is professional optionally in conventional time slot, to receive interested MBMS.
Further specify with an application example below.
When sending, RNC carries control information when signal is given UE; Control information is sent with the control time slot in each frame; As shown in Figure 4, in each frame control time slot Control Slot adjacent with descending pilot frequency time slot Pilot and with descending pilot frequency time slot as phase reference.The control time slot is followed after descending pilot frequency time slot; Descending pilot frequency time slot and control time slot are between any two conventional time slots; Frame length is 5 milliseconds; Descending pilot frequency time slot is 200 microseconds with the total length of control time slot; Here taking off capable pilot time slot length is 75 microseconds, and the control slot length is 125 microseconds.DWPTS length is that 75 microseconds, GP and UPPTS total length are 125 microseconds in the TD-SCDMA system of Fig. 1, and promptly the length summation of DWPTS, GP and UPPTS is 200 microseconds; DWPTS among Fig. 4 and the DWPTS equal in length among Fig. 1 like this, the control time slot among Fig. 4 equates with the length sum of UPPTS with GP among Fig. 1; This example is on the basis of the existing structure of time slot of multiplexing TD-SCDMA system; Utilize the control information of the control slot transmission MBMS system of protection time slot and uplink pilot time slot structure; And all the other all time slots all can be used for the transmission of MBMS business datum; And descending pilot frequency time slot can be exactly the DwPTS in the TD-SCDMA frame, thus the network and the terminal equipment of compatible as far as possible existing TD-SCDMA system.
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 (5)
1. the signaling method in multimedia broadcasting and the multicast MBMS system, comprising: transmit leg sends signal and gives the recipient, carries control information in the said signal; Said control information is sent through the control time slot in each frame; It is characterized in that: said control time slot is adjacent with descending pilot frequency time slot, with descending pilot frequency time slot as phase reference.
2. signaling method as claimed in claim 1 is characterized in that: the length of each frame that is sent is 5 milliseconds; Said descending pilot frequency time slot is 200 microseconds with the total length of control time slot.
3. signaling method as claimed in claim 1 is characterized in that: said control time slot is followed after said descending pilot frequency time slot.
4. the described signaling method of claim 3, it is characterized in that: the length of said descending pilot frequency time slot is 75 microseconds, the length of control time slot is 125 microseconds.
5. signaling method as claimed in claim 1 is characterized in that: said transmit leg is a radio network controller, and said recipient is a user terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710141463XA CN101369908B (en) | 2007-08-19 | 2007-08-19 | Frame and signal transmitting method of multimedia broadcast and multicast system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710141463XA CN101369908B (en) | 2007-08-19 | 2007-08-19 | Frame and signal transmitting method of multimedia broadcast and multicast system |
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| Publication Number | Publication Date |
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| CN101369908A CN101369908A (en) | 2009-02-18 |
| CN101369908B true CN101369908B (en) | 2012-02-29 |
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| CN200710141463XA Expired - Fee Related CN101369908B (en) | 2007-08-19 | 2007-08-19 | Frame and signal transmitting method of multimedia broadcast and multicast system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101917251B (en) * | 2010-08-04 | 2012-09-26 | 中国传媒大学 | Frequency interlacer and frequency interlacing method in DTMB (Digital Terrestrial Multimedia Broadcasting) system |
| CN116800383A (en) * | 2023-08-21 | 2023-09-22 | 北京紫光芯能科技有限公司 | Multi-channel communication method, device, equipment and medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1455538A (en) * | 2002-04-27 | 2003-11-12 | 三星电子株式会社 | Soft switch-over method in CDMA system for multi-media broadcasting/organized broadcasting business |
| CN1476259A (en) * | 2002-08-16 | 2004-02-18 | ��������ͨ�ż����о�����˾ | Multi media broadcasting and method of organizing broadcasting business call finding |
| CN1791260A (en) * | 2004-12-13 | 2006-06-21 | 上海贝尔阿尔卡特股份有限公司 | Method and apparatus for transmitting multimedia broadcast/multicast service apprized indication |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1455538A (en) * | 2002-04-27 | 2003-11-12 | 三星电子株式会社 | Soft switch-over method in CDMA system for multi-media broadcasting/organized broadcasting business |
| CN1476259A (en) * | 2002-08-16 | 2004-02-18 | ��������ͨ�ż����о�����˾ | Multi media broadcasting and method of organizing broadcasting business call finding |
| CN1791260A (en) * | 2004-12-13 | 2006-06-21 | 上海贝尔阿尔卡特股份有限公司 | Method and apparatus for transmitting multimedia broadcast/multicast service apprized indication |
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| CN101369908A (en) | 2009-02-18 |
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