CN101729517B - Method and device for transmitting and receiving multimedia broadcast/multicast service (MBMS) - Google Patents
Method and device for transmitting and receiving multimedia broadcast/multicast service (MBMS) Download PDFInfo
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- CN101729517B CN101729517B CN200810224198A CN200810224198A CN101729517B CN 101729517 B CN101729517 B CN 101729517B CN 200810224198 A CN200810224198 A CN 200810224198A CN 200810224198 A CN200810224198 A CN 200810224198A CN 101729517 B CN101729517 B CN 101729517B
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Abstract
The invention discloses a method and a device for transmitting and receiving a multimedia broadcast/multicast service (MBMS). The receiving method comprises the following steps that: base stations send information to a terminal in a time division duplex (TDD) mode; at least two base stations send the information at different frequencies, wherein the information comprises indication information for the terminal to combine and receive the MBMS; and the at least two base stations transmit the same MBMS at different frequencies in different time slots. The technical scheme of the invention realizes the combination and the reception of the MBMS under a different-frequency network like the same operations under a same-frequency network by only increasing a small quantity of signaling messages, thereby reducing or eliminating an MBMS empty area caused by avoiding same-frequency interference.
Description
Technical field
The present invention relates to moving communicating field, particularly, the present invention relates to the CMMB communications field.
Background technology
MBMS is the multimedia broadcasting and multicast function of definition among the 3GPP (3rd Generation Partnership Project, third generation partner program).The MBMS technology is mainly at existing CDMA (CodeDivision Multiple Access; Code division multiple access) in the system, original classes of messages broadcast capability is strengthened, the technology that a little arrives the unidirectional multimedia service of multiple spot is provided; Thereby realize that Internet resources are shared, improve utilization rate of network resource.MBMS (Multimedia Broadcast Multicast Service; Multimedia broadcast multi-broadcasting business) supports multi-media broadcasting service and two kinds of patterns of multicast service; Both can be with multimedia video information directly to all users broadcastings; The contracted user that also can send to one group of charge watches, can help operator to carry out multimedia advertising, free and multiple commercial application such as pay-television channels, multimedia message mass-sending.MBMS can provide the following biography of the unidirectional multi-medium data from any to multiple spot with mode efficient, economic, that share for a plurality of users.
The MBMS technology that adopts at present is commonly with frequently netting broadcast technology; Be also referred to as UTN (Union Time-Slot Network is with the time slot net) technology in the MBMS of TDD system: require the identical wireless signal of all adjacent base station synchronized transmissions in the MBMS service area; Requirement identical frequency, time slot, code channel with the time be interrupted and upload defeated identical data, distribute scrambler and Midamble training sequence code unitedly for the MBMS business time-slot simultaneously.Under the UTN pattern, the terminal can be regarded as multipath signal with the signal that comes from different base station, merges reception.Guaranteeing physical frame synchronously and under the synchronous condition of resource distribution, different base stations issues identical data, guarantees that promptly data send when synchronous, the same MBMS business that could guarantee to issue in different base stations can end side eat dishes without rice or wine merge.The MBMS business of TDD also supports chip to merge in physical layer except SFN (Single Frequency Network, SFN) merges.Time slot to the transmission broadcasting service adopts existing net configuration frequently together, and promptly the configuration of scrambler and Midamble sign indicating number is still based on existing network configuration; The joint detection algorithm of grand branch collection is chosen and is carried out grand branch set neighbor cell also according to the measurement to each homogeneous frequency adjacent area; The broadcast/group broadcast signal of the neighbor cell that obtains this sub-district and choose, and it is carried out multi-cell channel estimate, the channel response result of this sub-district and said neighbor cell obtained; Calculate the transmission matrix of each sub-district respectively and merge according to the channel response result of each sub-district, utilize to merge the back transmission matrix and carry out joint-detection, obtain to detect data.Perhaps earlier the transmission matrix of each sub-district of obtaining after calculating is carried out joint-detection respectively, then the result who detects is carried out the branch set also, obtain to detect data.Utilize this algorithm, can improve the professional receptivity of common-frequency broadcasting greatly, so the UTN technology has improved the availability of frequency spectrum effectively.
Yet; In the network of reality, the adjacent zones of different in sub-district can employablely be different frequency, for example along with the continuous use of frequency resource; Disturb in order to evade the same frequency that possibly occur; More frequency resources is used for dilatation in some areas, is not to be pure with network frequently thereby cause the business time-slot of TD-SCDMA (TimeDivision-Synchronization Code Division Multiple Access, TD SDMA inserts) network.
Therefore, when the sub-district is adjacent, just may cause each sub-district that belongs to the same MBMS business but to use different frequencies to send the professional situation appearance of MBMS owing to evade with the frequency interference.With the frequency network technology, will cause the professional empty service area of MBMS based on existing.As shown in Figure 1; In this scene, the zone of sending professional zone and sending business with frequency f 1 with frequency f 0 belongs to same MBMS service area, and it is professional to use the SFN technology to send MBMS; But use different frequencies owing to evading with disturbing frequently; With this understanding, then can cause the professional empty service area of MBMS as shown in Figure 1, this service area can't use the UTN technology to improve service quality.
Therefore, be necessary to propose a kind of technical scheme, solve the MBMS business non-with the transmission in the net frequently and the problem of reception.
Summary of the invention
The problem that the present invention will solve is to propose a kind of multimedia broadcast multi-broadcasting business MBMS sending, receiving method and device, to solve the problem of MBMS business in the non-professional hole region that occurs with the transmission in the net frequently with when receiving.
The invention discloses a kind of multimedia broadcast multi-broadcasting business MBMS sending method, may further comprise the steps:
Terminal transmits information is given with the mode of TDD in the base station, and information is sent with different frequency at least two said base stations, and said information comprises that said terminal merges the indication information that receives the MBMS business;
At least two said base stations are sent same MBMS business at different time slots with different frequency.
According to embodiments of the invention, said indication information sends through MBMS control channel MCCH.
According to embodiments of the invention, said indication information comprises:
The list information of the frequency information of said base station, the adjacent base station of said base station, the radio frames of sending the professional gap information of said MBMS and carrying the MBMS business.
According to embodiments of the invention, at least two said base stations begin to send same MBMS business at different time slots and comprise:
Same MBMS business is sent to differ at least one time slots in said base station.
According to embodiments of the invention, at least two said base stations begin to send same MBMS business at different time slots and comprise:
It is professional that same MBMS is sent in different radio frames in said base station.
The invention also discloses a kind of multimedia broadcast multi-broadcasting business MBMS method of reseptance, may further comprise the steps:
The terminal receives the information that send the base station with the mode of TDD; Said information comprises that said terminal merges the indication information that receives same MBMS business, and it is professional that at least two said base stations of said indication information indication are sent same MBMS with different frequency at different time slots;
According to said indication information, it is professional that said terminal receives the said MBMS that sends said base station at corresponding time slot, and receive frequency is switched at said thereafter terminal, and it is professional to receive the identical said MBMS that sends other said base station at corresponding time slot;
The same MBMS business that said terminal will be received from least two said base stations merges reception.
According to embodiments of the invention, said terminal receives said indication information through MBMS control channel MCCH.
According to embodiments of the invention, said indication information comprises:
The list information of the frequency information of said base station, the adjacent base station of said base station, the radio frames of sending the professional gap information of said MBMS and carrying the MBMS business.
According to embodiments of the invention, said terminal is at least one time slots intra frequency, and it is professional to receive the identical said MBMS that sends other said base station.
According to embodiments of the invention, it is professional that said terminal receives the identical said MBMS that sends said base station in different radio frames.
The invention also discloses a kind of multimedia broadcast multi-broadcasting business MBMS receiving system, comprising:
Receiver module; Said receiver module is used to receive the information that send the base station; Said information comprises that said terminal merges the indication information that receives same MBMS business, and it is professional that at least two said base stations of said indication information indication are sent same MBMS with different frequency at different time slots;
Handover module, said handover module switch the operating frequency of said receiving system according to said indication information, and it is professional to make that said receiver module receives same MBMS at corresponding time slot;
Merge module, the same MBMS business that said merging module will be received from least two said base stations merges reception.
According to embodiments of the invention, said handover module is at least one time slots intra frequency, and it is professional to make that said receiver module receives the identical said MBMS that sends other said base station at corresponding time slot.
According to embodiments of the invention, said apparatus also comprises sending module,
Said sending module carries out uplink after said receiver module receives said MBMS business for the first time, said handover module switch operating frequency after ascending time slot, and it is professional to receive the identical said MBMS that sends other said base station.
Technical scheme of the present invention has the following advantages; The present invention is professional through in the non-adjacent base station of netting with frequency, sending same MBMS with different time slots; The terminal is sent same MBMS business at different time slots with different frequency through merging at least two base stations of reception; Improve non-receptivity of netting broadcasting service together frequently, avoided occurring the zone in the professional cavity of MBMS, promoted systematic function.In addition, realize technical scheme of the present invention, only need on the basis of original system, increase a spot of signaling consumption and just can realize, need not existing system is made big adjustment, realize simple.
Description of drawings
Fig. 1 is the sketch map of the professional hole region of MBMS;
Fig. 2 is the professional flow chart that sends of MBMS;
Fig. 3 is the sketch map of a wireless timeslot structure;
Fig. 4 is the professional flow chart that receives of MBMS;
Fig. 5 is the functional structure chart of MBMS service receiving device.
Embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes in further detail:
As shown in Figure 2, the flow chart of the multimedia broadcast multi-broadcasting business MBMS sending method that proposes for the present invention, the present invention proposes base station side notice terminal will merge reception to a plurality of same MBMS service sources from different base station that receive.The method that the present invention proposes may further comprise the steps:
S201: terminal transmits information is given in the base station, and indicating terminal merges the MBMS business that receives.
In step S201, terminal transmits information is given with the mode of TDD in the base station, and information is sent with different frequency at least two base stations, and wherein, information comprises that the terminal merges the professional needed indication information of reception MBMS.
In the network of TD-SCDMA system, just may cause each sub-district that belongs to the same MBMS business but to use different frequencies to send the professional situation appearance of MBMS owing to evade with the frequency interference.The present invention is through increasing a spot of message signaling to existing system, indicating terminal merges a plurality of MBMS business that receive.
In order to realize the present invention, also reduce change simultaneously to existing system, above-mentioned indication information can send a terminal through MBMS control channel MCCH.
For better indicating terminal receives MBMS, common above-mentioned indication information comprises:
The frequency information of base station, promptly each sends the frequency information of professional base station with different frequency; The list information of the adjacent base station of base station, what usually the terminal received is the signal of a plurality of adjacent base stations, so the terminal list information that obtains adjacent base station helps the terminal and understands current what the identical MBMS service sources that have; Send the professional gap information of MBMS; Because the terminal need merge a plurality of MBMS business of sending the base station of frequency from difference that receive; Therefore intermediate terminals should be switched receive frequency, staggers in the zero hour of sending same business in each base station, promptly should reserve the regular hour to let terminal switching frequency and prepare to receive the MBMS business datum of another base station; So the base station should be with sending the professional gap information notice terminal of MBMS, so that the merging at next step terminal receives; Carry the professional radio frames of MBMS; Because each base station can be positioned at same TTI (Transmission Time Interval in the same MBMS business of transmission; Transmission Time Interval) different radio frames in; The promptly professional radio frames that can be positioned at the certain hour interval, so the base station should notify the terminal to carry the professional radio frames of MBMS.
S202: at least two base stations are sent same MBMS business at different time slots with different frequency.
In step S202, at least two said base stations are sent same MBMS business at different time slots with different frequency, and its objective is to needs provide the terminal that receives merging provides a plurality of MBMS professional.
As shown in Figure 3, be the business time-slot distribution diagram of a radio frames realizing one embodiment of the present of invention.Up arrow is represented uplink among the figure, and arrow is down represented downlink transfer.
In order to let terminal switching frequency and preparation receive the MBMS business datum of another base station, send same MBMS business to differ at least one time slots between the base station.
The merging receive mode of the similar SFN that the present invention adopts is described below in conjunction with Fig. 3.
In base station, f0 zone with same MBMS business configuration at the T3 of main carrier time slot, main carrier is that frequency is f0.In another base station, f1 zone with same MBMS business configuration at the T5 of second auxilliary carrier wave time slot, second auxiliary carrier frequency rate is f1.Different and the middle time slot of being separated by of time slot be set be for the terminal that guarantees to have only the single carrier receiving ability after the MBMS business of receiving on the f0, it is professional to switch to the identical MBMS of receptions on the f1 frequency if having time, and then carries out the base band merging.Therefore adopt that the professional speed of terminal demodulates MBMS can postpone several time slots under the situation that accurate SFN mode merges.
Except time slot was provided with difference, other all parameters all disposed identical, and this is can merge in physical layer in order to guarantee.Need do expansion to MCCH message then, increase the non-information that merges with needs frequently of neighbor cell.Comprise that needs merge the professional frequency of MBMS, and time slot, the accurate SFN of employing that need in MCCH message, increase notice UE simultaneously merges message.Can reduce or eliminate owing to evade through this method with disturbing the professional hole region of the MBMS that causes frequently.
Can find out through foregoing description,, just can be implemented in non-frequently off the net together being similar to and receive, can reduce or eliminate the MBMS business hole region that causes with disturbing frequently owing to evading with the merging of the MBMS business of net frequently through increasing a spot of signaling message.
Obviously, the method for above-mentioned time slot allocation can be made the adjustment of various ways.For example, at least two said base stations begin to send same MBMS business at different time slots and comprise: it is professional that same MBMS is sent in different radio frames in said base station.
When the terminal is in the area of coverage of three base stations simultaneously, as shown in Figure 3 with this understanding, in base station, f0 zone with same MBMS business configuration at the T4 of main carrier time slot, in another base station, f1 zone same MBMS business configuration is sent at the T6 time slot.The 3rd descending time slot of base station in next frame sends same MBMS business in the f2 zone, can be the T4 time slot, T5 time slot, perhaps T6 time slot.The terminal is carried out base band and is merged after receiving the last MBMS business of f0, f1, f2.Usually, the terminal is accomplished to merge in a TTI and is received.
The invention also discloses a kind of multimedia broadcast multi-broadcasting business MBMS method of reseptance, as shown in Figure 4, the flow chart of the multimedia broadcast multi-broadcasting business MBMS method of reseptance that proposes for the present invention may further comprise the steps:
S401: the terminal receives indication information.
In step S401; The terminal receives the information that send the base station with the mode of TDD; Said information comprises that said terminal merges the indication information that receives same MBMS business, and it is professional that at least two said base stations of said indication information indication are sent same MBMS with different frequency at different time slots.
In order to realize the present invention, also reduce change simultaneously to existing system, the terminal can receive above-mentioned indication information through MBMS control channel MCCH.
For better indicating terminal receives MBMS, common above-mentioned indication information comprises:
The frequency information of base station, promptly each sends the frequency information of professional base station with different frequency; The list information of the adjacent base station of base station, what usually the terminal received is the signal of a plurality of adjacent base stations, so the terminal list information that obtains adjacent base station helps the terminal and understands current what the identical MBMS service sources that have; Send the professional gap information of MBMS; Because the terminal need merge a plurality of MBMS business of sending the base station of frequency from difference that receive; Therefore intermediate terminals should be switched receive frequency, staggers in the zero hour of sending same business in each base station, promptly should reserve the regular hour to let terminal switching frequency and prepare to receive the MBMS business datum of another base station; So the base station should be with sending the professional gap information notice terminal of MBMS, so that the merging at next step terminal receives; Carry the professional radio frames of MBMS; Because each base station can be positioned at the different radio frames of same TTI in the same MBMS business of transmission; The promptly professional radio frames that can be positioned at the certain hour interval, so the base station should notify the terminal to carry the professional radio frames of MBMS.
S402: it is professional that the terminal receives same MBMS at different time slots with different frequency.
In step S402; According to said indication information; It is professional that said terminal receives the said MBMS that sends said base station at corresponding time slot, and receive frequency is switched at said thereafter terminal, and it is professional to receive the identical said MBMS that sends other said base station at corresponding time slot.
The terminal can receive the data from a plurality of base stations in many ways, and for example, the terminal is at least one time slots intra frequency, and it is professional to receive the identical said MBMS that sends other said base station.More specifically, the terminal receives the identical said MBMS business that send said base station at different Frames.
When the terminal was in the area of coverage of three base stations simultaneously, as shown in Figure 3 with this understanding, it is professional at the same MBMS that the T4 time slot sends that the terminal receives the base station in the f0 zone, and it is professional at the same MBMS that the T6 time slot sends to receive another base station in the f1 zone; Thereafter the terminal receives the same MBMS business that the descending time slot of the 3rd base station in next frame sends in the f2 zone, and said time slot can be the T4 time slot, T5 time slot, perhaps T6 time slot.The terminal is carried out base band and is merged after receiving the last MBMS of f0, f1, f2.Usually, the terminal is accomplished to merge in a TTI and is received.
S403: the terminal merges the same MBMS business that receives.
In step S403, the same MBMS business that said terminal will be received from least two said base stations merges reception.
Can find out through foregoing description,, just can be implemented in non-frequently off the net together being similar to and receive, can reduce or eliminate the MBMS business hole region that causes with disturbing frequently owing to evading with the merging of the MBMS business of net frequently through increasing a spot of signaling message.
As shown in Figure 5, the invention also discloses a kind of multimedia broadcast multi-broadcasting business MBMS receiving system 500, comprising:
Receiver module 510, receiver module 510 are used to receive the information that send the base station, and information comprises that the terminal merges the indication information that receives same MBMS business, and it is professional that at least two base stations of indication information indication are sent same MBMS with different frequency at different time slots;
Handover module 520, handover module 520 switch the operating frequency of receiving system 500 according to indication information, and it is professional to make that receiver module 510 receives same MBMS at corresponding time slot;
Merge module 530, the same MBMS business that merging module 530 will be received from least two base stations merges reception.
As the execution mode of the said equipment, handover module 520 is at least one time slots intra frequency, and it is professional to make that receiver module 510 receives the identical MBMS that sends other base station at corresponding time slot.
As the execution mode of the said equipment, the said equipment also comprises sending module 540,
Sending module 540 carries out uplink after receiver module 510 receives the MBMS business for the first time, handover module 520 switch operating frequencies after ascending time slot, and it is professional to receive the identical MBMS that sends other base station.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (11)
1. a multimedia broadcast multi-broadcasting business MBMS sending method is characterized in that, may further comprise the steps:
Terminal transmits information is given with the mode of TDD in the base station, and information is sent with different frequency at least two said base stations, and said information comprises that said terminal merges the indication information that receives the MBMS business;
At least two said base stations are sent same MBMS business at different time slots with different frequency,
Wherein, said indication information sends through MBMS control channel MCCH,
And wherein; Said indication information to said MCCH sends is expanded; Increase the non-information that merges with needs frequently of neighbor cell; Comprise that needs merge MBMS professional frequency and time slot, and need in said indication information, increase the accurate SFN SFN merging of the employing of notifying said terminal message.
2. multimedia broadcast multi-broadcasting business MBMS sending method as claimed in claim 1 is characterized in that said indication information comprises:
The list information of the frequency information of said base station, the adjacent base station of said base station, the radio frames of sending the professional gap information of said MBMS and carrying the MBMS business.
3. multimedia broadcast multi-broadcasting business MBMS sending method as claimed in claim 2 is characterized in that, at least two said base stations begin to send same MBMS business at different time slots and comprise:
Same MBMS business is sent to differ at least one time slots in said base station.
4. multimedia broadcast multi-broadcasting business MBMS sending method as claimed in claim 3 is characterized in that, at least two said base stations begin to send same MBMS business at different time slots and comprise:
It is professional that same MBMS is sent in different radio frames in said base station.
5. a multimedia broadcast multi-broadcasting business MBMS method of reseptance is characterized in that, may further comprise the steps:
The terminal receives the information that send the base station with the mode of TDD; Said information comprises that said terminal merges the indication information that receives same MBMS business, and it is professional that at least two said base stations of said indication information indication are sent same MBMS with different frequency at different time slots;
According to said indication information, it is professional that said terminal receives the said MBMS that sends said base station at corresponding time slot, and receive frequency is switched at said thereafter terminal, and it is professional to receive the identical said MBMS that sends other said base station at corresponding time slot;
The same MBMS business that said terminal will be received from least two said base stations merges reception,
Wherein, said terminal receives said indication information through MBMS control channel MCCH,
And wherein; Said indication information to said MCCH sends is expanded; Increase the non-information that merges with needs frequently of neighbor cell; Comprise that needs merge MBMS professional frequency and time slot, and need in said indication information, increase the accurate SFN SFN merging of the employing of notifying said terminal message.
6. multimedia broadcast multi-broadcasting business MBMS method of reseptance as claimed in claim 5 is characterized in that said indication information comprises:
The list information of the frequency information of said base station, the adjacent base station of said base station, the radio frames of sending the professional gap information of said MBMS and carrying the MBMS business.
7. multimedia broadcast multi-broadcasting business MBMS method of reseptance as claimed in claim 6 is characterized in that, said terminal is at least one time slots intra frequency, and it is professional to receive the identical said MBMS that sends other said base station.
8. multimedia broadcast multi-broadcasting business MBMS method of reseptance as claimed in claim 7 is characterized in that, it is professional that said terminal receives the identical said MBMS that sends said base station in different radio frames.
9. a multimedia broadcast multi-broadcasting business MBMS receiving system is characterized in that, comprising:
Receiver module; Said receiver module is used to receive the information that send the base station; Said information comprises that said terminal merges the indication information that receives same MBMS business, and it is professional that at least two said base stations of said indication information indication are sent same MBMS with different frequency at different time slots;
Handover module, said handover module switch the operating frequency of said receiving system according to said indication information, and it is professional to make that said receiver module receives same MBMS at corresponding time slot;
Merge module, the same MBMS business that said merging module will be received from least two said base stations merges reception,
Wherein, Said indication information is expanded; Increase the information of the needs merging of the non-frequency together of neighbor cell, comprise that needs merge MBMS professional frequency and time slot, and need in said indication information, increase the accurate SFN SFN merging of the employing of notifying said terminal message.
10. multimedia broadcast multi-broadcasting business MBMS receiving system as claimed in claim 9; It is characterized in that; Said handover module is at least one time slots intra frequency, and it is professional to make that said receiver module receives the identical said MBMS that sends other said base station at corresponding time slot.
11. multimedia broadcast multi-broadcasting business MBMS receiving system as claimed in claim 10 is characterized in that, also comprises sending module,
Said sending module carries out uplink after said receiver module receives said MBMS business for the first time, said handover module switch operating frequency after ascending time slot, and it is professional to receive the identical said MBMS that sends other said base station.
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| CN200810224198A CN101729517B (en) | 2008-10-27 | 2008-10-27 | Method and device for transmitting and receiving multimedia broadcast/multicast service (MBMS) |
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| CN200810224198A CN101729517B (en) | 2008-10-27 | 2008-10-27 | Method and device for transmitting and receiving multimedia broadcast/multicast service (MBMS) |
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| CN101729517B true CN101729517B (en) | 2012-09-05 |
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| CN102325142A (en) * | 2011-09-19 | 2012-01-18 | 大唐移动通信设备有限公司 | Message treatment method and equipment |
| JP6445356B2 (en) * | 2015-03-11 | 2018-12-26 | 古野電気株式会社 | Mobile body monitoring system, slave unit, master unit, and program |
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| CN101262626A (en) * | 2007-03-05 | 2008-09-10 | 大唐移动通信设备有限公司 | MBMS channel transmission method and system, network and terminal |
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| CN1941948A (en) * | 2005-09-30 | 2007-04-04 | 西门子（中国）有限公司 | Method for increasing group broadcasting service performance in mobile telcommunication system |
| CN101262626A (en) * | 2007-03-05 | 2008-09-10 | 大唐移动通信设备有限公司 | MBMS channel transmission method and system, network and terminal |
| CN101267591A (en) * | 2007-03-16 | 2008-09-17 | 大唐移动通信设备有限公司 | Method and device for identifying single-frequency network domain |
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