CN101686435A - MBMS transmission method, system and devices - Google Patents
MBMS transmission method, system and devices Download PDFInfo
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- CN101686435A CN101686435A CN200810223631A CN200810223631A CN101686435A CN 101686435 A CN101686435 A CN 101686435A CN 200810223631 A CN200810223631 A CN 200810223631A CN 200810223631 A CN200810223631 A CN 200810223631A CN 101686435 A CN101686435 A CN 101686435A
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Abstract
The present invention discloses an MBMS transmission method comprising steps that upstream and downstream communication between a base station and a terminal is in a time-division duplex mode, the base station sends MBMS services to the terminal from downstream service sub-frames; the base station receives the feedback information sent by the terminal from upstream servicer sub-frames, and the ratio of the upstream servicer sub-frames and the downstream service sub-frames is smaller than 1. The present invention also discloses an MBMS transmission system and devices. By adopting the technicalsolution of the invention, downstream multimedia broadcast services of high speed can be provided for subscribers, downstream resources of the system can be fully used, and resource waste because of idle downstream sub-frames can be avoided. Otherwise, an upstream feedback mechanism is introduced, the whole performance of the system can be improved, service types can be enriched, operation management becomes more convenient and the invention is beneficial to further optimization of system performances.
Description
Technical field
The present invention relates to moving communicating field, particularly, the present invention relates to the MBMS technical field of mobile communication.
Background technology
In order to effectively utilize the mobile communications network resource, 3GPP (3rd Generation PartnershipProject, third generation partner program) MBMS (the MultimediaBroadcast Multicast Service of mobile communications network has been proposed, multimedia broadcast-multicast service), thereby in mobile communications network, provide a data source to send the point-to-multipoint service of data to a plurality of users, the realization Internet resources are shared, improve utilization rate of network resource, the sharing of the interface resource of especially eating dishes without rice or wine.
The MBMS that 3GPP proposes can not only realize the classes of messages multicast and the broadcasting of plain text low rate, and can also realize the multicast and the broadcasting of high-speed multimedia business, and this has complied with the trend of following mobile data development undoubtedly.In order further to improve the transmission performance of MBMS, at the LTE of 3GPP (LongTerm Evolution, Long Term Evolution) in the system, the various situations of supporting the MBMS business are defined, for example, transmission method comprises mixed carrier transmission and special carrier transmission, in addition, the LTE system also supports Frequency Division Duplexing (FDD) and two kinds of duplex modes of time division duplex, and two kinds of dual-modes use different frame structures.For tdd systems, each radio frames is made of the long subframe of 10 1ms, and each subframe is numbered from 0～9 in order.As shown in table 1, be the transformat of the various configurations that system supported.
Table 1 uplink and downlink frame configuring condition
In table 1; " D " represents that this subframe is used for downlink transfer; " U " represents that this subframe is used for uplink; " S " represents special subframe, comprising: " DwPTS ", " GP "; " UpPTS " three zones; wherein DwPTS is used to transmit descending master sync signal and generic downlink business datum, and GP is the protection interval, and UpPTS takies 1～2 OFDM symbol transmission uplink random and inserts signal and uplink detection signal.
It is professional based on the unidirectional transmission of descending broadcast group broadcast that traditional MBMS business is generally, owing to do not possess feedback function, so transmitting terminal is not understood the concrete condition of receiving terminal usually.In addition, at the characteristics of mobile communication system self, when in some system, having a large amount of downlink resources, also exist the configuring condition of a spot of ascending resource.Therefore, be necessary to propose a kind of MBMS transmission mechanism with up feedback function.
Summary of the invention
The problem to be solved in the present invention is to propose a kind of MBMS transmission method, system and equipment, solves and can't realize the problem fed back in the MBMS business.
For achieving the above object, the invention discloses a kind of MBMS transmission method, can realize making full use of the downlink resource in the system, provide descending multi-media broadcasting service at a high speed to the user, can realize the up feedback of user terminal again, thereby improve the overall performance of system.
The invention discloses a kind of MBMS transmission method, may further comprise the steps:
Uplink and downlink communication between base station and the terminal is a TDD mode, and described base station sends the MBMS business in the downlink business subframe to described terminal;
Described base station receives the feedback information that described terminal sends in the uplink service subframe, and the ratio of wherein said uplink service subframe and downlink business subframe is less than 1.
According to embodiments of the invention, described base station sends the MBMS business to described terminal and comprises:
Described base station sends the MBMS business to described terminal on special carrier, all the downlink business subframes in the described special carrier are used for the MBMS transmission.
According to embodiments of the invention, described terminal sends feedback information to described base station on special carrier, and all the uplink service subframes in the described special carrier are used for transmitting feedback information.
According to embodiments of the invention, the ratio of up-downgoing service subframe comprises 1: 9.
According to embodiments of the invention, comprise synchronizing channel, MBMS control channel, MBMS paging channel and Random Access Channel in the described special carrier.
According to embodiments of the invention, described terminal is the feedack size as required, selects suitable uplink bandwidth resource to transmit transmission.
According to embodiments of the invention, described feedback information comprises the link circuit self-adapting feedback information.
According to embodiments of the invention, described link circuit self-adapting feedback information comprises channel quality information, re-transmission indication information and the pre-coding matrix information of the MBMS business that described terminal receives.
According to embodiments of the invention, described feedback information comprises managed operation information.
According to embodiments of the invention, described managed operation information comprises authentication information, customer satisfaction survey information and the charging statistical information of described terminal.
According to embodiments of the invention, described feedback information comprises the feedback information based on the MBMS business tine.
The invention also discloses a kind of MBMS transmission system, comprising:
The base station, described base station sends the MBMS business to terminal;
Terminal, described terminal receive the MBMS business that described base station sends, and send feedback information to described base station in up channel.
The invention also discloses a kind of MBMS transmission equipment, comprising:
Configuration module, described configuration module are used to select suitable transmission parameter, send described MBMS business and the feedback information that receives described terminal on described carrier resource on described carrier resource;
Sending module, described sending module are used for sending the MBMS business to terminal;
Receiver module, described receiver module is used to receive the feedback information of described terminal.
According to embodiments of the invention, described configuration module comprises:
The downlink transfer configuration module, described downlink transfer configuration module is used for according to system parameters, selects to send the transmission parameter of MBMS business;
Up feedback configuration module, described up feedback configuration module is used for according to system parameters, selects described terminal to send needed transmission parameter of feedback information and feedback information type.
According to embodiments of the invention, the transmission parameter that described downlink transfer configuration module is selected to send the MBMS business comprises: the subcarrier spacing of descending MBMS transmission.
According to embodiments of the invention, described transmission parameter comprises conventional CP or expansion CP, and the feedback information type comprises the link circuit self-adapting feedback information, managed operation information and based on the feedback information of MBMS business tine.
Because at present traditional MBMS transmission is generally unidirectional broadcast group broadcast and sends business, lacks feedback mechanism, the present invention has proposed a kind of MBMS transmission method, system and equipment with feedback mechanism according to the characteristics of mobile communication system self.Technical scheme of the present invention has the following advantages, and both can provide descending multi-media broadcasting service at a high speed to the user, has also made full use of the downlink resource in the system, avoids the wasting of resources that causes owing to the descending sub frame free time.In addition, introduce upstream feedback mechanism, can also improve overall performance, the abundant business type of system,, help further optimization system performance simultaneously for operation management brings convenience.
Description of drawings
Fig. 1 is a MBMS transmission method flow chart;
Fig. 2 is the physical resource schematic diagram with MBMS transmission of feedback;
Fig. 3 is the reference symbol mapping structure that descending MBMS transmission is used;
Fig. 4 is the reference symbol mapping structure that up feedback is used;
Fig. 5 is the illustrative view of functional configuration of MBMS transmission equipment.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail:
MBMS transmission method disclosed by the invention may further comprise the steps:
The base station sends the MBMS business to terminal; Described base station receives the feedback information that described terminal sends.
As shown in Figure 1, for realizing the flow chart of MBMS transmission method of the present invention.
S101, the base station sends the MBMS business.
The principal character of MBMS business is that data volume is big, real-time, wide coverage etc.As embodiments of the invention, describe the present invention for example in detail with the MBMS business in the LTE system below.In the LTE system, always be to use expansion CP (Cycle Prefix, Cyclic Prefix) when carrying out the MBMS transmission, and transmission bandwidth takes whole frequency band.The LTE system supports two kinds of MBMS transmission methods: mixed carrier transmission and special carrier transmission.During the mixed carrier transmission, have MBMS and non-MBMS/unicast business simultaneously on a certain time-frequency band, this moment, subcarrier spacing was 15kHz; During the special carrier transmission, then only have the MBMS business on a certain time-frequency band, this moment, subcarrier spacing was 7.5kHz.
As embodiments of the invention, described base station sends the uplink transmission resource of information to the downlink transfer resource of terminal transmits information to described base station greater than described terminal.Exist a large amount of downlink resource in the system this moment, also exists the configuring condition of a spot of ascending resource.Therefore, utilize a spot of ascending resource can realize having the MBMS transmission mechanism of up feedback function.
As embodiments of the invention, the uplink and downlink communication between base station and the terminal is a TDD mode, and described base station sends the MBMS business in the downlink business subframe to terminal; The feedback information that the base station sends at uplink service subframe receiving terminal, wherein the ratio of uplink service subframe and downlink business subframe is less than 1.Wherein the ratio situation of uplink service subframe and downlink business subframe can also be the various situations shown in the table 1.Preferably, the ratio value of up-downgoing service subframe is 1: 9, and with this understanding, all downlink business subframes are used for the MBMS transmission.
As embodiments of the invention, the base station sends the MBMS business to terminal on special carrier, and all downlink business subframes of special carrier are used for the MBMS transmission.
Correspondingly, terminal sends feedback information to the base station on special carrier, and all the uplink service subframes in the special carrier are used for transmitting feedback information.
In the above-described embodiments, this system can work independently and not need other carrier waves to cooperate, promptly in the special carrier frequency range, comprise: synchronizing channel, MBMS control channel, MBMS paging channel, Random Access Channel etc., each channel can adopt the mode of the definition of existing standard to carry out work, but also otherwise designed.
As embodiments of the invention, the up feedback of terminal can be used and be less than or equal to descending MBMS and transmit employed bandwidth resources.When up feedback bandwidth during less than descending MBMS transmission bandwidth, the remaining frequencies resource can be used by other system in the uplink service subframe.Preferably, terminal is the feedack size as required, selects suitable uplink bandwidth resource to transmit transmission.
As shown in table 1, the LTE system supports the MBMS transmission under the various modes at present.Be not prevailingly, with configuration 5 wherein, i.e. up-downgoing ratio is 1: 9 o'clock, illustrates.As shown in Figure 2, the physical resource schematic diagram that transmits for MBMS with feedback.Wherein, system bandwidth is BMHz, the wide MBMS transmission business of filled band always in all downlink business subframes, and up feedback subframe takies B
ULThe MHz bandwidth is transmitted, wherein B
UL＜B, the bandwidth that promptly up feedback takies is transmitted employed bandwidth less than descending MBMS.
Preferably, in this system, auxiliary synchronization channel takies in subframe 0 and the subframe 5 the middle 1.4M frequency range of last OFDM symbol and transmits, and other surplus resources on this symbol no longer carry the MBMS business.1.4M transmitted in the middle of master sync signal took in subframe 1 and the subframe 6 the 3rd OFDM symbol, and other resources on this symbol are no longer carried the MBMS business.MBMS control channel and paging channel fixed placement are transmitted in DwPTS.Random Access Channel is placed in the UpPTS to be transmitted.
It is 7.5kHz that descending MBMS transmits its subcarrier spacing, uses reference symbol structure shown in Figure 3 to shine upon.The uplink subcarrier spacing is 15kHz, for conventional CP and expansion CP, uses reference symbol structure shown in Figure 4 to shine upon, wherein R
4When transmitting for MBMS, receiving terminal carries out the employed reference symbol of channel estimating, i.e. frequency pilot sign.
S102, the feedback information of base station receiving terminal.
After terminal receives the MBMS business, be chosen in feedback information in the suitable uplink bandwidth resource that system is required and send to the base station, the base station is receiving feedback information in corresponding up-link carrier.For example, by the Resource Block partly of the U among Fig. 2.
As embodiments of the invention, the feedback information of terminal comprises:
The feedback information that is used for link circuit self-adapting, for example: the channel quality information of the required use of Adaptive Modulation and Coding, HARQ (Hybrid Automatic Repeat reQuest, mixed automatic repeat request) retransmit indication information and pre-coding matrix information etc.;
Based on the feedback information of MBMS business tine, for example: user's ballot, user's message etc.;
The needed feedback information of operation management, for example: authentication information, customer satisfaction survey information and charging statistical information etc.
The present invention also provides a kind of MBMS transmission system, comprising:
The base station, described base station sends the MBMS business to terminal; Terminal, described terminal receive the MBMS business that described base station sends, and send feedback information to described base station in up channel.
As shown in Figure 5, the invention also discloses a kind of MBMS transmission equipment 500, comprising:
Sending module 510, sending module 510 are used for sending the MBMS business to terminal 600;
As the embodiment of the said equipment, configuration module 520 comprises:
Downlink transfer configuration module 521, downlink transfer configuration module 521 is used for according to system parameters, selects to send the transmission parameter of MBMS business;
Up feedback configuration module 522, up feedback configuration module 522 is used for according to system parameters, selects terminal 600 to send needed transmission parameter of feedback information and feedback information type.
Wherein, system parameters comprises the uplink and downlink frame transformat that example is as shown in table 1, comprises the duplex mode of system works, comprises that also system needs the various information of terminal feedback, comprises that terminal sends the needed transmission parameter of feedback information etc.
As embodiments of the invention, the transmission parameter that downlink transfer configuration module 521 is selected to send the MBMS business comprises: the subcarrier spacing of descending MBMS transmission.
As embodiments of the invention, up feedback configuration module 522 selects the needed transmission parameter of terminal 600 transmissions to comprise: conventional CP or expansion CP, the feedback information type comprises the link circuit self-adapting feedback information, managed operation information and based on the feedback information of MBMS business tine.
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 improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (16)
1, a kind of multimedia broadcast-multicast service MBMS transmission method is characterized in that, may further comprise the steps:
Uplink and downlink communication between base station and the terminal is a TDD mode, and described base station sends the MBMS business in the downlink business subframe to described terminal;
Described base station receives the feedback information that described terminal sends in the uplink service subframe, and the ratio of wherein said uplink service subframe and downlink business subframe is less than 1.
2, MBMS transmission method as claimed in claim 1 is characterized in that, described base station sends the MBMS business to described terminal and comprises:
Described base station sends the MBMS business to described terminal on special carrier, all the downlink business subframes in the described special carrier are used for the MBMS transmission.
3, MBMS transmission method as claimed in claim 2 is characterized in that, described terminal sends feedback information to described base station on special carrier, and all the uplink service subframes in the described special carrier are used for transmitting feedback information.
4, MBMS transmission method as claimed in claim 2 is characterized in that, the ratio of up-downgoing service subframe comprises 1: 9.
5, MBMS transmission method as claimed in claim 2 is characterized in that, comprises synchronizing channel, MBMS control channel, MBMS paging channel and Random Access Channel in the described special carrier.
6, MBMS transmission method as claimed in claim 2 is characterized in that, described terminal is the feedack size as required, selects suitable uplink bandwidth resource to transmit transmission.
7, MBMS transmission method as claimed in claim 1 is characterized in that, described feedback information comprises the link circuit self-adapting feedback information.
8, MBMS transmission method as claimed in claim 7 is characterized in that, described link circuit self-adapting feedback information comprises channel quality information, re-transmission indication information and the pre-coding matrix information of the MBMS business that described terminal receives.
9, MBMS transmission method as claimed in claim 1 is characterized in that, described feedback information comprises managed operation information.
10, MBMS transmission method as claimed in claim 9 is characterized in that, described managed operation information comprises authentication information, customer satisfaction survey information and the charging statistical information of described terminal.
11, MBMS transmission method as claimed in claim 1 is characterized in that, described feedback information comprises the feedback information based on the MBMS business tine.
12, a kind of MBMS transmission system is characterized in that, comprising:
The base station, described base station sends the MBMS business to terminal;
Terminal, described terminal receive the MBMS business that described base station sends, and send feedback information to described base station in up channel.
13, a kind of MBMS transmission equipment is characterized in that, comprising:
Configuration module, described configuration module are used to select suitable transmission parameter, send described MBMS business and the feedback information that receives described terminal on described carrier resource on described carrier resource;
Sending module, described sending module are used for sending the MBMS business to terminal;
Receiver module, described receiver module is used to receive the feedback information of described terminal.
14, MBMS transmission equipment as claimed in claim 13 is characterized in that, described configuration module comprises:
The downlink transfer configuration module, described downlink transfer configuration module is used for according to system parameters, selects to send the transmission parameter of MBMS business;
Up feedback configuration module, described up feedback configuration module is used for according to system parameters, selects described terminal to send needed transmission parameter of feedback information and feedback information type.
15, MBMS transmission equipment as claimed in claim 14 is characterized in that, the transmission parameter that described downlink transfer configuration module is selected to send the MBMS business comprises: the subcarrier spacing of descending MBMS transmission.
16, MBMS transmission equipment as claimed in claim 14 is characterized in that, described transmission parameter comprises conventional CP or expansion CP, and the feedback information type comprises the link circuit self-adapting feedback information, managed operation information and based on the feedback information of MBMS business tine.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810223631A CN101686435A (en) | 2008-09-28 | 2008-09-28 | MBMS transmission method, system and devices |
| PCT/CN2009/074080 WO2010034233A1 (en) | 2008-09-28 | 2009-09-21 | Method, system and device for transmitting multimedia broadcast multicast service |
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| CN200810223631A CN101686435A (en) | 2008-09-28 | 2008-09-28 | MBMS transmission method, system and devices |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014110827A1 (en) * | 2013-01-21 | 2014-07-24 | 华为技术有限公司 | Uplink feedback method, user equipment, and base station |
| CN107231220A (en) * | 2016-03-25 | 2017-10-03 | 北京信威通信技术股份有限公司 | Method for transmission processing and device |
| CN112671525A (en) * | 2016-11-04 | 2021-04-16 | Oppo广东移动通信有限公司 | Data transmission method, terminal equipment and network equipment |
| WO2022021811A1 (en) * | 2020-07-31 | 2022-02-03 | Oppo广东移动通信有限公司 | Wireless communication method, terminal device and network device |
-
2008
- 2008-09-28 CN CN200810223631A patent/CN101686435A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014110827A1 (en) * | 2013-01-21 | 2014-07-24 | 华为技术有限公司 | Uplink feedback method, user equipment, and base station |
| US9735924B2 (en) | 2013-01-21 | 2017-08-15 | Huawei Technologies Co., Ltd. | Uplink feedback method, user equipment, and base station |
| US10320525B2 (en) | 2013-01-21 | 2019-06-11 | Huawei Technologies Co., Ltd. | Uplink feedback method, user equipment, and base station |
| US10972221B2 (en) | 2013-01-21 | 2021-04-06 | Huawei Technologies Co., Ltd. | Uplink feedback method, user equipment, and base station |
| CN107231220A (en) * | 2016-03-25 | 2017-10-03 | 北京信威通信技术股份有限公司 | Method for transmission processing and device |
| CN112671525A (en) * | 2016-11-04 | 2021-04-16 | Oppo广东移动通信有限公司 | Data transmission method, terminal equipment and network equipment |
| WO2022021811A1 (en) * | 2020-07-31 | 2022-02-03 | Oppo广东移动通信有限公司 | Wireless communication method, terminal device and network device |
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