CN101938698A - Method and device for bearing transmission blocks of multicasting channels - Google Patents
Method and device for bearing transmission blocks of multicasting channels Download PDFInfo
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- CN101938698A CN101938698A CN2009100884209A CN200910088420A CN101938698A CN 101938698 A CN101938698 A CN 101938698A CN 2009100884209 A CN2009100884209 A CN 2009100884209A CN 200910088420 A CN200910088420 A CN 200910088420A CN 101938698 A CN101938698 A CN 101938698A
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Abstract
The invention discloses a method for bearing transmission blocks of multicasting channels, comprising the following steps of: bearing a plurality of transmission blocks (TB) of the same multicasting channel (MCH) in a subframe by using a physical resource block (PRB), an orthogonal frequency division multiplexing (OFDM) symbol, a subcarrier or a subcarrier cluster as a unit; or bearing the TBs of different MCHs in one subframe by using the PRB, the OFDM symbol, the subcarrier or the subcarrier cluster as the unit. The invention simultaneously discloses a device for bearing the transmission blocks of multicasting channels in the subframe, comprising a bearing unit for bearing a plurality of TBs of the same MCH in the subframe by using the PRB, the OFDM symbol, the subcarrier or the subcarrier cluster as the unit or bearing the TBs of different MCHs in one subframe by using the PRB, the OFDM symbol, the subcarrier or the subcarrier cluster as the unit. The invention maximizes the utilization rate of a subframe resource, thereby improving the frequency-spectrum efficiency of a system.
Description
Technical field
The present invention relates to Multicast Channel (MCH, Multicast Channel) transmission block (TB in, Transport Block) bearing technology in subframe, relate in particular to a kind of Long Term Evolution (LTE, Long Term Evolution) bearing method and the device of Multicast Channel transmission block in multicast broadcast single frequency network (MBSFN, Multicast/Broadcast over Single Frequency Network) subframe in the system.
Background technology
Along with the fast development of Internet and popularizing of large-screen multi-functional mobile phone, a large amount of mobile data multimedia services and various high bandwidth multimedia service have appearred, for example, video conference, television broadcasting, video request program, advertisement, online education, interactive game etc., this has satisfied the business demand that the mobile subscriber constantly rises on the one hand, also brings new business growth point for mobile operator simultaneously.These mobile data multimedia services require a plurality of users can receive identical data simultaneously, compare with general data service, have characteristics such as data volume is big, longer duration, delay sensitive.
In order to effectively utilize mobile network resource, third generation partner program (3GPP, 3rd Generation Partnership Project) the MBMS business has been proposed, this business is a kind of technology that transmits data from a data source to a plurality of targets, realize sharing of Internet resources, improved utilization rate of network resource.The MBMS of 3GPP definition not only can realize the classes of messages multicast and the broadcasting of plain text low rate, but also can realize the broadcasting and the multicast of high-speed multimedia business, multiple rich video, audio frequency and multimedia service are provided, this has complied with the trend of following mobile data development undoubtedly, for the development of 3G provides better professional prospect.
In the LTE system, the MBMS business can adopt the mixed carrier mode to send, and the mixed carrier mode is meant that the mode that unicast service (Unicast) and multicast service (MBMS business) carried with the time-division sends on same carrier wave, and the time-division least unit of carrying is a subframe.Stipulate among the LTE at present, use the dual unit method to dispose the radio frames and the subframe of carrying MBMS business, specifically describe as follows:
The first order realizes the radio frames configuration of carrying MBMS, the equation SFN mod radioFrameAllocationPeriod=radioFrameAllocationOffset below satisfying.Wherein, SFN is the abbreviation of System Frame Number System Frame Number, and promptly the radio frames of system is numbered, from 0 to 1023.RadioFrameAllocationPeriod represents the MBSFN wireless frame period, its can get 1,2,4,8,16, and among the 32} any one.RadioFrameAllocationOffset represents the skew of MBSFN radio frames, and its value is an integer and less than the numerical value of selected MBSFN wireless frame period, more than or equal to 0.Mod represents that SFN is to radioFrameAllocationPeriod delivery or complementation.Above-mentioned be configured to carry the MBMS radio frames and be called the MBSFN radio frames.
The second level is realized concrete which the subframe carrying MBMS business in the carrying MBMS radio frames, use the method for bitmap, owing to stipulate Frequency Division Duplexing (FDD) (FDD among the LTE, Frequency Division Duplex) subframe #0, #4, #5, #9 can not carry the MBMS business under the pattern, time division duplex (TDD, Time Division Duplex) subframe #0, #1, #5, #6 can not carry the MBMS business under the pattern, so use the bitmap of 6 bits to describe which carrying MBMS business of remaining 6 subframes.The sub-frame configuration of the carrying MBMS business in each MBSFN radio frames is identical.Because the dual unit configuration signal sends to user terminal on BCCH, so the sub-frame configuration in the MBSFN radio frames in each Broadcast Control Channel (BCCH, Broadcast Control Channel) modification cycle can not change.The subframe of carrying MBMS business is called the MBSFN subframe in the above-mentioned MBSFN radio frames, also claims multicast subframe.
In the present LTE system, preceding 1 or 2 orthogonal frequency carrying (OFDM of MBSFN subframe, Orthogonal Frequency Division Multiplexing) symbol is used to transmit the professional control information of clean culture (Unicast), be also referred to as Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel), in this subframe residual resource to be used for sending MBMS professional or other are professional.
Can realize the configuration of MBSFN radio frames and MBSFN subframe by the method for above-mentioned existing dual unit, the MBSFN subframe that configures is exactly the physical resource that has constituted actual transmissions MBMS business, be Physical Multicast Channel (PMCH, Physical Multicast Channel).PMCH carrying multicast transmission channel (MCH, Multicast Channel) channel.MCH is made of a series of MBSFN subframes that the collocation method by dual unit disposes.At present do not get rid of MCH in the LTE system and can be divided into a plurality of MCH by certain rule.For example by the part MBSFN subframe in the MBSFN subframe of dual unit configuration as MCH1, remaining MBSFN subframe as MCH2.
At present, for multiplexing in subframe how of the data among the TB in the same MCH, whether the data of different MCH can be multiplexing in a subframe, and, can the data that belong to the MCH in different MBS FN zone in the MBSFN overlapping region multiplexing etc. subframe, and present technical scheme does not all have foregoing and relates to.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of bearing method and device of Multicast Channel transmission block, and the data among the MCH are carried in the subframe of LTE system better, and the sub-frame resources of LTE system is fully utilized.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of bearing method of Multicast Channel transmission block comprises:
A plurality of transmission block TB of same Multicast Channel MCH carry in a subframe;
Perhaps, the TB of different MCH carries in a subframe.
Preferably, the TB of a plurality of TB of same MCH or different MCH is that unit carries in a subframe with Physical Resource Block PRB or with orthogonal frequency carrying OFDM symbol or with subcarrier or with the cluster of subcarriers.
Preferably, described PRB is made of six continuous OFDM symbols and 12 physically continuous or discrete subcarriers; Perhaps, described PRB is made of 12 continuous OFDM symbols and 12 physically continuous or discrete subcarriers.
Preferably, described cluster of subcarriers is made of 12 or 12 an integral multiple physically continuous or discrete subcarrier.
Preferably, described subframe is multicast broadcast single frequency network MBSFN subframe or unicast sub.
Preferably, described different MCH belongs to same MBSFN zone or belongs to different MBSFN zones.
A kind of bogey of Multicast Channel transmission block comprises:
Load bearing unit is used for a plurality of TB of same MCH are carried in the subframe; Perhaps, the TB with different MCH is carried in the subframe.
Preferably, described load bearing unit is that unit is carried on a plurality of TB of same MCH or the TB of different MCH in the subframe with PRB or with the OFDM symbol or with subcarrier or with the cluster of subcarriers.
Preferably, described PRB is made of six continuous OFDM symbols and 12 physically continuous or discrete subcarriers; Perhaps, described PRB is made of 12 continuous OFDM symbols and 12 physically continuous or discrete subcarriers.
Preferably, described cluster of subcarriers is made of 12 or 12 an integral multiple physically continuous or discrete subcarrier.
Preferably, described subframe is MBSFN subframe or unicast sub.
Preferably, described different MCH belongs to same MBSFN zone or belongs to different MBSFN zones.
Among the present invention, a TB piece will no longer take whole sub-frame resources among the MCH, but take the resource of a subframe jointly with other TB piece, these other TB belongs to same MCH or belongs to different MCH with aforementioned TB, like this, and in the TB of MCH data volume when not being king-sized, data can be shared a sub-frame resources among the different TB, the present invention makes the carrying of sub-frame resources more flexible, can make the utilance maximization of resource in system's subframe, thereby has promoted the spectrum efficiency of system.
Description of drawings
Fig. 1 is the schematic diagram that two MBSFN region overlappings cover.
Embodiment
Basic thought of the present invention is: a plurality of TB that belong to the same MCH in same MBSFN zone can be carried in the same subframe, perhaps, the TB that belongs to the different MCH in same MBSFN zone can be carried in the same subframe, perhaps, the TB that belongs to the MCH in different MBS FN zone can be carried in the same subframe, and the unit of carrying TB can be Physical Resource Block (PRB, Physical Resource Block), or OFDM symbol, or subcarrier or cluster of subcarriers; Like this, a TB piece will no longer take whole sub-frame resources among the MCH, but take the resource of a subframe jointly with other TB piece, these other TB belongs to same MCH or belongs to different MCH with aforementioned TB, like this, and in the TB of MCH data volume when not being king-sized, data can be shared a sub-frame resources among the different TB, the present invention makes the carrying of sub-frame resources more flexible, can make the utilance maximization of resource in system's subframe, thereby has promoted the spectrum efficiency of system.
For making the purpose, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.
Be introduced according to the background of the prior art after 66 meetings of LTE RAN2, clearly adopt MCH in the LTE system at present, and the TB of a MCH fills full system's subframe as embodiment.Because hypothesis has only a MCH in the LTE system at present, whether need to dispose a plurality of MCH and also have the need for further discussion, all supposing in the embodiments of the invention to have a plurality of MCH.And the MBSFN zone is meant by some community associated and constitutes a zone that is used for sending in the MBSFN mode MBMS.LTER9 does not allow the MBSFN region overlapping to cover at present, does not promptly allow a sub-district to belong to two or more MBSFN zone simultaneously.
The TB of regulation MCH can only be carried on the MBSFN subframe among the LTE at present, it is example that the following examples also are carried on the MBSFN subframe with the TB of MCH, but, the mode that is carried to unicast sub for the TB of MCH is identical with the mode that the TB of MCH is carried to the MBSFN subframe, just carries the subframe type difference of data.
Embodiment one
The a plurality of TB that belong to the same MCH in same MBSFN zone can share in the same subframe, be that different TB among the MCH can be carried in the same subframe, concrete, a plurality of TB of MCH are that unit is carried in the same subframe with PRB or with the OFDM symbol or with subcarrier or with the cluster of subcarriers.The subframe here can be unicast sub (Unicast subframe), perhaps multicast subframe (MBSFN subframe).
Among the present invention, PRB is made of six continuous OFDM symbols and 12 physically continuous or discrete subcarriers, and is promptly identical with PRB in the existing LTE system.Perhaps, PRB is made of 12 continuous OFDM symbols and 12 physically continuous or discrete subcarriers, at this moment, has redefined the size of PRB.Cluster of subcarriers is made of 12 or 12 an integral multiple physically continuous or discrete subcarrier.Because the structure of OFDM symbol, subcarrier, PRB and cluster of subcarriers determines that the present invention no longer illustrates its concrete structure.
This example is intended to illustrate that a plurality of TB of the same MCH in same MBSFN zone can be multiplexing in a subframe.What the present invention is directed to is the situation that the TB of MCH can not fill up all the MBSFN resources in the MBSFN subframe, if allow different TB multiplexing in a subframe, the processing layer that helps so more on the physical layer carries out flexible processing to packet, make that the system resource scheduling is more flexible, help user terminal and only handle own interested data, thereby make more power saving of user terminal.Concrete operations are as being: in order to allow user terminal only handle own interested business datum, the upper strata can be the different logic channel (MTCH that belongs to this MCH, MBMS Traffic Channel) or different business datum independent groups bags, wait these packets to be mapped to the just corresponding TB that is called after the physical layer like this, only comprise the data of a MTCH or a business this moment among the TB, a plurality of TB that form for MCH this moment, distribute several PRB respectively, the OFDM symbol, subcarrier or cluster of subcarriers are used to carry each TB, and a plurality of like this TB have just realized sharing a subframe.User's receiving end just can only be monitored PRB, OFDM symbol, subcarrier or the cluster of subcarriers at own interested business datum place like this.
The data map among the TB of MCH in PRB, OFDM symbol, subcarrier or cluster of subcarriers the time, because the part resource in some PRB, OFDM symbol, subcarrier or the cluster of subcarriers is shared by important system information, therefore need to avoid these resources that taken by system information this moment.
Embodiment two
The TB that belongs to the different MCH in same MBSFN zone can share same subframe, and the TB of MCH is that unit is carried in the subframe with PRB, OFDM symbol, subcarrier or cluster of subcarriers; The subframe here can be unicast sub or MBSFN subframe.
Among the present invention, PRB is made of six continuous OFDM symbols and 12 physically continuous or discrete subcarriers, and is promptly identical with PRB in the existing LTE system.Perhaps, PRB is made of 12 continuous OFDM symbols and 12 physically continuous or discrete subcarriers, at this moment, has redefined the size of PRB.Cluster of subcarriers is made of 12 or 12 an integral multiple physically continuous or discrete subcarrier.Because the structure of OFDM symbol, subcarrier, PRB and cluster of subcarriers determines that the present invention no longer illustrates its concrete structure.
Here supposing has a plurality of MCH transmission channels in a certain MBSFN zone, might as well be assumed to be MCH1 and MCH2.Here the TB that can form MCH1 and MCH2 respectively, can distribute same subframe for a plurality of TB that belong to MCH1 and MCH2, and in this subframe, distribute several PRB respectively, OFDM symbol, subcarrier or cluster of subcarriers be in order to a plurality of TB of carrying MCH1 and MCH2.
It is less that MCH1 and MCH2 share the application scenarios of a subframe, the TB that is mainly used in MCH1 and MCH2 all hour, in the time of can not filling full subframe respectively, in order to reduce waste, and a kind of multiplex mode that uses to sub-frame resources.
The data map among the TB in PRB, OFDM symbol, subcarrier or cluster of subcarriers the time, because the part resource in some PRB, OFDM symbol, subcarrier or the cluster of subcarriers is taken by important system information, therefore need to avoid these resources that taken by system information this moment.
Embodiment three
The different MCH that belongs to different MBS FN zone can share same subframe, and perhaps the TB of different MCH can share same subframe, the unit of TB of carrying MCH can be PRB, OFDM symbol,, subcarrier or cluster of subcarriers; The subframe here can be unicast sub (Unicast subframes), perhaps multicast subframe.
Among the present invention, PRB is made of six continuous OFDM symbols and 12 physically continuous or discrete subcarriers, and is promptly identical with PRB in the existing LTE system.Perhaps, PRB is made of 12 continuous OFDM symbols and 12 physically continuous or discrete subcarriers, at this moment, has redefined the size of PRB.Cluster of subcarriers is made of 12 or 12 an integral multiple physically continuous or discrete subcarrier.Because the structure of OFDM symbol, subcarrier, PRB and cluster of subcarriers determines that the present invention no longer illustrates its concrete structure.
This example at situation mainly be under the situation that the MBSFN region overlapping covers, Fig. 1 is the schematic diagram that two MBSFN region overlappings cover, as shown in Figure 1, the public domain of two circles is two MBSFN region overlapping overlay area A among the figure, at this moment, there are several sub-districts to belong to this two MBSFN zones simultaneously among the overlapping covered A, this moment, all there was the MCH of oneself in each MBSFN zone, here might as well suppose these two different MBSFN zones, there are MCH_area1 and MCH_area2 to belong to this two different MBS FN zones respectively respectively, several sub-districts in the A of overlapping region are covered simultaneously by these two MBSFN zones, and the sub-district of so regional A just has two different transmission channels of MCH_area1 and MCH_area2.
According to technical scheme of the present invention, allow MCH_area1 and MCH_area2 to share same subframe, for several sub-districts in the regional A, because there are MCH_area1 and MCH_area2 in each sub-district, can be MCH_area1 and MCH_area2 that base unit is multiplexing in same subframe with PRB, OFDM symbol, subcarrier or cluster of subcarriers at this moment by the scheduling configuration.The subframe of selecting when multiplexing belongs to that MBSFN zone, limit here, can be selected arbitrarily by system side, selects the back need inform that user terminal gets final product.
The bogey of Multicast Channel transmission block of the present invention in subframe comprises load bearing unit, and a plurality of TB that are used for same MCH are that unit is carried in the subframe with PRB or with the OFDM symbol or with subcarrier or with the cluster of subcarriers; Perhaps, the TB with different MCH is that unit is carried in the subframe with PRB or with the OFDM symbol or with subcarrier or with the cluster of subcarriers.Wherein, described PRB is made of six continuous OFDM symbols and 12 physically continuous or discrete subcarriers; Perhaps, described PRB is made of 12 continuous OFDM symbols and 12 physically continuous or discrete subcarriers.Described cluster of subcarriers is made of 12 or 12 an integral multiple physically continuous or discrete subcarrier.
The realization function that it will be appreciated by those skilled in the art that the load bearing unit in the bogey of Multicast Channel transmission block of the present invention in subframe can be understood with reference to the associated description among the embodiment one to embodiment three.The function of load bearing unit can realize by the program that runs on the processor in the bogey of Multicast Channel transmission block of the present invention in subframe, also can realize by concrete logical circuit.
" TB of different MCH carries in a subframe " among the present invention also is fit to the transmission of MCCH (the Multicast Control Channel) information in the MBMS business, only need " TB of different MCH " among the present invention be replaced to " different MCCH information " and get final product, corresponding specific embodiment is also done replacement of equal value and can be implemented.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (12)
1. the bearing method of a Multicast Channel transmission block is characterized in that, comprising:
A plurality of transmission block TB of same Multicast Channel MCH carry in a subframe;
Perhaps, the TB of different MCH carries in a subframe.
2. method according to claim 1, it is characterized in that a plurality of TB of same MCH or the TB of different MCH are that unit carries with Physical Resource Block PRB or with orthogonal frequency carrying OFDM symbol or with subcarrier or with the cluster of subcarriers in a subframe.
3. method according to claim 1 and 2 is characterized in that, described PRB is made of six continuous OFDM symbols and 12 physically continuous or discrete subcarriers; Perhaps, described PRB is made of 12 continuous OFDM symbols and 12 physically continuous or discrete subcarriers.
4. method according to claim 1 and 2 is characterized in that, described cluster of subcarriers is made of 12 or 12 an integral multiple physically continuous or discrete subcarrier.
5. method according to claim 1 and 2 is characterized in that, described subframe is multicast broadcast single frequency network MBSFN subframe or unicast sub.
6. method according to claim 1 and 2 is characterized in that, described different MCH belong to same MBSFN zone or belong to different MBSFN zones.
7. the bogey of a Multicast Channel transmission block is characterized in that, comprising:
Load bearing unit is used for a plurality of TB of same MCH are carried in the subframe; Perhaps, the TB with different MCH is carried in the subframe.
8. device according to claim 7 is characterized in that, described load bearing unit is that unit is carried on a plurality of TB of same MCH or the TB of different MCH in the subframe with PRB or with the OFDM symbol or with subcarrier or with the cluster of subcarriers.
9. according to claim 7 or 8 described devices, it is characterized in that described PRB is made of six continuous OFDM symbols and 12 physically continuous or discrete subcarriers; Perhaps, described PRB is made of 12 continuous OFDM symbols and 12 physically continuous or discrete subcarriers.
10. according to claim 7 or 8 described devices, it is characterized in that described cluster of subcarriers is made of 12 or 12 an integral multiple physically continuous or discrete subcarrier.
11., it is characterized in that described subframe is MBSFN subframe or unicast sub according to claim 7 or 8 described devices.
12., it is characterized in that described different MCH belong to same MBSFN zone or belong to different MBSFN zones according to claim 7 or 8 described devices.
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Cited By (6)
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| CN102291684A (en) * | 2011-08-18 | 2011-12-21 | 西安交通大学 | Method for selecting unicast channel and multicast channel in multicast communication system |
| CN102291684B (en) * | 2011-08-18 | 2013-12-11 | 西安交通大学 | Method for selecting unicast channel and multicast channel in multicast communication system |
| WO2012149805A1 (en) * | 2011-10-14 | 2012-11-08 | 华为技术有限公司 | Method and system for improving multicast receiving gain |
| WO2019033915A1 (en) * | 2017-08-16 | 2019-02-21 | 中兴通讯股份有限公司 | Service scheduling method and device |
| CN109413590A (en) * | 2017-08-16 | 2019-03-01 | 中兴通讯股份有限公司 | Business scheduling method and device |
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