CN101466071B - Method and apparatus for distributing time frequency resource - Google Patents
Method and apparatus for distributing time frequency resource Download PDFInfo
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- CN101466071B CN101466071B CN2007101984898A CN200710198489A CN101466071B CN 101466071 B CN101466071 B CN 101466071B CN 2007101984898 A CN2007101984898 A CN 2007101984898A CN 200710198489 A CN200710198489 A CN 200710198489A CN 101466071 B CN101466071 B CN 101466071B
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- 230000005540 biological transmission Effects 0.000 claims description 25
- 238000013468 resource allocation Methods 0.000 claims description 23
- 230000008878 coupling Effects 0.000 claims description 15
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Abstract
The embodiment of the invention discloses a time-frequency resource allocating method used for a multicast service of media broadcasting. The method comprises the following steps: an MBSFN (multicast broadcasting single frequency network) area is matched with each adjacent area in a gathering way; the adjacent areas which satisfy the preset matching requirements are selected to allocate the time-frequency resources of the MBSFN area in a gathering way. The embodiment of the invention further discloses a time-frequency resource allocating equipment. By utilizing the embodiment of the invention, the MBSFN area is matched with the adjacent areas in a gathering way and the resources are allocated according to the matching condition, thus leading more small areas to use the same time-frequency resources, increasing the gains of the combination of the small areas, and avoiding the contradiction that remains of the time-frequency resources are incurred in the random allocation, but no resources can be allocated at present.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of distribution method and device of running time-frequency resource.
Background technology
MBMS (Multimedia Broadcast and Multicast Service, multimedia broadcast-multicast service) is meant that a data source sends the point-to-multipoint service of data to a plurality of users, can realize that Internet resources are shared, comprise that mobile core network and access network resource are shared, especially interface-free resources is shared.3GPP (the 3rdGeneration Partner Project, third generation partner program) Ding Yi MBMS can not only realize the classes of messages multicast and the broadcasting of plain text low rate, and can realize the multimedia service multicast and the broadcasting of two-forty, complied with the trend of following mobile data development.
According to the distribution situation that receives professional user, MBMS has two kinds of transmission meanss, and a kind of is many cell transmission, and a kind of is single cell transmission.
Many cell transmission are MBSFN (Multicast Broadcast Single Frequency Network, multicast broadcast single frequency network) transmission, just with net transmission frequently.During many cell transmission in the common-frequency network each transmitter at the identical MBMS service signal of identical frequency synchronized transmission, the MBSFN district (promptly adopts same frequency to transmit the set of all sub-districts of a certain business, when having only in the MBSFN district all sub-districts that publicly available time-frequency is arranged, could successful Resources allocation, transport service) interior user receives is a plurality of stacks that transmit, transmit in order to be one to the signal equivalence that receives from each transmitter, professional in the MBSFN district must synchronous transmission, and support the merging of many cell transmission.
MCE (MBMS Coordination Entity, MBMS coordination entity) is newly-increased among the LTE MBMS (LongTerm Evolution MBMS, a Long Term Evolution multimedia broadcast-multicast service) functional entity, is responsible for coordinating the transmission of MBSFN.When a professional MBSFN of employing transmitted, MCE was responsible for the same running time-frequency resource transmission of all cell allocation data in the MBSFN district.The running time-frequency resource that MCE is responsible for distributing has two dimensions, and one is the running time-frequency resource dimension, and one is sub-district, space dimension.From the running time-frequency resource dimension, the result of same set of cells adjacent area subset division in the frequency range when different is different.The adjacent area subclass is defined as: select some sub-districts at random from set of cells (set of several sub-districts), find out the adjacent area on the identical time-frequency in this sub-district in set of cells, and constitute a subclass sub-district jointly with this sub-district; In set of cells, find out the adjacent area of this subclass sub-district, and constitute new subclass sub-district jointly with this subclass sub-district; And the like, till the adjacent area that in set of cells, can not find this subclass sub-district, obtain an adjacent area subclass.Repeat according to the method described above, all sub-districts in set of cells are all selected.A set of cells is made up of several adjacent area subclass, the adjacent area subclass sub-district of not occuring simultaneously each other, and each adjacent area subclass comprises the sub-district of some, as shown in Figure 1.Each the time sub-district in the adjacent area subclass on the frequency range spatially adjacent, and should the time frequency range be the public available running time-frequency resource of all sub-districts in this adjacent area subclass, as shown in Figure 2.
The inventor finds to exist at least in the background technology following problem in existing the invention process:
When this running time-frequency resource of certain sub-district in the MBSFN district has been used, just can not re-use this running time-frequency resource and be this cell transmission current business, then cause the time-frequency resource allocating failure.Therefore in the background technology, MCE is when carrying out time-frequency resource allocating, and to standard of selection shortage of running time-frequency resource, the success rate of time-frequency resource allocating is not high, and when running into the resource allocation failure scenarios, MCE does not distribute the method for running time-frequency resource once more.When supposing to adopt the Random assignment method, MCE then selects the total running time-frequency resource in MBSFN district to distribute at random, when the sub-district in certain MBSFN district does not have common source, and the failure of MCE Resources allocation, resources left and the contradiction that can't distribute can occur, the professional transmission is difficult to carry out.
Summary of the invention
The embodiment of the invention provides a kind of distribution method and device of running time-frequency resource, solving under many cell transmission pattern, MCE when resource allocation is selected, do not have standard can according to and the time-frequency resource allocating problem of how to carry out sub-distribution again when failing.
For achieving the above object, the embodiment of the invention provides a kind of distribution method of time frequency resources, is used for the media broadcast multicast service, may further comprise the steps:
Multicast broadcast single frequency network MBSFN district and the set of each adjacent area are mated;
Adjacent area set the carrying out distribution of described MBSFN district running time-frequency resource of preset matching requirements is satisfied in selection;
The wherein said set of multicast broadcast single frequency network MBSFN district and each adjacent area is mated, comprise:
With the space set of cells is divided into different adjacent area set according to time-frequency;
Running time-frequency resource according to described MBSFN district will distribute mates described MBSFN district and described each adjacent area set;
Obtain the number of cells that comprises in the number of cells of the set of described each adjacent area and described MBSFN district mating and the described MBSFN district relation between the two.
The embodiment of the invention also provides a kind of time-frequency resource allocating equipment, and the time-frequency that is used under many cell transmission pattern distributes, and comprising:
Matching unit is used for MBSFN district and the set of each adjacent area are mated;
The time-frequency allocation units are used to select to satisfy adjacent area set the carrying out distribution of described MBSFN district running time-frequency resource of preset matching requirements;
Wherein said matching unit comprises:
Subelement is divided in the adjacent area set, is used for the space set of cells being divided into different adjacent area set according to time-frequency;
The coupling subelement is used for the running time-frequency resource that will distribute according to described MBSFN district, each adjacent area that the division subelement marks off is gathered in described MBSFN district and described adjacent area gather and mate;
Relation is obtained subelement, is used for the matching result according to described coupling subelement, obtains the number of cells that comprises in the number of cells of the set of described each adjacent area and described MBSFN district mating and the described MBSFN district relation between the two.
Compared with prior art, embodiments of the invention have the following advantages:
By MBSFN district and adjacent area sets match, and according to the match condition Resources allocation, make sub-district as much as possible use identical running time-frequency resource, increased many sub-districts and merged gain that the running time-frequency resource of having avoided occurring in the Random assignment remains the still current distributable contradiction of resource that do not have.
Description of drawings
Fig. 1 is the division exemplary plot of the interior adjacent area of set of cells subclass in the prior art;
Fig. 2 is the division exemplary plot of running time-frequency resource in the prior art;
Fig. 3 is the distribution method flow chart of the running time-frequency resource in the embodiment of the invention;
Fig. 4 is MBSFN district and the adjacent area sets match schematic diagram in the embodiment of the invention;
Fig. 5 is the distribution method flow chart in time-frequency resource allocating when failure in the embodiment of the invention;
Fig. 6 is the resource allocation failure schematic diagram in the embodiment of the invention;
Fig. 7 is resource fragmentation and the MBSFN fragment schematic diagram in the embodiment of the invention;
Fig. 8 is the interference coordination algorithm schematic diagram in the embodiment of the invention;
Fig. 9 is another interference coordination algorithm schematic diagram in the embodiment of the invention;
Figure 10 is the distributing equipment schematic diagram of the running time-frequency resource in the embodiment of the invention.
Embodiment
Embodiments of the invention have disclosed a kind of distribution method of running time-frequency resource: MCE running time-frequency resource have been carried out the branch timing, need to give the identical running time-frequency resource of each cell allocation of a MBSFN district assurance, method comprises: with the space set of cells is divided into different adjacent area set according to time-frequency, MBSFN district and the set of each adjacent area are mated, according to the match condition Resources allocation, allow sub-district as much as possible use identical running time-frequency resource, it is big as far as possible to make many sub-districts merge gain.In addition, when many cell transmission support that cell transmission merges, neighbor cell may occur belongs to different MBS FN service area, is assigned with the situation of same frequency simultaneously, at this moment neighbor cell can produce co-channel interference, so it also is the problem that needs solution that the neighbor cell interference in different MBS FN district is coordinated, embodiments of the invention have also proposed solution.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Embodiments of the invention one have disclosed a kind of distribution method of running time-frequency resource, are example to distribute running time-frequency resource in comprising the MBSFN district of L sub-district, as shown in Figure 3, specifically may further comprise the steps:
Step S301, all adjacent areas set on each frequency range in MBSFN district (L sub-district arranged in supposing) and the set of cells are mated respectively, obtain MBSFN district and adjacent area intersection of sets collection number of cells M (M
1, M
2M
i, i is the number of adjacent area set) and the adjacent area set in get rid of residue number of cells N (N behind the common factor sub-district
1, N
2N
i), M≤L.
Concrete, the adjacent area set is the adjacent area subclass, if there is the adjacent area that does not belong to the adjacent area set in certain sub-district in the set of adjacent area, thinks that then this sub-district is an edge cell.The number of the edge cell of an adjacent area set is E, and when certain adjacent area set number of cells one timing, E is more little, thinks that then this adjacent area interior of a set extent of polymerization is high more, can bring more most sub-district to merge gain.The total number of all adjacent area subclass edge cell of a cell set is TE, number of cells one timing in cell set, and TE is more little, thinks that then the interior polymeric degree of this cell set is high more.
Step S302, MCE judge whether to exist adjacent area set M (M
1, M
2M
i), making then changes step S403 by M=L when existing, otherwise can think running time-frequency resource sub-distribution just failure.
Step S303, MCE carry out resource allocation in the set of the adjacent area of M=L.
If only there is the adjacent area set of a M=L, then select this adjacent area set carrying out resource allocation;
If there is the adjacent area set of a plurality of M=L, in these adjacent area set, select adjacent area set the carrying out resource allocation of N minimum.The principle of selecting is specially: when the set of the adjacent area of N minimum has when a plurality of, preferentially select to make minimum adjacent area set the carrying out resource allocation of residue idle district on certain frequency range.On certain frequency range there being when a plurality of the set of the minimum adjacent area of residue idle district, the idle district collection beyond this adjacent area set on this frequency range is carried out TE calculate, and selects adjacent area set the carrying out resource allocation of TE minimum.The schematic diagram of this distribution supposes that wherein the adjacent area set 2 in the time-frequency 2 is the selected adjacent area set of carrying out resource allocation as shown in Figure 4.
If the M of each adjacent area set and MBSFN district matching result, can think then that the time-frequency resource allocating this time in this MBSFN district is failed less than L.
Based on the foregoing description, in another embodiment, time-frequency resource allocating failure last handling process, as shown in Figure 5, concrete steps comprise:
Step S501, MCE need to judge whether resource rearrangement, if do not need, change step S502, otherwise carry out the resource rearrangement process, will be specifically introduced hereinafter for the resource rearrangement process.
Step S502, under the situation that does not need resource rearrangement, select adjacent area set carrying out resource allocation.
When not needing resource rearrangement, resource allocation can be followed following principle:
At first select adjacent area set the carrying out resource allocation of M maximum.If it is a plurality of that the set of the adjacent area of M maximum has, will carry out TE by the cell set that N the sub-district, residue sub-district behind these set eliminating common factor sub-districts, adjacent area formed and calculate, select adjacent area set the carrying out resource allocation of TE minimum.When the set of the adjacent area of TE minimum has when a plurality of, the adjacent area set that M sub-district of these adjacent areas set formed is calculated, select the adjacent area of E minimum to gather and carry out resource allocation.
Step S503, for (L-M) the individual sub-district that also is not assigned with running time-frequency resource in the MBSFN district, constitute a cell set, carry out the division of adjacent area subclass, obtain several new MBSFN districts, distribute running time-frequency resource once more, as shown in Figure 6.
Step S504, when distributing through several times, the number of cells in MBSFN district because the many cell transmission gains that bring are limited, can judge that the single cell pattern of employing transmits, as shown in Figure 7 during less than certain threshold.
Need to prove, when all sub-districts all are assigned to running time-frequency resource in the former MBSFN district, resource allocation this time just is counted as merit, otherwise, in case there is the sub-district to be difficult to be assigned to resource in the MBSFN district, all resources that are assigned with before reclaiming in this MBSFN district will be reclaimed by MCE, and this MBSFN district business can not send.
Adopt above-mentioned algorithm, can when time-frequency resource allocating, produce minimum fragment (be not assigned with resource and can't constitute the less relatively sub-district of adjacent area subclass of adjacent area subclass or formation), but each MBMS session constantly begins and finishes, As time goes on, still can produce fragment, time-frequency resource allocating still can continue to optimize.Therefore, can pass through resource rearrangement, these fragments are merged as far as possible.When the adjacent area of maximum set number of cells is lower than specified threshold, or MBSFN can start the running time-frequency resource reforming process when distinguishing timing resource failure frequently.
In starting the resource rearrangement process, MCE judges and need reform to which region resource.Because though MBMS session meeting changes the fragment area distribution, but still there is the MBSFN district on some running time-frequency resources during this period of time relatively stable, perhaps remain the idle district number seldom always, then needn't break original distribution pattern, need not to carry out running time-frequency resource and reform these MBSFN zones.MCE distinguishes the time frequency range of chip distribution, the sub-district sum in the idle district collection in the frequency range when adding up each, and to statistics by from big to small sequence arrangement.The MBSFN district that MCE preferentially selects to remain on the big running time-frequency resource of idle district number redistributes resource.On same running time-frequency resource, distribute according to the MBSFN district, each the adjacent area subclass in the idle district and each MBSFN district are merged into new adjacent area subclass.Because before starting resource rearrangement, the process that the failure of a MBSFN area resource distribution is arranged, MCE can note this MBSFN district, this MBSFN district and various possible new adjacent area subclass are mated, distribute running time-frequency resource according to the principle that makes the M maximum, and the MBSFN district that took this resource is originally redistributed resource.
In above-mentioned time-frequency resource allocating process, may run into that neighbor cell belongs to different MBS FN service area but the situation that is assigned with identical running time-frequency resource simultaneously, this moment, neighbor cell can produce co-channel interference.For solving the problem of neighbor cell co-channel interference, embodiments of the invention propose the method for following two kinds of interference coordinations:
(1) MBSFN is distinguished timing frequently after the resource, the formation MBSFN protection zone, adjacent area non-MBSFN district in, specifically comprise for the method for the coordinating district interference in the protection zone: the identical running time-frequency resource of protection zone is no longer distributed to other MBSFN districts uses.
(2) if when having only a small amount of sub-district (less than certain threshold value) to fall into adjacent MBSFN district in the protection zone; and what adjacent MBSFN district distributed is identical running time-frequency resource; only need get rid of these sub-districts out from adjacent MBSFN district and adopt single cell transmission, this running time-frequency resource then can be used in remaining zone.
For said method (1), the identical running time-frequency resource in the protection zone is no longer distributed to the method for the interference coordination that uses in other MBSFN districts, and as shown in Figure 8, concrete steps comprise:
After step S801, the professional beginning in MBSFN district, MCE utilizes the distribution method of above-mentioned Fig. 3 and the described running time-frequency resource of Fig. 5 that MBSFN is distinguished timing resource frequently.
Step S802, MCE search all neighbor cells of this MBSFN area edge sub-district, write down each sub-district ID.
Whether step S803, MCE detect has new business to send, if there is new business to send, changes step S804, otherwise proceeds to detect.
Step S804, MCE record is by the new business running time-frequency resource to be taken of the method acquisition of above-mentioned time-frequency resource allocating.
Step S805, MCE judge the current time frequency range that whether has professional in use new business, if having, change step S806, otherwise change step S809.
If the current time frequency range that has professional in use new business of step S806, MCE judges whether new business is identical with the business of using this frequency range, if inequality, changes step S807, otherwise changes step S809.
If step S807 new business and the adjacent area ID that is using the professional inequality of this frequency range, MCE to judge whether to comprise in the new business MBSFN district business of sending, if comprise, commentaries on classics step S808, otherwise commentaries on classics step S809.
Send professional adjacent area ID if step S808 new business MBSFN district comprises, MCE then gets rid of the running time-frequency resource of acquisition, redistributes running time-frequency resource, and MCE continues to detect whether new business is arranged, and gets back to step S804 then.
Step S809, MCE give the MBSFN district of new business with the time-frequency resource allocating that obtains, and write down the adjacent area ID of this MBSFN area edge sub-district, and MCE continues to detect whether new business is arranged, and gets back to step S804.
For said method (2), in the protection zone, have only a small amount of sub-district (less than certain threshold value, as N3) to fall into the method for adjacent MBSFN district interference coordination, as shown in Figure 9, concrete steps comprise:
After step S901, the professional beginning in MBSFN district, MCE utilizes above-mentioned Fig. 3 and the described distribution method of time frequency resources of Fig. 5 to distribute resource to the MBSFN district.
Step S902, MCE search all neighbor cells of this MBSFN area edge sub-district, write down each sub-district ID.
Step S903, MCE have judged whether that new business sends, if having, change step S904, otherwise wait for the transmission request of new business.
If step S904 has new business to send, MCE writes down frequency division on time and joins the new business running time-frequency resource to be taken that algorithm obtains.
Step S905, MCE judge the current time frequency range that whether has professional in use new business, if having, change step S906, otherwise change step S909.
If the current time frequency range that has professional in use new business of step S906, MCE judges whether new business is identical with the business of using this frequency range, if inequality, changes step S907, otherwise changes step S909.
If step S907 uses two business of this frequency range inequality, MCE judges the adjacent area ID that whether comprises the business of sending in the new business MBSFN district, if do not comprise, changes step S908, otherwise changes step S909.
Step S908, MCE give the MBSFN district of new business with the time-frequency resource allocating that obtains, and write down the adjacent area ID of this MBSFN area edge sub-district.MCE continues to detect whether new business is arranged, and gets back to step S904.
If step S909 new business MBSFN district comprises professional neighbor cell, whether MCE judges sub-district number that this new business MBSFN district comprises less than N3, if less than, change step S910, otherwise commentaries on classics step S911.
Step S910, MCE adopt single cell transmission with these sub-districts, the resource that the residue cell allocation obtains.
If step S911 and the sub-district number that comprises are more than or equal to N3, MCE gets rid of the running time-frequency resource that obtains, and redistributes running time-frequency resource, gets back to step S904.
The method that provides by the foregoing description, by MBSFN district and adjacent area subclass coupling, and according to the match condition Resources allocation, make sub-district as much as possible use identical running time-frequency resource, increased many sub-districts and merged gain, the running time-frequency resource of having avoided occurring in the Random assignment remains the still current distributable contradiction of resource that do not have.In addition, transmit different MBMS when professional, solved the problem of how presence of intercell interference being coordinated by interference coordination mechanism when neighbor cell uses same running time-frequency resource.
In the embodiments of the invention three, provide a kind of time-frequency resource allocating equipment, as shown in figure 10, having comprised:
Time-frequency allocation units 20 are used for the match condition according to matching unit 10, select adjacent area set the carrying out distribution of described MBSFN district running time-frequency resource.
Time-frequency allocation units 20 may further include:
First time-frequency distributes subelement 21, be used to exist the set of one or more adjacent areas, when making in the set of described adjacent area the number of cells that number of cells with described MBSFN district coupling equals to comprise in the described MBSFN district, the selection adjacent area is gathered and is carried out described MBSFN district time-frequency resource allocating; Judgment sub-unit 22 is used for not existing the set of one or more adjacent areas, when making the number of cells that the number of cells of mating with described MBSFN district in the set of described adjacent area equals to comprise in the described MBSFN district, judges whether to carry out resource rearrangement; Second time-frequency distributes subelement 23, be used for not existing the set of one or more adjacent areas, make in the set of described adjacent area number of cells with described MBSFN district coupling equal the number of cells that comprises in the described MBSFN district and when not needing to carry out resource rearrangement, the selection adjacent area is gathered and is carried out described MBSFN district time-frequency resource allocating.
In another embodiment, described time-frequency resource allocating equipment also comprises:
Single cell pattern judging unit 30 when being used for the number of cells that comprises when the MBSFN district less than the thresholding preset, adopts single cell pattern to transmit.
Resource rearrangement judging unit 40 is used to judge whether to carry out resource rearrangement;
Interference coordination is provided with unit 60, is used for the result of described time-frequency resource allocating is carried out the interference coordination setting minizone phase mutual interference that causes with the MBSFN district that avoids identical running time-frequency resource because of adjacent two sub-districts to be assigned to different business.
This interference coordination is provided with unit 60 and may further include:
First is provided with subelement 61, is used for after the MBSFN differentiation timing frequency resource, and the adjacent area in the non-MBSFN district constitutes the MBSFN protection zone, and the identical running time-frequency resource of described protection zone is no longer distributed to other MBSFN districts and used;
Second is provided with subelement 62, be used for after the MBSFN differentiation timing frequency resource, adjacent area in the non-MBSFN district constitutes the MBSFN protection zone, if what the small part sub-district that has quantity to be lower than certain threshold value in the described protection zone fell into that adjacent MBSFN district and adjacent MBSFN district distribute is identical running time-frequency resource, then described small part sub-district is got rid of out from adjacent MBSFN district and adopt single cell transmission; Otherwise this running time-frequency resource is not distributed to described adjacent MBSFN district.
A kind of time-frequency resource allocating equipment for the foregoing description is described can be the MBMS coordination entity MCE in the network.
The said equipment that provides by the foregoing description, by MBSFN district and adjacent area subclass coupling, and according to the match condition Resources allocation, make sub-district as much as possible use identical running time-frequency resource, increased many sub-districts and merged gain, the running time-frequency resource of having avoided occurring in the Random assignment remains the still current distributable contradiction of resource that do not have.In addition, transmit different MBMS when professional, solved the problem of how presence of intercell interference being coordinated by interference coordination mechanism when neighbor cell uses same running time-frequency resource
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this obtains the machine software product and is stored in the storage medium, comprises that some instructions are used so that a station terminal equipment is carried out the described method of each embodiment of the present invention.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (16)
1. a distribution method of time frequency resources is used for the media broadcast multicast service, it is characterized in that, may further comprise the steps:
Multicast broadcast single frequency network MBSFN district and the set of each adjacent area are mated;
Adjacent area set the carrying out distribution of described MBSFN district running time-frequency resource of preset matching requirements is satisfied in selection;
The wherein said set of multicast broadcast single frequency network MBSFN district and each adjacent area is mated, comprise:
With the space set of cells is divided into different adjacent area set according to time-frequency;
Running time-frequency resource according to described MBSFN district will distribute mates described MBSFN district and described each adjacent area set;
Obtain the number of cells that comprises in the number of cells of the set of described each adjacent area and described MBSFN district mating and the described MBSFN district relation between the two.
2. distribution method of time frequency resources according to claim 1, it is characterized in that, there is the adjacent area set, when making in the set of described adjacent area the number of cells that number of cells with described MBSFN district coupling equals to comprise in the described MBSFN district, described selection adjacent area is gathered the distribution of carrying out described MBSFN district running time-frequency resource and is specifically comprised:
When the adjacent area set of described existence has only one, in the set of described adjacent area, carry out the distribution of MBSFN district running time-frequency resource;
The set of the adjacent area of described existence has when a plurality of, selects adjacent area set the carrying out resource allocation of N minimum in described a plurality of adjacent areas set; When the set of the adjacent area of N minimum has when a plurality of, select to make minimum adjacent area set the carrying out resource allocation of residue idle district on certain frequency range; The minimum adjacent area set of residue idle district is had when a plurality of, the idle district collection beyond this adjacent area set on this frequency range is carried out TE calculate, select adjacent area set the carrying out resource allocation of TE minimum;
Wherein, N is that the quantity of sub-district deducts number of cells after the number of cells of mating with described MBSFN district in the adjacent area set; TE is the interior polymeric degree of a plurality of sub-districts.
3. distribution method of time frequency resources according to claim 1, it is characterized in that, there is not the adjacent area set, when making in the set of described adjacent area the number of cells that number of cells with described MBSFN district coupling equals to comprise in the described MBSFN district, described selection adjacent area is gathered the distribution of carrying out described MBSFN district running time-frequency resource and is specially:
Judge whether to carry out resource rearrangement, then carry out resource rearrangement when needing;
Described judged result is selected maximum adjacent area set the carrying out resource allocation of M when not needing resource rearrangement; The set of the adjacent area of described M maximum has when a plurality of, obtains the TE of the cell set of being made up of N sub-district of described adjacent area set, and the adjacent area of selection TE minimum is gathered and carried out resource allocation; When the set of the adjacent area of TE minimum has when a plurality of, obtain the E of the adjacent area set of M sub-district of described adjacent area set forming, select the adjacent area of E minimum to gather and carry out resource allocation;
Wherein, M is the number of cells of adjacent area set and described MBSFN district coupling; N is the number of cells after the quantity of sub-district in the set of adjacent area deducts the number of cells of mating with described MBSFN district; TE is the interior polymeric degree of a plurality of sub-districts; E is the edge cell total number in the set of adjacent area.
4. as distribution method of time frequency resources as described in the claim 3, it is characterized in that, described judged result when not needing resource rearrangement, select specific adjacent area set to carry out resource allocation after, also comprise:
For the running time-frequency resource sub-district that also is not assigned with in the described MBSFN district, constitute a cell set, carry out the division of adjacent area set, obtain several new MBSFN districts, carry out described distribution method of time frequency resources once more; When all sub-districts all were assigned to running time-frequency resource in the former MBSFN district, resource allocation this time just was counted as merit, otherwise, when having the sub-district to be difficult to be assigned to resource in the MBSFN district, reclaim all resources that are assigned with before in the described MBSFN district.
5. as distribution method of time frequency resources as described in claim 1 or 4, it is characterized in that the number of cells that comprises in the described MBSFN district adopts single cell pattern to transmit during less than default thresholding.
6. distribution method of time frequency resources according to claim 1 is characterized in that, after the distribution of described MBSFN district running time-frequency resource is carried out in the adjacent area set that preset matching requirements is satisfied in described selection, also comprises:
When set number of cells in the adjacent area of remaining maximum is lower than specified threshold, carry out resource rearrangement.
7. as distribution method of time frequency resources as described in claim 3 or 6, it is characterized in that described resource rearrangement is specially:
Sub-district sum in the idle district collection in the frequency range when adding up each, and statistics sorted; The MBSFN district of preferentially selecting to remain on the big running time-frequency resource of idle district number according to described ranking results redistributes resource;
On same running time-frequency resource, distribute according to the MBSFN district, each the adjacent area set in the idle district is merged into new adjacent area set with each MBSFN district.
8. distribution method of time frequency resources according to claim 1 is characterized in that, after the distribution of described MBSFN district running time-frequency resource is carried out in the adjacent area set that preset matching requirements is satisfied in described selection, also comprises:
Result to described time-frequency resource allocating carries out the interference coordination setting, the sub-district phase mutual interference that causes with the MBSFN district that avoids identical running time-frequency resource because of adjacent two sub-districts to be assigned to different business.
9. as distribution method of time frequency resources as described in the claim 8, it is characterized in that described interference coordination setting comprises:
After a MBSFN differentiation timing frequency resource, the adjacent area, MBSFN district in the non-MBSFN district constitutes the MBSFN protection zone, and the identical running time-frequency resource of described protection zone is no longer distributed to other MBSFN districts and used.
10. as distribution method of time frequency resources as described in the claim 8, it is characterized in that described interference coordination setting comprises:
After a MBSFN differentiation timing frequency resource, adjacent area in the non-MBSFN district constitutes the MBSFN protection zone, if what the small part sub-district that has quantity to be lower than threshold value in the described protection zone fell into that adjacent MBSFN district and adjacent MBSFN district distribute is identical running time-frequency resource, then described small part sub-district is got rid of out from adjacent MBSFN district and adopt single cell transmission; Otherwise described running time-frequency resource is not distributed to described adjacent MBSFN district.
11. a time-frequency resource allocating equipment is used for the media broadcast multicast service, it is characterized in that, comprising:
Matching unit is used for MBSFN district and the set of each adjacent area are mated;
The time-frequency allocation units are used to select to satisfy adjacent area set the carrying out distribution of described MBSFN district running time-frequency resource of preset matching requirements;
Wherein said matching unit comprises:
Subelement is divided in the adjacent area set, is used for the space set of cells being divided into different adjacent area set according to time-frequency;
The coupling subelement is used for the running time-frequency resource that will distribute according to described MBSFN district, each adjacent area that the division subelement marks off is gathered in described MBSFN district and described adjacent area gather and mate;
Relation is obtained subelement, is used for the matching result according to described coupling subelement, obtains the number of cells that comprises in the number of cells of the set of described each adjacent area and described MBSFN district mating and the described MBSFN district relation between the two.
12., it is characterized in that described time-frequency allocation units specifically comprise as time-frequency resource allocating equipment as described in the claim 11:
First time-frequency distributes subelement, be used to exist the set of one or more adjacent areas, when making in the set of described adjacent area the number of cells that number of cells with described MBSFN district coupling equals to comprise in the described MBSFN district, the selection adjacent area is gathered and is carried out the distribution of described MBSFN district running time-frequency resource;
Judgment sub-unit is used for not existing the set of one or more adjacent areas, when making the number of cells that the number of cells of mating with described MBSFN district in the set of described adjacent area equals to comprise in the described MBSFN district, judges whether to carry out resource rearrangement;
Second time-frequency distributes subelement, be used for not existing the set of one or more adjacent areas, make in the set of described adjacent area number of cells with described MBSFN district coupling equal the number of cells that comprises in the described MBSFN district and when not needing to carry out resource rearrangement, the selection adjacent area is gathered and is carried out the distribution of described MBSFN district running time-frequency resource.
13. as time-frequency resource allocating equipment as described in the claim 11, it is characterized in that, also comprise:
Single cell pattern judging unit when being used for the number of cells that comprises when the MBSFN district less than the thresholding preset, adopts single cell pattern to transmit.
14. as time-frequency resource allocating equipment as described in the claim 11, it is characterized in that, also comprise:
The resource rearrangement judging unit is used to judge whether to carry out resource rearrangement;
The resource rearrangement unit, being used for described resource rearrangement judgment unit judges is in the time of need carrying out resource rearrangement, carries out running time-frequency resource and reforms.
15. as time-frequency resource allocating equipment as described in the claim 11, it is characterized in that, also comprise:
Interference coordination is provided with the unit, is used for the result of described time-frequency resource allocating is carried out the interference coordination setting sub-district phase mutual interference that causes with the MBSFN district that avoids identical running time-frequency resource because of adjacent two sub-districts to be assigned to different business.
16., it is characterized in that described interference coordination is provided with the unit and specifically comprises as time-frequency resource allocating equipment as described in the claim 15:
First is provided with subelement, is used for after the MBSFN differentiation timing frequency resource, and the adjacent area in the non-MBSFN district constitutes the MBSFN protection zone, and the identical running time-frequency resource of described protection zone is no longer distributed to other MBSFN districts and used;
Second is provided with subelement, be used for after the MBSFN differentiation timing frequency resource, adjacent area in the non-MBSFN district constitutes the MBSFN protection zone, if what the small part sub-district that has quantity to be lower than threshold value in the described protection zone fell into that adjacent MBSFN district and adjacent MBSFN district distribute is identical running time-frequency resource, then described small part sub-district is got rid of out from adjacent MBSFN district and adopt single cell transmission; Otherwise described running time-frequency resource is not distributed to described adjacent MBSFN district.
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| CN2007101984898A CN101466071B (en) | 2007-12-17 | 2007-12-17 | Method and apparatus for distributing time frequency resource |
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| CN102006557B (en) * | 2009-08-31 | 2015-05-13 | 中兴通讯股份有限公司 | Method and base station for avoiding disturbance to enhanced multicast broadcasting services (E-MBS) |
| CN101841774B (en) * | 2010-02-08 | 2013-06-05 | 中国联合网络通信集团有限公司 | Dynamic MBSFN decision method and device based on mobile network |
| CN102480685B (en) * | 2010-11-22 | 2015-09-16 | 中兴通讯股份有限公司 | A kind of method and apparatus using TVWS MBMS transmission |
| BR112014003316B1 (en) * | 2011-08-12 | 2022-10-18 | Telefonaktiebolaget Lm Ericsson (Publ) | METHOD, BASE STATION AND USER EQUIPMENT TO DETERMINE AT LEAST ONE CONTROL TIMER SETTING NUMBER |
| CN104734830B (en) * | 2015-03-05 | 2017-12-26 | 京信通信技术(广州)有限公司 | A kind of method and apparatus for configuring frequency range |
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| CN1863355A (en) * | 2006-06-26 | 2006-11-15 | 北京天碁科技有限公司 | TD SCDMA terminal and cell searching method under common-frequency network |
| CN101064904A (en) * | 2006-04-26 | 2007-10-31 | 华为技术有限公司 | Method for transmitting broadcasting multicasting service and system thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101064904A (en) * | 2006-04-26 | 2007-10-31 | 华为技术有限公司 | Method for transmitting broadcasting multicasting service and system thereof |
| CN1863355A (en) * | 2006-06-26 | 2006-11-15 | 北京天碁科技有限公司 | TD SCDMA terminal and cell searching method under common-frequency network |
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