CN103428640B - Power distribution method and device based on eMBMS group system downlinks - Google Patents
Power distribution method and device based on eMBMS group system downlinks Download PDFInfo
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Abstract
The present invention discloses a kind of power distribution method and device based on eMBMS group system downlinks, and wherein this method comprises the following steps：Determine the lower line activating collection of each user；The union of eNB issues corresponding DCI1C, and power and CCE progress self-adjusted blocks to DCI1C in the lower line activating collection of user.Lower line activating collection of the invention by first judging each user, further according to lower line activating set pair, its corresponding DCI1C carries out power and CCE carries out self-adjusted block, so as to ensure that the correct demodulation of DCI1C, PMCH, and reasonable distribution resource is played to eMBMS systems, and the not effect of waste of resource.
Description
Technical field
The present invention relates to wireless communication field, more particularly to a kind of power based on eMBMS group system downlinks point
Method of completing the square and device.
Background technology
LTE mobile communication system, mainly includes：Core net (CN) and access net (E_UTRAN), core net mainly includes
MME (mobile management entity) and S-GW (gateway), access net are made of, core eNB (node of long evolving system)
It is internal different by S1 (interface between core net and access net) interface inter-link intercommunication, access net between heart net and access net
Pass through X2 (interface mutual eNB) interface inter-link intercommunication between eNB.
The Power Control of downlink is generally comprised to following reference signal and physical channel in LET mobile communication system
Power Control：(physical broadcast is believed by PSS (master sync signal), SSS (auxiliary synchronous signals), CRS (public reference signal), PBCH
Road), PCFICH (Physical Control Format Indicator Channel), PHICH (physical mixing retransmission indicating chanel), PDCCH (physical down controls
Channel processed), PDSCH (Physical Downlink Shared Channel), PMCH (Physical Multicast Channel).And to eMBMS (multimedia broadcast multicast industry
Business) group system for, it is ensured that the correct demodulation of DCI1C (being used to refer to MCCH multicast control channels change notifications), PMCH
It is vital, while must assure that physical resource does not waste.
Therefore, there is an urgent need for a kind of power distribution method correctly demodulated that can guarantee that DCI1C, PMCH.
The content of the invention
The main object of the present invention is to provide a kind of power distribution method based on eMBMS group system downlinks, purport
Ensureing the correct demodulation of DCI1C, PMCH.
The present invention provides a kind of power distribution method based on eMBMS group system downlinks, comprise the following steps：
Determine the lower line activating collection of each user；
The union of eNB issues corresponding DCI1C in the lower line activating collection of user, and power to DCI1C and CCE carry out from
Adapt to distribution.
Preferably, also wrapped before the step of union of eNB issues corresponding DCI1C in the lower line activating collection of the user
Include：
Each eNB is judged whether in the lower line activating collection of user, if so, then performing the lower line activating collection of the user
The step of union of interior eNB issues corresponding DCI1C；If it is not, then terminate this flow.
Preferably, power and CCE the progress self-adjusted block to DCI1C specifically includes：
After the maximum transmission power removing cell reference signals in controlling symbols, the power shared by PCFICH, PHICH
Remaining power distributes to uplink scheduling and descending scheduling by preset proportion；
Judge whether the PDCCH transmission powers of current scheduling user exceed 1.2 times of the remaining power, if so, then
CCE location findings are carried out, and distribute the number of resources and resource location of current scheduling user；If it is not, then by next scheduling user
As current scheduling user, return and whether perform the PDCCH general powers for judging current scheduling user more than described remaining
1.2 times of power the step of, until all scheduling users judge to terminate.
Preferably, further included after the step of number of resources and resource location of the distribution current scheduling user：
Judge whether current scheduling user is assigned to resource, if so, then being returned to the PDCCH resource of current scheduling user
Move back；If it is not, then perform described using next scheduling user as the step of current scheduling user.
Preferably, the step of lower line activating collection of definite each user specifically includes：
Assign one index value of user in activation collection；
Under currently transmitted time interval, all users in cyclic activation collection；
The index value that flag bit is the user for 0 is initialized.
Present invention also offers a kind of power distribution unit based on eMBMS group system downlinks, including：
Activation collection determining module, for determining the lower line activating collection of each user；
Self-adjusted block module, the union for eNB in the lower line activating collection of user issue corresponding DCI1C, and right
The power and CCE of DCI1C carries out self-adjusted block.
Preferably, the self-adjusted block module is additionally operable to：
Judge each eNB whether in the lower line activating collection of user, if so, in the lower line activating collection of user eNB's and
Collection then issues corresponding DCI1C.
Preferably, the self-adjusted block module specifically includes：
Power adaptive allocation unit, for by controlling symbols maximum transmission power remove cell reference signals,
Remaining power distributes to uplink scheduling and descending scheduling by preset proportion after power shared by PCFICH, PHICH；
CCE position search units, it is described remaining whether the PDCCH transmission powers for judging current scheduling user exceed
1.2 times of power, if so, then carrying out CCE location findings, and distribute the number of resources and resource location of current scheduling user；If
It is no, then using next scheduling user as current scheduling user, continue to judge whether the PDCCH general powers of current scheduling user exceed
1.2 times of remaining power the step of, until all scheduling users judge to terminate.
Preferably, the CCE position search units are additionally operable to：
Judge whether current scheduling user is assigned to resource, if so, then being returned to the PDCCH resource of current scheduling user
Move back；If it is not, then using next scheduling user as current scheduling user.
Preferably, the activation collection determining module is specifically used for：
Assign one index value of user in activation collection；
Under currently transmitted time interval, all users in cyclic activation collection；
The index value that flag bit is the user for 0 is initialized.
Lower line activating collection of the invention by first judging each user, further according to its corresponding DCI1C of lower line activating set pair
Carry out power and CCE carries out self-adjusted block, so as to ensure that the correct demodulation of DCI1C, PMCH, and eMBMS systems are risen
To reasonable distribution resource, and the not effect of waste of resource.
Brief description of the drawings
Fig. 1 is the flow signal of power distribution method one embodiment of the invention based on eMBMS group system downlinks
Figure；
Fig. 2 is the work(to the DCI1C issued in the power distribution method of the invention based on eMBMS group system downlinks
Rate and CCE carry out the flow diagram of one embodiment of self-adjusted block；
Fig. 3 is the work(to the DCI1C issued in the power distribution method of the invention based on eMBMS group system downlinks
Rate and CCE carry out the flow diagram of another embodiment of self-adjusted block；
Fig. 4 is to determine that the downlink of user swashs in the power distribution method of the invention based on eMBMS group system downlinks
The flow diagram of collection living；
Fig. 5 is the structural representation of power distribution unit one embodiment of the invention based on eMBMS group system downlinks
Figure；
Fig. 6 is self-adjusted block module in the power distribution unit of the invention based on eMBMS group system downlinks
Structure diagram.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Embodiment
Technical scheme is further illustrated below in conjunction with Figure of description and specific embodiment.It should be appreciated that this
Locate described specific embodiment only to explain the present invention, be not intended to limit the present invention.
With reference to Fig. 1, Fig. 1 is power distribution method one embodiment of the invention based on eMBMS group system downlinks
Flow diagram.The power distribution method based on eMBMS group system downlinks comprises the following steps：
Step S101, the lower line activating collection of each user is determined；
Activation collection refers to that user establishes the set of the cell of connection by mobile station.The lower line activating collection of each user can be with
Judged according to every RB (resource grains subgroup) uplink received powers and timeliness of each eNB.The timeliness can be：Setting one
The timer of region class, within this period, by its mark position (flag) 1 if UE has been scheduled, otherwise sets to 0,
After timer time has arrived, all UE in reprocessing activation collection.For example, every RB (resource grains subgroup) according to each eNB
Uplink received power and timeliness may determine that, the activation collection of user UE1 is { eNB1 }, the activation collection of user UE2 for eNB1,
eNB2}。
Step S102, the union of eNB issues corresponding DCI1C in the lower line activating collection of user, and power to DCI1C and
CCE carries out self-adjusted block.
If the activation collection that user UE1 is determined after step S101 be { eNB1 }, the activation collection of user UE2 be eNB1,
ENB2 }, then the union of eNB is { eNB1, eNB2 } in user UE1 and user UE2, then is somebody's turn to do { eNB1, eNB2 } and issues accordingly
DCI1C, and power and CCE progress self-adjusted blocks to DCI1C.Specifically, the distribution of CCE refers to that each eNB must be identical,
The channel quality condition of all UE can be integrated and determined.The distribution of power refers to the transmission power of each eNB according to being covered
UE determine.Such as the user of eNB1 coverings be UE1, UE2, the users of eNB2 coverings is UE2, UE3, UE4, the use that eNB3 is covered
Family is UE4, UE5.ENB1, eNB2, eNB3 then can determine its power according to the user UE included by itself.In addition, this hair
The self-adjusted block of the distribution of DCI1C power and CCE in bright embodiment, are the side of the first distribution CCE, then distribution power that take
Formula.Moreover, during self-adjusted block, when having the subframe that uplink scheduling sends if first carry out descending scheduling, then again
Carry out uplink scheduling.When the subframe of uplink scheduling cannot be sent, then only directly terminate after descending scheduling is disposed.
The embodiment of the present invention is by first judging the lower line activating collection of each user, and further according to lower line activating set pair, its is corresponding
DCI1C carries out power and CCE carries out self-adjusted block, so that ensure that the correct demodulation of DCI1C, PMCH, and to eMBMS systems
System plays reasonable distribution resource, and the not effect of waste of resource.
Further, further included before above-mentioned steps S102：
Each eNB is judged whether in the lower line activating collection of user, if so, then performing step S102；If it is not, then terminate
This flow.
If each eNB can not issue DCI1C, can so save money not in the lower line activating collection of any user
Source.
Further, power and CCE the progress self-adjusted block of DCI1C is specifically wrapped in reference Fig. 2, above-mentioned steps S102
Include：
Step S201, by shared by the maximum transmission power removing cell reference signals in controlling symbols, PCFICH, PHICH
Remaining power distributes to uplink scheduling and descending scheduling by preset proportion after power；
Preset proportion accounts for the ratio of up and down power resource for uplink power resource, such as the ratio of up and down power resource is
x：Y, then preset proportion is x/ (x+y).Therefore, by controlling symbols maximum transmission power deduct give PCFICH, PHICH and
The x/ (x+y) of remaining power distributes to uplink scheduling, the 1-x/ of remaining power after power shared by cell reference signals
(x+y) descending scheduling is distributed to.The set of the controlling symbols channel such as including PDCCH, PCFICH and PHICH.
Step S202, judge whether the PDCCH transmission powers of current scheduling user exceed the power of the descending scheduling
1.2 times, if so, then performing step S203；If it is not, then perform step S204；
The PDCCH transmission powers of current scheduling user are to deduct the maximum transmission power in controlling symbols to give
Remaining power after PCFICH, PHICH and power shared by cell reference signals.Judge the PDCCH hairs of current scheduling user
Penetrate 1.2 times that whether power exceedes the power of the descending scheduling, i.e., whether above-mentioned (x+y)/y is greater than or equal to 1.2, if
It is then to perform step S203；If it is not, then perform step S204；
Step S203, CCE location findings are carried out, and distribute the number of resources and resource location of current scheduling user；
When 1.2 times of the power that the PDCCH transmission powers of current scheduling user exceed the descending scheduling, then basis is worked as
The PDCCH transmission powers of preceding scheduling user carry out the search of CCE positions, and distribute the number of resources and resource-niche of active user
Put, after CCE location determinations, both can determine that the collocation of the power and CCE of DCI1C.Then the collocation can also be recorded, and ought
The schedule flag position of preceding user is 1, updates allocated PDCCH transmission powers and the bitmap of cell CCE.Cell CCE's
Bitmap is represented to the position of CCE in cell into line flag.
Step S204, judge to dispatch user and whether circulate to terminate, if so, then performing step S205；If it is not, then terminate this stream
Journey；
Step S205, using next scheduling user as current scheduling user, and return and perform step S202.
It is when 1.2 times of the power that the PDCCH transmission powers of current scheduling user are no more than the descending scheduling, then not right
Active user is scheduled, and using next scheduling user as current scheduling user, returns and performs step S202, until all tune
Degree user judges to terminate.
Further, further included afterwards with reference to Fig. 3, above-mentioned steps S203：
Step S206, judge whether current scheduling user is assigned to resource；If so, then perform step S207；If it is not, then hold
Row step S204；
Step S207, retract to the PDCCH resource of current scheduling user, then perform step S204.
If current scheduling user is in the assigning process of uplink and downlink number of resources and resource location due to number and position
The limitation put is unallocated to arrive resource, then can retract to the CCE resources and power resource of current scheduling user, so as to other
User uses, so that resource has obtained preferably, reasonably utilizing.
Further, specifically included with reference to Fig. 4, above-mentioned steps S101：
Step S401, one index value of user in activation collection is assigned；
Step S402, under currently transmitted time interval, all users in cyclic activation collection；
Step S403, the index value for the user that flag bit is 0 is initialized.
The timer of a region class can be set, within this period, if user is scheduled, it dispatches mark
Will position will be set to 1, otherwise be set to 0.Therefore, one index value of user in activation collection can be first assigned, and when currently transmitted
Between be spaced under, all users in cyclic activation collection, whether the flag bit for judging user is 1, if for 1 (being 0), will
The index value initializes.
With reference to Fig. 5, Fig. 5 is power distribution unit one embodiment of the invention based on eMBMS group system downlinks
Structure diagram.The power distribution unit based on eMBMS group system downlinks includes：
Activation collection determining module 10, for determining the lower line activating collection of each user；
Self-adjusted block module 11, the union for eNB in the lower line activating collection of user issue corresponding DCI1C, and right
The power and CCE of DCI1C carries out self-adjusted block.
Activation collection determining module 10 can be according to every RB (resource grains subgroup) uplink received powers and timeliness of each eNB
The lower line activating collection of each user is judged.The timeliness can be：The timer of a region class is set, at this
Between in section, by its mark position (flag) 1 if UE has been scheduled, otherwise sets to 0, after timer time has arrived, then locate
All UE in reason activation collection.For example, the activation collection of user UE1 is { eNB1 }, the activation collection of user UE2 is { eNB1, eNB2 }.
If activation collection determining module 10 determines that the activation collection of user UE1 is that { eNB1 }, the activation collection of user UE2 are
{ eNB1, eNB2 }, then the union of eNB is { eNB1, eNB2 } in user UE1 and user UE2, then is somebody's turn to do { eNB1, eNB2 } and issues phase
The DCI1C answered, self-adjusted block module 11 and power and CCE progress self-adjusted blocks to DCI1C.Specifically, the distribution of CCE
Refer to that each eNB must be identical, the channel quality condition of all UE can be integrated and determined.The distribution of power refers to each eNB
Transmission power determined according to the UE that is covered.Such as the user of eNB1 coverings be UE1, UE2, the users of eNB2 coverings be UE2,
UE3, UE4, the user of eNB3 coverings is UE4, UE5.ENB1, eNB2, eNB3 then can according to the user UE included by itself come
Determine its power.In addition, the self-adjusted block of the distribution of DCI1C power and CCE in the embodiment of the present invention, are the first distribution taken
The mode of CCE, then distribution power.Moreover, during self-adjusted block, when having the subframe that uplink scheduling sends if first
Descending scheduling is carried out, then carries out uplink scheduling again.When the subframe of uplink scheduling cannot be sent, then only at descending scheduling
Directly terminate after reason.
The embodiment of the present invention is by first judging the lower line activating collection of each user, and further according to lower line activating set pair, its is corresponding
DCI1C carries out power and CCE carries out self-adjusted block, so that ensure that the correct demodulation of DCI1C, PMCH, and to eMBMS systems
System plays reasonable distribution resource, and the not effect of waste of resource.
Further, above-mentioned self-adjusted block module 11 is additionally operable to：
Judge each eNB whether in the lower line activating collection of user, if so, in the lower line activating collection of user eNB's and
Collection just issues corresponding DCI1C.If each eNB can not issue DCI1C, such as not in the lower line activating collection of any user
This can save resource.
Further, specifically included with reference to Fig. 6, above-mentioned self-adjusted block module 11：
Power adaptive allocation unit 111, for by controlling symbols maximum transmission power remove cell reference signals,
Remaining power distributes to uplink scheduling and descending scheduling by preset proportion after power shared by PCFICH, PHICH；
CCE position search units 112, it is described surplus whether the PDCCH transmission powers for judging current scheduling user exceed
1.2 times of remaining power, if so, then carrying out CCE location findings, and distribute the number of resources and resource-niche of current scheduling user
Put；If it is not, then continue to judge the PDCCH transmission powers of current scheduling user using next scheduling user as current scheduling user
Whether 1.2 times of the remaining power are exceeded, until all scheduling users judge to terminate.
Preset proportion accounts for the ratio of up and down power resource for uplink power resource, such as the ratio of up and down power resource is
x：Y, then preset proportion is x/ (x+y).Therefore, power adaptive allocation unit 111 can be by the emission maximum in controlling symbols
Power, which deducts, to be given the x/ (x+y) of remaining power after PCFICH, PHICH and power shared by cell reference signals and distributes to
Uplink scheduling, the 1-x/ (x+y) of remaining power distribute to descending scheduling.
Then, it is described to will determine that whether the PDCCH transmission powers of current scheduling user exceed for CCE position search units 112
Whether 1.2 times of the power of descending scheduling, i.e., above-mentioned (x+y)/y are greater than or equal to 1.2.When the PDCCH of current scheduling user is sent out
When penetrating 1.2 times of the power that power exceedes the descending scheduling, then carried out according to the PDCCH transmission powers of current scheduling user
The search of CCE positions, and the number of resources and resource location of active user are distributed, after CCE location determinations, both it can determine that
The collocation of the power and CCE of DCI1C.Then the collocation can also be recorded, and is 1 by the schedule flag position of active user, more
The bitmap of new allocated PDCCH transmission powers and cell CCE.The bitmap of cell CCE represent to the position of CCE in cell into
Line flag.It is when 1.2 times of the power that the PDCCH transmission powers of current scheduling user are no more than the descending scheduling, then not right
Active user is scheduled, and using next scheduling user as current scheduling user, continues to judge the PDCCH hairs of current scheduling user
1.2 times that whether power exceedes the remaining power are penetrated, until all scheduling users judge to terminate.
Further, above-mentioned CCE position search units 112 are additionally operable to：
Judge whether current scheduling user is assigned to resource, if so, then being returned to the PDCCH resource of current scheduling user
Move back；If it is not, then using next scheduling user as current scheduling user.
If current scheduling user is in the assigning process of uplink and downlink number of resources and resource location due to number and position
The limitation put is unallocated to arrive resource, then can retract to the CCE resources and power resource of current scheduling user, so as to other
User uses, so that resource has obtained preferably, reasonably utilizing.
Further, above-mentioned activation collection determining module 10 is specifically used for：
Assign one index value of user in activation collection；Under currently transmitted time interval, the institute in cyclic activation collection is useful
Family；The index value that flag bit is the user for 0 is initialized.
The timer of a region class can be set, within this period, if user is scheduled, it dispatches mark
Will position will be set to 1, otherwise be set to 0.Therefore, above-mentioned activation collection determining module 10 can first assign one rope of user in activation collection
Draw value, and under currently transmitted time interval, all users in cyclic activation collection, whether the flag bit for judging user is 1, such as
Fruit is not 1 (being 0), then initializes the index value.
The foregoing is merely the preferred embodiment of the present invention, not thereby limits its scope of the claims, every to utilize the present invention
The equivalent structure or equivalent flow shift that specification and accompanying drawing content are made, is directly or indirectly used in other relevant technology necks
Domain, is included within the scope of the present invention.
Claims (8)
1. a kind of power distribution method based on eMBMS group system downlinks, it is characterised in that comprise the following steps：
Determine the lower line activating collection of each user；
The union of eNB issues corresponding DCI1C in the lower line activating collection of user, and power to DCI1C and CCE carry out it is adaptive
Distribution；
Wherein, power and CCE the progress self-adjusted block to DCI1C specifically includes：
Will be remaining after the maximum transmission power removing cell reference signals in controlling symbols, the power shared by PCFICH, PHICH
Power distribute to uplink scheduling and descending scheduling by preset proportion；
Judge whether the PDCCH transmission powers of current scheduling user exceed 1.2 times of the remaining power, if so, then carrying out
CCE location findings, and distribute the number of resources and resource location of current scheduling user；If it is not, then using it is next scheduling user as
Current scheduling user, returns and performs whether the PDCCH transmission powers for judging current scheduling user exceed the remaining work(
1.2 times of rate the step of, until all scheduling users judge to terminate.
2. power distribution method according to claim 1, it is characterised in that the lower line activating collection of the user eNB's and
Further included before the step of collection issues corresponding DCI1C：
Each eNB is judged whether in the lower line activating collection of user, if so, then performing the lower line activating collection eNB of the user
Union the step of issuing corresponding DCI1C；If it is not, then terminate this flow.
3. power distribution method according to claim 1, it is characterised in that the number of resources of the distribution current scheduling user
Further included after the step of mesh and resource location：
Judge whether current scheduling user is assigned to resource, if so, then retracting to the PDCCH resource of current scheduling user；
If it is not, then perform described using next scheduling user as the step of current scheduling user.
4. power distribution method according to claim 1, it is characterised in that the lower line activating collection for determining each user
The step of specifically include：
Assign one index value of user in activation collection；
Under currently transmitted time interval, all users in cyclic activation collection；
The index value that flag bit is the user for 0 is initialized.
A kind of 5. power distribution unit based on eMBMS group system downlinks, it is characterised in that including：
Activation collection determining module, for determining the lower line activating collection of each user；
Self-adjusted block module, the union for eNB in the lower line activating collection of user issue corresponding DCI1C, and to DCI1C's
Power and CCE carry out self-adjusted block；
Wherein, the self-adjusted block module specifically includes：
Power adaptive allocation unit, for by controlling symbols maximum transmission power remove cell reference signals, PCFICH,
Remaining power distributes to uplink scheduling and descending scheduling by preset proportion after power shared by PHICH；
Whether CCE position search units, the PDCCH transmission powers for judging current scheduling user exceed the remaining power
1.2 times, if so, then carrying out CCE location findings, and distribute the number of resources and resource location of current scheduling user；If it is not, then
Using next scheduling user as current scheduling user, continue to execute and judge whether the PDCCH transmission powers of current scheduling user surpass
The step of crossing 1.2 times of the remaining power, until all scheduling users judge to terminate.
6. power distribution unit according to claim 5, it is characterised in that the self-adjusted block module is additionally operable to：
Judge each eNB whether in the lower line activating collection of user, if so, the union of the lower line activating collection eNB of user then under
Send out DCI1C corresponding.
7. power distribution unit according to claim 5, it is characterised in that the CCE position search units are additionally operable to：
Judge whether current scheduling user is assigned to resource, if so, then retracting to the PDCCH resource of current scheduling user；
If it is not, then using next scheduling user as current scheduling user.
8. power distribution unit according to claim 5, it is characterised in that the activation collection determining module is specifically used for：
Assign one index value of user in activation collection；
Under currently transmitted time interval, all users in cyclic activation collection；
The index value that flag bit is the user for 0 is initialized.
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| CN1943138A (en) * | 2005-01-05 | 2007-04-04 | 摩托罗拉公司 | Method and apparatus for scheduling and synchronizing a multimedia broadcast/multicast service |
| US20070066298A1 (en) * | 2005-09-19 | 2007-03-22 | Michael Hurst | Allocation of a performance indicator among cells in a cellular communication system |
| CN101677273A (en) * | 2008-09-18 | 2010-03-24 | 中兴通讯股份有限公司 | Resource distribution method of multimedia broadcast and multicast service and radio network controller |
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