CN103428640A - Power distribution method and device based on eMBMS trunking system down link - Google Patents
Power distribution method and device based on eMBMS trunking system down link Download PDFInfo
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- CN103428640A CN103428640A CN2012101621908A CN201210162190A CN103428640A CN 103428640 A CN103428640 A CN 103428640A CN 2012101621908 A CN2012101621908 A CN 2012101621908A CN 201210162190 A CN201210162190 A CN 201210162190A CN 103428640 A CN103428640 A CN 103428640A
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Abstract
The invention discloses a power distribution method and device based on an eMBMS trunking system down link. The method includes the steps that step 1, a down active set of each user is determined; step 2, union sets of eNB in the down active sets of the users issue corresponding DCI1C, and self-adaptation distribution is carried out on power of the DCI1C and a CCE. According to the power distribution method and device, the down active set of each user is judged, then, self-adaptation distribution is carried out on the power of the corresponding DCI1C and the CCE according to the down active sets, therefore, correct demodulation on the DCI1C and a PMCH is guaranteed, reasonable resource distribution on the eMBMS system is achieved, and resources can not be wasted.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of power distribution method and device based on eMBMS group system down link.
Background technology
The LTE mobile communication system, mainly comprise: core net (CN) and Access Network (E_UTRAN), core net mainly comprises the MME(mobile management entity) and the S-GW(gateway), Access Network is by a node of eNB(long evolving system) form, between core net and Access Network by the interface between S1(core net and Access Network) the interface inter-link intercommunication, between the inner different eNB of Access Network by X2(eNB interface each other) the interface inter-link intercommunication.
In the LET mobile communication system, the power of down link is controlled the power generally comprise following reference signal and physical channel and is controlled: the PSS(master sync signal), the SSS(auxiliary synchronous signals), the CRS(public reference signal), the PBCH(Physical Broadcast Channel), the PCFICH(Physical Control Format Indicator Channel), the PHICH(physical mixing retransmission indicating chanel), the PDCCH(Physical Downlink Control Channel), the PDSCH(Physical Downlink Shared Channel), the PMCH(Physical Multicast Channel).And concerning the eMBMS(multimedia broadcast multi-broadcasting business) group system, guarantee that DCI1C(is used to refer to MCCH multicast control channel change notifications), the correct demodulation of PMCH is vital, must guarantee that physical resource do not waste simultaneously.
Therefore, need badly a kind of can guarantee DCI1C, PMCH the power distribution method of correct demodulation.
Summary of the invention
Main purpose of the present invention is to provide a kind of power distribution method based on eMBMS group system down link, be intended to guarantee DCI1C, PMCH correct demodulation.
The invention provides a kind of power distribution method based on eMBMS group system down link, comprise the following steps:
Determine each user's descending Active Set;
In user's descending Active Set, the union of eNB issues corresponding DCI1C, and power and the CCE of DCI1C carried out to the self adaptation distribution.
Preferably, the union of eNB also comprises before issuing the step of corresponding DCI1C in described user's descending Active Set:
Judge that each eNB is whether all in user's descending Active Set, if the union of carrying out eNB in described user's descending Active Set issues the step of corresponding DCI1C; If not, process ends.
Preferably, the described power to DCI1C and CCE carry out the self adaptation distribution and specifically comprise:
After maximum transmission power on control character is removed to the shared power of cell reference signals, PCFICH, PHICH, remaining power is distributed to uplink scheduling and descending scheduling by preset proportion;
Whether the PDCCH transmitting power that judges current scheduling user surpasses 1.2 times of described remaining power, if carry out the CCE location finding, and distribute number of resources and the resource location of current scheduling user; If not, using next dispatched users as current scheduling user, return to execution is described judges whether the PDCCH gross power of current scheduling user surpasses the step of 1.2 times of described remaining power, until the judgement of all dispatched users finishes.
Preferably, after the step of the number of resources of described distribution current scheduling user and resource location, also comprise:
Judge whether current scheduling user is assigned to resource, if the PDCCH resource of current scheduling user is carried out to rollback; If not, carry out the described step using next dispatched users as current scheduling user.
Preferably, the step of described definite each user's descending Active Set specifically comprises:
Give the index value of user in Active Set;
Under current transmission time interval, all users in the cyclic activation collection;
By flag bit, it is the index value initialization for 0 user.
The present invention also provides a kind of power distribution unit based on eMBMS group system down link, comprising:
The Active Set determination module, for determining each user's descending Active Set;
The self adaptation distribution module, issue corresponding DCI1C for the union of eNB in user's descending Active Set, and power and the CCE of DCI1C carried out to the self adaptation distribution.
Preferably, described self adaptation distribution module also for:
Judge that each eNB is whether all in user's descending Active Set, if in user's descending Active Set, the union of eNB issues corresponding DCI1C.
Preferably, described self adaptation distribution module specifically comprises:
The power adaptive allocation units, remove the shared power of cell reference signals, PCFICH, PHICH for the maximum transmission power by control character after remaining power distribute to uplink scheduling and descending scheduling by preset proportion;
Whether the CCE position search unit, surpass 1.2 times of described remaining power, if carry out the CCE location finding, and distribute number of resources and the resource location of current scheduling user for the PDCCH transmitting power that judges current scheduling user; If not, using next dispatched users as current scheduling user, continue to judge whether the PDCCH gross power of current scheduling user surpasses the step of 1.2 times of described remaining power, until the judgement of all dispatched users finishes.
Preferably, described CCE position search unit also for:
Judge whether current scheduling user is assigned to resource, if the PDCCH resource of current scheduling user is carried out to rollback; If not, using next dispatched users as current scheduling user.
Preferably, described Active Set determination module specifically for:
Give the index value of user in Active Set;
Under current transmission time interval, all users in the cyclic activation collection;
By flag bit, it is the index value initialization for 0 user.
The present invention is by first judging each user's descending Active Set, according to descending Active Set, its corresponding DCI1C is carried out to power again and CCE carries out the self adaptation distribution, thereby guaranteed the correct demodulation of DCI1C, PMCH, and the eMBMS system is played to the reasonable distribution resource, and do not waste the effect of resource.
The accompanying drawing explanation
Fig. 1 is the schematic flow sheet that the present invention is based on power distribution method one embodiment of eMBMS group system down link;
Fig. 2 is that the power and the CCE that the present invention is based in the power distribution method of eMBMS group system down link the DCI1C to issuing carry out the schematic flow sheet that self adaptation is distributed an embodiment;
Fig. 3 is that the power and the CCE that the present invention is based in the power distribution method of eMBMS group system down link the DCI1C to issuing carry out the schematic flow sheet that self adaptation is distributed another embodiment;
Fig. 4 the present invention is based on the schematic flow sheet of determining user's descending Active Set in the power distribution method of eMBMS group system down link;
Fig. 5 is the structural representation that the present invention is based on power distribution unit one embodiment of eMBMS group system down link;
Fig. 6 is the structural representation that the present invention is based on self adaptation distribution module in the power distribution unit of eMBMS group system down link.
The realization of the object of the invention, functional characteristics and advantage, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Further illustrate technical scheme of the present invention below in conjunction with Figure of description and specific embodiment.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
With reference to Fig. 1, Fig. 1 is the schematic flow sheet that the present invention is based on power distribution method one embodiment of eMBMS group system down link.Should comprise the following steps by the power distribution method based on eMBMS group system down link:
Step S101, determine each user's descending Active Set;
Active Set refers to the set of the community that the user connects by travelling carriage.Each user's descending Active Set can be according to every RB(resource grains subgroup of each eNB) uplink receiving power and ageing judgement.This is ageing can be: set the timer of a region class, within this time period, if UE just has been scheduled its mark position (flag) 1, otherwise set to 0, after timer time has arrived, then process all UE in Active Set.For example,, according to every RB(resource grains subgroup of each eNB) uplink receiving power and ageingly can judge, the Active Set of user UE1 is that { Active Set of eNB1}, user UE2 is { eNB1, eNB2}.
In step S102, user's descending Active Set, the union of eNB issues corresponding DCI1C, and power and the CCE of DCI1C carried out to the self adaptation distribution.
If determine after step S101, the Active Set of user UE1 is that { Active Set of eNB1}, user UE2 is { eNB1, eNB2}, in user UE1 and user UE2, the union of eNB is eNB1, this eNB1 issues corresponding DCI1C, and power and the CCE of DCI1C carried out to the self adaptation distribution.Particularly, the distribution of CCE refers to that each eNB must be identical, channel quality condition that can comprehensive all UE and determining.The distribution of power refers to that the transmitting power of each eNB determines according to covered UE.The user that for example eNB1 covers is UE1, UE2, and the user that eNB2 covers is UE2, UE3, UE4, and the user that eNB3 covers is UE4, UE5.ENB1, eNB2, eNB3 can be included according to self user UE decide its power.In addition, in the embodiment of the present invention, the self adaptation of DCI1C power division and CCE is distributed, and is the first distribution CCE taked, the mode of then distributing power.And, in the process that self adaptation is distributed, if first carry out descending scheduling during the subframe that has uplink scheduling to send, then carry out again uplink scheduling.In the time cannot sending the subframe of uplink scheduling, only after being disposed, directly finishes descending scheduling.
The embodiment of the present invention is by first judging each user's descending Active Set, according to descending Active Set, its corresponding DCI1C is carried out to power again and CCE carries out the self adaptation distribution, thereby guaranteed the correct demodulation of DCI1C, PMCH, and the eMBMS system is played to the reasonable distribution resource, and do not waste the effect of resource.
Further, before above-mentioned steps S102, also comprise:
Judge that each eNB is whether all in user's descending Active Set, if perform step S102; If not, process ends.
If each eNB, not in any user's descending Active Set, can not issue DCI1C, so can saving resource.
Further, with reference to Fig. 2, in above-mentioned steps S102, the power of DCI1C and CCE are carried out to the self adaptation distribution and specifically comprise:
Step S201, the maximum transmission power on control character is removed to the shared power of cell reference signals, PCFICH, PHICH after remaining power distribute to uplink scheduling and descending scheduling by preset proportion;
Preset proportion is the ratio that the ascending power resource accounts for the up and down power resource, and for example the ratio of up and down power resource is x:y, and preset proportion is x/(x+y).Therefore, the maximum transmission power on control character deduction is given to the x/(x+y of power remaining after the shared power of PCFICH, PHICH and cell reference signals) distribute to uplink scheduling, the 1-x/(x+y of remaining power) distribute to descending scheduling.This control character comprises the set of the channels such as PDCCH, PCFICH and PHICH.
Whether step S202, the PDCCH transmitting power that judges current scheduling user surpass 1.2 times of power of described descending scheduling, if perform step S203; If not, perform step S204;
The PDCCH transmitting power of current scheduling user is for giving the maximum transmission power on control character deduction remaining power after the shared power of PCFICH, PHICH and cell reference signals.Whether the PDCCH transmitting power that judges current scheduling user surpasses 1.2 times of power of described descending scheduling, and whether above-mentioned (x+y)/y is more than or equal to 1.2, if so, performs step S203; If not, perform step S204;
Step S203, carry out the CCE location finding, and distribute number of resources and the resource location of current scheduling user;
When the PDCCH of current scheduling user transmitting power surpasses 1.2 times of power of described descending scheduling, according to the PDCCH transmitting power of current scheduling user, carry out the search of CCE position, and distribution active user's number of resources and resource location, after the CCE location positioning, both can determine the collocation of power and the CCE of DCI1C.Then can also record this collocation, and be 1 by active user's scheduling mark position, the PDCCH transmitting power that renewal has distributed and the bitmap of community CCE.The bitmap of this community CCE means the position of CCE in community is indicated.
Step S204, judge the dispatched users end that whether circulates, if perform step S205; If not, process ends;
Step S205, using next dispatched users as current scheduling user, and return the execution step S202.
When the PDCCH of current scheduling user transmitting power is no more than 1.2 times of power of described descending scheduling, the active user is not dispatched, using next dispatched users as current scheduling user, return to execution step S202, until the judgement of all dispatched users finishes.
Further, with reference to Fig. 3, after above-mentioned steps S203, also comprise:
Step S206, judge whether current scheduling user is assigned to resource; If perform step S207; If not, perform step S204;
Step S207, the PDCCH resource of current scheduling user is carried out to rollback, then perform step S204.
If current scheduling user arrives resource because the restriction of number and position is unallocated in the assigning process of up-downgoing number of resources and resource location, can carry out rollback to CCE resource and the power resource of current scheduling user, so that other users use, thereby make resource obtain better, reasonably utilize.
Further, with reference to Fig. 4, above-mentioned steps S101 specifically comprises:
Step S401, give the index value of user in Active Set;
Under step S402, current transmission time interval, all users in the cyclic activation collection;
Step S403, the user's that is 0 by flag bit index value initialization.
Can set the timer of a region class, within this time period, if the user has been scheduled, its scheduling flag bit will be set to 1, otherwise be set to 0.Therefore, can first give the index value of user in Active Set, and, under current transmission time interval, all users in the cyclic activation collection, judge whether user's flag bit is 1, if for 1(, be not 0), by this index value initialization.
With reference to Fig. 5, Fig. 5 is the structural representation that the present invention is based on power distribution unit one embodiment of eMBMS group system down link.Should comprise by the power distribution unit based on eMBMS group system down link:
Active Set determination module 10, for determining each user's descending Active Set;
Self adaptation distribution module 11, issue corresponding DCI1C for the union of eNB in user's descending Active Set, and power and the CCE of DCI1C carried out to the self adaptation distribution.
Active Set determination module 10 can be according to every RB(resource grains subgroup of each eNB) uplink receiving power and ageing descending Active Set to each user judged.This is ageing can be: set the timer of a region class, within this time period, if UE just has been scheduled its mark position (flag) 1, otherwise set to 0, after timer time has arrived, then process all UE in Active Set.For example, the Active Set of user UE1 is that { Active Set of eNB1}, user UE2 is { eNB1, eNB2}.
If Active Set determination module 10 determines that the Active Set of user UE1 is for { Active Set of eNB1}, user UE2 is { eNB1, eNB2}, in user UE1 and user UE2, the union of eNB is eNB1, this eNB1 issues corresponding DCI1C, and self adaptation distribution module 11 is also carried out the self adaptation distribution to power and the CCE of DCI1C.Particularly, the distribution of CCE refers to that each eNB must be identical, channel quality condition that can comprehensive all UE and determining.The distribution of power refers to that the transmitting power of each eNB determines according to covered UE.The user that for example eNB1 covers is UE1, UE2, and the user that eNB2 covers is UE2, UE3, UE4, and the user that eNB3 covers is UE4, UE5.ENB1, eNB2, eNB3 can be included according to self user UE decide its power.In addition, in the embodiment of the present invention, the self adaptation of DCI1C power division and CCE is distributed, and is the first distribution CCE taked, the mode of then distributing power.And, in the process that self adaptation is distributed, if first carry out descending scheduling during the subframe that has uplink scheduling to send, then carry out again uplink scheduling.In the time cannot sending the subframe of uplink scheduling, only after being disposed, directly finishes descending scheduling.
The embodiment of the present invention is by first judging each user's descending Active Set, according to descending Active Set, its corresponding DCI1C is carried out to power again and CCE carries out the self adaptation distribution, thereby guaranteed the correct demodulation of DCI1C, PMCH, and the eMBMS system is played to the reasonable distribution resource, and do not waste the effect of resource.
Further, above-mentioned self adaptation distribution module 11 also for:
Judge that each eNB is whether all in user's descending Active Set, if in user's descending Active Set, the union of eNB just issues corresponding DCI1C.If each eNB, not in any user's descending Active Set, can not issue DCI1C, so can saving resource.
Further, with reference to Fig. 6, above-mentioned self adaptation distribution module 11 specifically comprises:
Power adaptive allocation units 111, remove the shared power of cell reference signals, PCFICH, PHICH for the maximum transmission power by control character after remaining power distribute to uplink scheduling and descending scheduling by preset proportion;
Whether CCE position search unit 112, surpass 1.2 times of described remaining power, if carry out the CCE location finding, and distribute number of resources and the resource location of current scheduling user for the PDCCH transmitting power that judges current scheduling user; If not, using next dispatched users as current scheduling user, continuation judges whether the PDCCH transmitting power of current scheduling user surpasses 1.2 times of described remaining power, until the judgement of all dispatched users finishes.
Preset proportion is the ratio that the ascending power resource accounts for the up and down power resource, and for example the ratio of up and down power resource is x:y, and preset proportion is x/(x+y).Therefore, power adaptive allocation units 111 can be given the maximum transmission power on control character deduction the x/(x+y of power remaining after the shared power of PCFICH, PHICH and cell reference signals) distribute to uplink scheduling, the 1-x/(x+y of remaining power) distribute to descending scheduling.
Then, CCE position search unit 112 will judge that whether the PDCCH transmitting power of current scheduling user surpasses 1.2 times of power of described descending scheduling, and whether above-mentioned (x+y)/y is more than or equal to 1.2.When the PDCCH of current scheduling user transmitting power surpasses 1.2 times of power of described descending scheduling, according to the PDCCH transmitting power of current scheduling user, carry out the search of CCE position, and distribution active user's number of resources and resource location, after the CCE location positioning, both can determine the collocation of power and the CCE of DCI1C.Then can also record this collocation, and be 1 by active user's scheduling mark position, the PDCCH transmitting power that renewal has distributed and the bitmap of community CCE.The bitmap of this community CCE means the position of CCE in community is indicated.When the PDCCH of current scheduling user transmitting power is no more than 1.2 times of power of described descending scheduling, the active user is not dispatched, using next dispatched users as current scheduling user, continuation judges whether the PDCCH transmitting power of current scheduling user surpasses 1.2 times of described remaining power, until the judgement of all dispatched users finishes.
Further, above-mentioned CCE position search unit 112 also for:
Judge whether current scheduling user is assigned to resource, if the PDCCH resource of current scheduling user is carried out to rollback; If not, using next dispatched users as current scheduling user.
If current scheduling user arrives resource because the restriction of number and position is unallocated in the assigning process of up-downgoing number of resources and resource location, can carry out rollback to CCE resource and the power resource of current scheduling user, so that other users use, thereby make resource obtain better, reasonably utilize.
Further, above-mentioned Active Set determination module 10 specifically for:
Give the index value of user in Active Set; Under current transmission time interval, all users in the cyclic activation collection; By flag bit, it is the index value initialization for 0 user.
Can set the timer of a region class, within this time period, if the user has been scheduled, its scheduling flag bit will be set to 1, otherwise be set to 0.Therefore, above-mentioned Active Set determination module 10 can first be given the index value of user in Active Set, and under current transmission time interval, all users in the cyclic activation collection, whether the flag bit that judges the user is 1, if for 1(, be not 0), by this index value initialization.
The foregoing is only the preferred embodiments of the present invention; not thereby limit its scope of the claims; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present invention.
Claims (10)
1. the power distribution method based on eMBMS group system down link, is characterized in that, comprises the following steps:
Determine each user's descending Active Set;
In user's descending Active Set, the union of eNB issues corresponding DCI1C, and power and the CCE of DCI1C carried out to the self adaptation distribution.
2. power distribution method according to claim 1, is characterized in that, the step that the union of the interior eNB of described user's descending Active Set issues corresponding DCI1C also comprises before:
Judge that each eNB is whether all in user's descending Active Set, if the union of carrying out eNB in described user's descending Active Set issues the step of corresponding DCI1C; If not, process ends.
3. power distribution method according to claim 2, is characterized in that, the described power to DCI1C and CCE carry out the self adaptation distribution and specifically comprise:
After maximum transmission power on control character is removed to the shared power of cell reference signals, PCFICH, PHICH, remaining power is distributed to uplink scheduling and descending scheduling by preset proportion;
Whether the PDCCH transmitting power that judges current scheduling user surpasses 1.2 times of described remaining power, if carry out the CCE location finding, and distribute number of resources and the resource location of current scheduling user; If not, using next dispatched users as current scheduling user, return to execution is described judges whether the PDCCH transmitting power of current scheduling user surpasses the step of 1.2 times of described remaining power, until the judgement of all dispatched users finishes.
4. power distribution method according to claim 3, is characterized in that, after the number of resources of described distribution current scheduling user and the step of resource location, also comprises:
Judge whether current scheduling user is assigned to resource, if the PDCCH resource of current scheduling user is carried out to rollback; If not, carry out the described step using next dispatched users as current scheduling user.
5. power distribution method according to claim 1, is characterized in that, the step of described definite each user's descending Active Set specifically comprises:
Give the index value of user in Active Set;
Under current transmission time interval, all users in the cyclic activation collection;
By flag bit, it is the index value initialization for 0 user.
6. the power distribution unit based on eMBMS group system down link, is characterized in that, comprising:
The Active Set determination module, for determining each user's descending Active Set;
The self adaptation distribution module, issue corresponding DCI1C for the union of eNB in user's descending Active Set, and power and the CCE of DCI1C carried out to the self adaptation distribution.
7. power distribution unit according to claim 6, is characterized in that, described self adaptation distribution module also for:
Judge that each eNB is whether all in user's descending Active Set, if in user's descending Active Set, the union of eNB issues corresponding DCI1C.
8. power distribution unit according to claim 7, is characterized in that, described self adaptation distribution module specifically comprises:
The power adaptive allocation units, remove the shared power of cell reference signals, PCFICH, PHICH for the maximum transmission power by control character after remaining power distribute to uplink scheduling and descending scheduling by preset proportion;
Whether the CCE position search unit, surpass 1.2 times of described remaining power, if carry out the CCE location finding, and distribute number of resources and the resource location of current scheduling user for the PDCCH transmitting power that judges current scheduling user; If not, using next dispatched users as current scheduling user, continue to carry out the step of 1.2 times whether the PDCCH transmitting power that judges current scheduling user surpasses described remaining power, until the judgement of all dispatched users finishes.
9. power distribution unit according to claim 8, is characterized in that, described CCE position search unit also for:
Judge whether current scheduling user is assigned to resource, if the PDCCH resource of current scheduling user is carried out to rollback; If not, using next dispatched users as current scheduling user.
10. power distribution unit according to claim 6, is characterized in that, described Active Set determination module specifically for:
Give the index value of user in Active Set;
Under current transmission time interval, all users in the cyclic activation collection;
By flag bit, it is the index value initialization for 0 user.
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| CN102412950A (en) * | 2011-11-15 | 2012-04-11 | 中兴通讯股份有限公司 | Coordination system of power of downlink control channel and method thereof |
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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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Effective date of registration: 20210303 Address after: 801-6, 8 / F, building 52, 2 Jingyuan North Street, Beijing Economic and Technological Development Zone, Daxing District, Beijing Patentee after: Beijing ZTE Gundam Communication Technology Co.,Ltd. Address before: 518057 Ministry of justice, Zhongxing building, South Science and technology road, Nanshan District hi tech Industrial Park, Shenzhen, Guangdong Patentee before: ZTE Corp. |
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