CN103188814B - Resource regulating method and the system of CRS power is improved in LTE system - Google Patents
Resource regulating method and the system of CRS power is improved in LTE system Download PDFInfo
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Abstract
The present invention relates to wireless communication technology field, disclose a kind of resource regulating method improving CRS power in LTE system, comprising: calculate respectively and treat that dispatched users contains the symbol power of reference signal and do not contain the symbol power of reference signal, and get maximum power; Use power headroom to be more than or equal to described maximum power if current, then schedule said user, and renewal can use power headroom to be the described current difference using power headroom and described maximum power; Use power headroom to be less than described maximum power if current, then calculate the current PRB quantity that can use of user, if described PRB quantity is not less than minimum scheduling resource unit, then with described PRB quantity for limiting schedule said user, and renewal can use power headroom to be 0, otherwise do not dispatch this user.The present invention is by when promoting CRS power, and the mode of control data symbol transmission resource ensures the transmitted power lifting values of CRS, thus strengthens descending covering.
Description
Technical field
The present invention relates to wireless communication technology field, particularly a kind of resource regulating method and system improving CRS power in LTE system.
Background technology
Allocating cell public reference signal (Cell-specific Reference Signal, CRS) pilot signal transmitted power, CRS pilot signal is made to carry out with different power the basic function that transmission is Long Term Evolution (Long Term Evolution, LTE) system.When system bandwidth is determined, the number of CRS is also determined, the gross power of CRS Resource Unit (CRS ResourceElement, CRS RE) and data resource element (data RE) can not exceed the single carrier maximum power that agreement specifies.If therefore only promote the power (namely promoting CRS power) of CRS RE, do not process the power of data RE, the power on whole symbol is promoted, so that exceedes single carrier maximum transmission power.Physical layer finds that total power value exceedes this maximum transmission power; be not damaged to protect radio-frequency devices; power in each resource can be unified again to be compressed; after compression, the power of CRS RE can be lowered again; do not reach the object promoting CRS RE power, thus do not reach the object strengthening descending covering yet.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: how effectively to improve CRS RE power, to improve descending covering power.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of resource regulating method improving CRS power in LTE system, comprising step:
Calculate respectively and treat that dispatched users contains the symbol power of reference signal and do not contain the symbol power of reference signal, and get maximum power;
Use power headroom to be more than or equal to described maximum power if current, then schedule said user, and renewal can use power headroom to be the described current difference using power headroom and described maximum power;
Use power headroom to be less than described maximum power if current, then calculate the current Physical Resource Block PRB(Physical Resource Block that can use of user, PRB) quantity, if described PRB quantity is not less than minimum scheduling resource unit, then with described PRB quantity for limiting schedule said user, and renewal can use power headroom to be 0, otherwise do not dispatch this user.
Wherein, calculate scheduled user respectively contain the symbol power of reference signal and containing the concrete mode of the symbol power of reference signal be not:
E
A=E
CRS×P_a
E
B=E
A×ρ
B/ρ
A
Wherein, E
arepresent the Resource Unit energy not comprising orthogonal frequency division multiplex OFDM (OrthogonalFrequency Division Multiplexing, the OFDM) symbol of reference symbol, E
brepresent the Resource Unit energy comprising the OFDM symbol of reference symbol, E
cRSrepresent the transmitted power of community own reference signal, P_a is the specific semi-static parameter of subscriber equipment, ρ
arepresent the ratio not comprising the Physical Downlink Shared Channel PDSCH power in the OFDM symbol of community own reference signal and CRS RE power; ρ
brepresent the ratio comprising the PDSCH power in the OFDM symbol of community own reference signal and CRS RE power.
Wherein, the concrete mode of the current PRB quantity that can use of described calculating user is:
The mono-PRB of used power headroom/Max(before this user of PRB quantity=dispatch is containing the symbol user power of reference signal, and single PRB is containing the symbol user power of reference signal), wherein, Max is for getting max function.
Present invention also offers a kind of resource scheduling system improving CRS power in LTE system, comprising:
For calculating respectively, power computation module, treats that dispatched users contains the symbol power of reference signal and do not contain the symbol power of reference signal, and gets maximum power;
Power comparing module, for current use power headroom to be more than or equal to described maximum power time schedule said user, and upgrade power headroom can be used to be the described current difference using power headroom and described maximum power;
Restriction scheduler module, for current use power headroom to be less than described maximum power time then calculate user current can use Physical Resource Block PRB quantity, if described PRB quantity is not less than minimum scheduling resource unit, then with described PRB quantity for limiting schedule said user, and renewal can use power headroom to be 0, otherwise do not dispatch this user.
Wherein, described power computation module is calculated as follows scheduled user respectively containing the symbol power of reference signal with not containing the symbol power of reference signal:
E
A=E
CRS×P_a
E
B=E
A×ρ
B/ρ
A
Wherein, E
arepresent the Resource Unit energy not comprising the orthogonal frequency division multiplex OFDM symbol of reference symbol, E
brepresent the Resource Unit energy comprising the OFDM symbol of reference symbol, E
cRSrepresent the transmitted power of community own reference signal, P_a is the specific semi-static parameter of subscriber equipment, ρ
arepresent the ratio not comprising the Physical Downlink Shared Channel PDSCH power in the OFDM symbol of community own reference signal and CRS RE power; ρ
brepresent the ratio comprising the PDSCH power in the OFDM symbol of community own reference signal and CRS RE power.
Wherein, described restriction scheduler module is calculated as follows the PRB quantity that user can use:
The mono-PRB of used power headroom/Max(before this user of PRB quantity=dispatch is containing the symbol user power of reference signal, and single PRB is containing the symbol user power of reference signal), wherein, Max is for getting max function.
(3) beneficial effect
The present invention is by when promoting CRS power, and the mode of controls transfer data RE quantity ensure that and the transmitted power lifting values of CRS enhances descending covering power simultaneously.
Accompanying drawing explanation
Fig. 1 is a kind of resource regulating method flow chart improving CRS power in LTE system of the embodiment of the present invention;
Fig. 2 is a kind of resource scheduling system structural representation improving CRS power in LTE system of the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
The resource regulating method improving CRS power in LTE system of the present embodiment as shown in Figure 1, comprising:
Step S110, calculates scheduled user respectively containing the symbol power of reference signal (RS) with not containing the symbol power of reference signal, and gets maximum power.Specifically in conjunction with port number configuration and the pilot tone pattern (the RE number of CRS symbol and data symbol on each symbol can be obtained) of this community, this user can be calculated respectively containing RS with not containing the symbol power of RS.
E
A=E
CRS×P_a
E
B=E
A×ρ
B/ρ
A
PDSCH(Physical Downlink Shared Channel, Physical Downlink Shared Channel) the EPRE(downlink power control of upper data RE determines the energy of every resource particle) be divided into two classes: type A and type B.Wherein, type A is the data resource element (data RE) of the OFDM symbol not comprising reference symbol, and type B is the data resource element (data RE) of the OFDM symbol comprising reference symbol.
E
arepresent every Resource Unit ENERGY E PRE of the PDSCH RE of type A, unit is W;
E
brepresent every Resource Unit ENERGY E PRE of the PDSCH RE of type B, unit is W;
E
cRSrepresent the transmitted power of community own reference signal, unit is W, is pre-configured parameter;
P_a is the specific semi-static parameter of user equipment (UE), is specified by the radio resource managing unit RRC of high level, for determining the exclusive parameter of UE, ρ
arepresent the power of PDSCH and the ratio of CRS RE power that do not comprise in the OFDM symbol of community own reference signal; ρ
brepresent the power of PDSCH and the ratio of CRS RE power that comprise in the OFDM symbol of community own reference signal.Following table is the intrinsic ratio ρ in community to 1,2 or 4 community fixed antenna ports in agreement 36.213rel910 version
b/ ρ
astandard.
This user can be calculated respectively in conjunction with the information in upper table contain RS and do not get maximum power containing after the symbol power of RS.
Step S120, subtracts each other the power headroom before scheduling and maximum power, and judges whether difference is more than or equal to 0.
Step S130, if difference is more than or equal to 0, then this user's schedulable and do not do resource restriction, enter normal consistency flow process.And to upgrade power headroom be difference after subtracting each other with maximum power.
Step S140, if difference is less than 0, then calculate physical radio carrying (PRB) quantity that this user of scheduling can use: the mono-PRB of used power headroom/Max(before this user of PRB quantity=dispatch is containing the symbol user power of RS, and single PRB does not contain the symbol user power of RS).
Step S150, judges whether the PRB quantity calculated is less than minimum scheduling resource unit (relevant to realization, each producer is different), if be less than, then and this user's non-scheduling.
Step S160, if the PRB quantity calculated is not less than minimum scheduling resource unit, then dispatches this user with the PRB quantity calculated for limiting, entering normal consistency flow process, upgrade power headroom and be set to 0 after dispatching this user.
A PRB comprises multiple data RE, limits PRB number and is equivalent to decrease data RE number.In order to improve downstream signal covering power, the power of data RE must increase along with the raising of CRSRE power, therefore, adopt the single carrier maximum power reducing the number of data RE and make the gross power of CRS and data RE can not exceed agreement specify, while improve again downstream signal covering power.
The resource regulating method improving CRS power in LTE system of the present invention passes through when promoting CRS power, and the mode of control data symbol transmission resource ensures the transmitted power lifting values of CRS, thus strengthens descending covering.Control data symbol transmission resource also can ensure that the power of data RE is also improved or remains unchanged when CRS power improves in addition.Moreover this processing mode does not need to increase interface, logic is clear and definite, realizes simple, does not increase difficulty and the workload of product development.
Present invention also offers a kind of resource scheduling system improving CRS power in LTE system, comprising:
For calculating respectively, power computation module 210, treats that dispatched users contains the symbol power of reference signal and do not contain the symbol power of reference signal, and gets maximum power;
Power comparing module 220, for current use power headroom to be more than or equal to described maximum power time schedule said user, and upgrade power headroom can be used to be the described current difference using power headroom and described maximum power;
Restriction scheduler module 230, for current use power headroom to be less than described maximum power time then calculate user current can use PRB quantity, if described PRB quantity is not less than minimum scheduling resource unit, then with described PRB quantity for limiting schedule said user, and renewal can use power headroom to be 0, otherwise do not dispatch this user.
Power computation module 210 is calculated as follows scheduled user respectively containing the symbol power of reference signal with not containing the symbol power of reference signal:
E
A=E
CRS×P_a
E
B=E
A×ρ
B/ρ
A
Wherein, E
arepresent the Resource Unit energy not comprising the OFDM symbol of reference symbol, E
brepresent the Resource Unit energy comprising the OFDM symbol of reference symbol, E
cRSrepresent the transmitted power of community own reference signal, P_a is the specific semi-static parameter of subscriber equipment, ρ
arepresent the ratio not comprising the Physical Downlink Shared Channel PDSCH power in the OFDM symbol of community own reference signal and CRS RE power; ρ
brepresent the ratio comprising the PDSCH power in the OFDM symbol of community own reference signal and CRS RE power.
Restriction scheduler module 230 is calculated as follows the PRB quantity that user can use:
The mono-PRB of used power headroom/Max(before this user of PRB quantity=dispatch is containing the symbol user power of reference signal, and single PRB is containing the symbol user power of reference signal), wherein, Max is for getting max function.
Above execution mode is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (4)
1. in LTE system, improve a resource regulating method for CRS power, it is characterized in that, comprise step:
Calculate respectively and treat that dispatched users contains the symbol power of reference signal and do not contain the symbol power of reference signal, and get maximum power;
Use power headroom to be more than or equal to described maximum power if current, then schedule said user, and renewal can use power headroom to be the described current difference using power headroom and described maximum power;
Use power headroom to be less than described maximum power if current, then calculate the current Physical Resource Block PRB quantity that can use of user, if described PRB quantity is not less than minimum scheduling resource unit, then with described PRB quantity for limiting schedule said user, and renewal can use power headroom to be 0, otherwise do not dispatch this user;
Calculate scheduled user respectively contain the symbol power of reference signal and containing the concrete mode of the symbol power of reference signal be not:
E
A＝E
CRS×P_a
E
B＝E
A×ρ
B/ρ
A
Wherein, E
arepresent the Resource Unit energy not comprising the orthogonal frequency division multiplex OFDM symbol of reference symbol, E
brepresent the Resource Unit energy comprising the OFDM symbol of reference symbol, E
cRSrepresent the transmitted power of community own reference signal, P_a is the specific semi-static parameter of subscriber equipment, ρ
arepresent the ratio not comprising the Physical Downlink Shared Channel PDSCH power in the OFDM symbol of community own reference signal and CRS RE power; ρ
brepresent the ratio comprising the PDSCH power in the OFDM symbol of community own reference signal and CRS RE power.
2. in LTE system, improve the resource regulating method of CRS power as claimed in claim 1, it is characterized in that, the concrete mode of the current PRB quantity that can use of described calculating user is:
Used power headroom/Max (, containing the symbol user power of reference signal, single PRB is containing the symbol user power of reference signal for single PRB) before this user of PRB quantity=dispatch, wherein, Max is for getting max function.
3. in LTE system, improve a resource scheduling system for CRS power, it is characterized in that, comprising:
For calculating respectively, power computation module, treats that dispatched users contains the symbol power of reference signal and do not contain the symbol power of reference signal, and gets maximum power;
Power comparing module, for current use power headroom to be more than or equal to described maximum power time schedule said user, and upgrade power headroom can be used to be the described current difference using power headroom and described maximum power;
Restriction scheduler module, for current use power headroom to be less than described maximum power time then calculate user current can use Physical Resource Block PRB quantity, if described PRB quantity is not less than minimum scheduling resource unit, then with described PRB quantity for limiting schedule said user, and renewal can use power headroom to be 0, otherwise do not dispatch this user;
Described power computation module is calculated as follows scheduled user respectively containing the symbol power of reference signal with not containing the symbol power of reference signal:
E
A＝E
CRS×P_a
E
B＝E
A×ρ
B/ρ
A
Wherein, E
arepresent the Resource Unit energy not comprising the orthogonal frequency division multiplex OFDM symbol of reference symbol, E
brepresent the Resource Unit energy comprising the OFDM symbol of reference symbol, E
cRSrepresent the transmitted power of community own reference signal, P_a is the specific semi-static parameter of subscriber equipment, ρ
arepresent the ratio not comprising the Physical Downlink Shared Channel PDSCH power in the OFDM symbol of community own reference signal and CRS RE power; ρ
brepresent the ratio comprising the PDSCH power in the OFDM symbol of community own reference signal and CRS RE power.
4. in LTE system, improve the resource scheduling system of CRS power as claimed in claim 3, it is characterized in that, described restriction scheduler module is calculated as follows the PRB quantity that user can use:
Used power headroom/Max (, containing the symbol user power of reference signal, single PRB is containing the symbol user power of reference signal for single PRB) before this user of PRB quantity=dispatch, wherein, Max is for getting max function.
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| CN104284439B (en) * | 2013-07-10 | 2018-05-11 | 中国移动通信集团公司 | The dispatching method and device of a kind of user terminal |
| CN104995970A (en) * | 2013-09-30 | 2015-10-21 | 华为技术有限公司 | Method and device for controlling uplink power |
| CN106941716A (en) * | 2016-01-04 | 2017-07-11 | 中兴通讯股份有限公司 | A kind of sending method of cell common reference signal, device and base station |
| CN110012533B (en) * | 2018-01-05 | 2020-09-25 | 大唐移动通信设备有限公司 | Resource allocation method and device |
| CN110708756B (en) * | 2018-07-09 | 2023-01-31 | 成都鼎桥通信技术有限公司 | Resource allocation method and equipment based on channel power |
| CN115175325A (en) * | 2021-04-02 | 2022-10-11 | 大唐移动通信设备有限公司 | Resource allocation method, device and apparatus for uplink control channel and storage medium |
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| CN102196564A (en) * | 2010-03-19 | 2011-09-21 | 电信科学技术研究院 | Method and equipment for allocating uplink shared resources |
| CN102638894A (en) * | 2012-04-27 | 2012-08-15 | 电信科学技术研究院 | Method and equipment for distributing PDSCH (physical downlink shared channel) power |
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| CN102196564A (en) * | 2010-03-19 | 2011-09-21 | 电信科学技术研究院 | Method and equipment for allocating uplink shared resources |
| CN102638894A (en) * | 2012-04-27 | 2012-08-15 | 电信科学技术研究院 | Method and equipment for distributing PDSCH (physical downlink shared channel) power |
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