CN102387580B - The report method of the power headroom reporting that carrier wave is corresponding and system - Google Patents
The report method of the power headroom reporting that carrier wave is corresponding and system Download PDFInfo
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- CN102387580B CN102387580B CN201010268988.1A CN201010268988A CN102387580B CN 102387580 B CN102387580 B CN 102387580B CN 201010268988 A CN201010268988 A CN 201010268988A CN 102387580 B CN102387580 B CN 102387580B
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Abstract
The invention discloses the report method of power headroom reporting corresponding to a kind of carrier wave, the method comprises: subscriber equipment (UE) reports by component carrier the power headroom reporting (PHR) that each component carrier is corresponding; Wherein, report in the process of PHR, the computing formula of power climbing space (PH) value reported is:
wherein,
for UE is at component carrier c
jthe upper maximum power that can use;
for UE is at component carrier c
jthe gross power of the uplink physical channel of upper use.The invention also discloses the reporting system of power headroom reporting corresponding to a kind of carrier wave, this system comprises and reports unit, reports the PHR that each component carrier is corresponding for UE by component carrier.Adopt method and system of the present invention, total transmitting power that UE side can be avoided to calculate is more than the problem of UE maximum transmission power.
Description
Technical field
The present invention relates to and report technology, particularly relate to report method and the system of power headroom reporting (PHR, Power headroom reporting) corresponding to carrier wave under a kind of multi-carrier case.
Background technology
Along with the development of Mobile Communication Industry, constantly increase the demand of mobile data services, the requirement of people to the speed of mobile communication and service quality (Qos) is also more and more higher.Thus, before 3G (Third Generation) Moblie (3G) does not also have extensive commercialization, just start the research-and-development activity to next generation mobile communication system, wherein more typically Long Term Evolution (LTE) project that starts of third generation partner program (3GPP).The available maximum spectrum bandwidth of LTE system is 20 megahertzes (MHz).Along with the further evolution of network, introduce the Long Term Evolution (LTE-A) of evolution, it can provide the spectral bandwidth up to 100MHz as the evolution system of LTE, can support more flexible higher-quality communication, LTE system possesses good backwards compatibility simultaneously.In lte-a system, have multiple component carrier (CC, componentcarrier), a LTE terminal can only be operated on the CC of some backward compatibility, and the stronger LTE-A terminal of ability can be transmitted simultaneously on multiple CC.
In LTE R8/R9, in order to auxiliary enhancing base station (eNB, enhanced Node B) when dispatching, more reasonably carry out Physical Resource Block (PRB, Physical Resource Block) distribution, Physical Uplink Shared Channel (PUSCH, Physical Uplink Shared Channel) modulating-coding mechanism (MCS, Modulation and Coding Scheme) selection, and the adjustment of uplink power control, subscriber equipment (UE, User Equipment) side is by reporting PHR, indicate the power information that eNB also has how many residue available on carrier resource, it is defined as: maximum transmission power deducts PUSCH power.In R10, each CC has respective power adjustment, therefore in LTE-A, has reached an agreement at present PHR to be revised as report by CC, i.e. each CC, the PHR having CC corresponding reports.For supporting Physical Uplink Control Channel (PUCCH in R10, Physical Uplink Control Channel) with PUSCH transmit simultaneously time, PHR uses new type, and the maximum transmission power that namely type 2:CC is corresponding deducts PUCCH power and PUSCH power sum; And for when CC only having PUSCH transmission, the now definition of PHR is still same as the definition in R8, i.e. Class1: the maximum transmission power that CC is corresponding deducts PUSCH power.But up-link carrier polymerization time transmit simultaneously PUCCH and PUSCH can cause maximum power decline (MPR, maximumpower reduction), company is had to advise this maximum power slippage to lie in maximum transmission power corresponding to CC, namely the maximum transmission power that CC is corresponding have passed through the correction of MPR, and then PHR corresponding to CC calculated can reflect power climbing space (PH, power headroom) information more accurately.Like this, the corresponding maximum transmission power of CC is less than or equal to UE maximum transmission power, and different up CC may have the maximum transmission power that different CC is corresponding.Wherein, for the relation between described PHR and described PH, PHR is a process, can be called that UE reports PHR to the process of base station, but the particular content reported is pH value, that is, reports PHR to be in fact equivalent to report pH value, does not repeat.
To the situation of up multiple CC polymerization, when eNB goes Resources allocation by the PHR that CC is corresponding, can only ensure that the power that uses of resource that a up CC distributes is no more than UE maximum transmission power, can not ensure that the gross power that on the multiple up CC that is polymerized, institute's Resources allocation is corresponding is no more than UE maximum transmission power.Therefore, eNB, except the PHR that CC is corresponding is known in hope, also wishes the power information otherwise knowing UE current residual.If eNB does not know the power information of UE current residual, then eNB may be caused when dispatching distribution to distribute to the resource of UE improper, thus each CC causing UE side to calculate need total transmitting power of using more than the problem of UE maximum transmission power.For ensureing that total transmitting power of UE side is no more than UE maximum transmission power, UE side needs to carry out power proportions reduction continually, often does a power proportions reduction, the reliability of transfer of data all may be made to be affected, therefore, the operation of power proportions reduction will be avoided as far as possible.Visible: to distribute suitable resource to UE in order to ensure eNB, total transmitting power of UE side is made to be no more than UE maximum transmission power, except needing UE and reporting the information of power headroom on its each up CC to eNB, eNB also needs the power information knowing UE current residual.
In order to solve the problem, a solution of prior art is: during multiple up CC polymerization, on subframe i except the PHR reporting carrier wave corresponding, also need the PHR additionally reporting UE corresponding, PH (i)=P
cMAX-P
uE(i), P here
cMAXuE maximum transmission power, P
uEi () is the power sum that each physical uplink channel of up CC of all scheduling on subframe i is estimated.Here the PHR that UE is corresponding be with UE on all dispatching uplink CC use gross power to be reference point power multiple proportion, the PHR that CC is corresponding be then with UE on corresponding up CC use power to be reference point power multiple proportion.But the shortcoming adopting this solution to exist is: owing to only there being these two relative power informations, eNB is difficult to relative to the power headroom all dispatching uplink CC using gross power, retrains the resource by PHR information distribution corresponding to CC.Therefore, the PHR that UE is corresponding if use is as UE maximum transmission power bound term, then eNB also wishes to know the transmitting power of UE side on each dispatching uplink CC, and this information can effectively know have to be assessed, that is, extra UE side this information of transmitting power on each dispatching uplink CC that relies on is needed effectively to retrain, but need assessment because can this information effectively obtain, possesses uncertainty, therefore, total transmitting power that UE side still may be caused to calculate is more than the problem of UE maximum transmission power.In addition, this kind can increase signaling traffic load except the still need reporting schemes of extraneous information of pH value.
In order to solve the problem, the another kind of solution of prior art is: the pH value reported by CC, gets the pH value that CC is corresponding, the minimum value between the pH value corresponding with UE.But, the shortcoming adopting this solution to exist is: retrain by UE maximum transmission power because this reporting schemes only considers pH value to the pH value on a up CC, when there is multiple up CC polymerization, total transmitting power that UE side still may be caused to calculate is more than the problem of UE maximum transmission power.In a word, adopt the solution of above-mentioned two kinds of prior aries, total transmitting power that UE side all cannot be avoided to calculate is more than the problem of UE maximum transmission power.
Summary of the invention
In view of this, main purpose of the present invention is to provide report method and the system of the PHR that a kind of carrier wave is corresponding, and total transmitting power that UE side can be avoided to calculate is more than the problem of UE maximum transmission power.
For achieving the above object, technical scheme of the present invention is achieved in that
A report method for the power headroom reporting that carrier wave is corresponding, the method comprises: subscriber equipment (UE) reports by component carrier the power headroom reporting (PHR) that each component carrier is corresponding;
Wherein, report in the process of described PHR, the computing formula of power climbing space (PH) value reported is:
wherein,
for UE is at component carrier c
jthe upper maximum power that can use;
for UE is at component carrier c
jthe gross power of the uplink physical channel of upper use.
Wherein, described in
computing formula be:
wherein,
for component carrier c
jmaximum transmission power;
for UE maximum transmission power is at component carrier c
jthe power of upper distribution, and meet
p
uE, maxrepresent UE maximum transmission power, N represents the component carrier number of polymerization.
Wherein, described in
computing formula be:
wherein,
for UE total surplus power is at component carrier c
jthe power got.
Wherein, described in
computing formula be:
for weight coefficient.
Wherein, described in
computing formula be:
A reporting system for the power headroom reporting that carrier wave is corresponding, this system comprises: report unit, reports the PHR that each component carrier is corresponding for UE by component carrier;
Wherein, report in the process of described PHR, the computing formula of the pH value reported is:
wherein,
for UE is at component carrier c
jthe upper maximum power that can use;
for UE is at component carrier c
jthe gross power of the uplink physical channel of upper use.
Wherein, this system also comprises: computing unit, described in calculating during for calculating described PH
described
computing formula be:
wherein,
for component carrier c
jmaximum transmission power;
for UE maximum transmission power is at component carrier c
jthe power of upper distribution, and meet
p
uE, maxrepresent UE maximum transmission power, N represents the component carrier number of polymerization.
Wherein, described computing unit, is further used for described in calculating
time calculate described in
described
computing formula be:
wherein,
for UE total surplus power is at component carrier c
jthe power got.
Wherein, described computing unit, is further used for described in calculating
time calculate described in
described
computing formula be:
for weight coefficient.
Wherein, described computing unit, is further used for described in calculating
time, the computing formula of employing is:
UE of the present invention reports by component carrier the PHR that each carrier wave is corresponding; Wherein, report in the process of PHR, the computing formula of the pH value reported is:
wherein,
for UE is at component carrier c
jthe upper maximum power that can use;
for UE is at component carrier c
jthe gross power of the uplink physical channel of upper use.
Adopt the present invention, report the account form of pH value during PHR, owing to considering the restriction of UE maximum transmission power, reflect the PHR demand that eNB is corresponding to each CC in UE side, therefore, total transmitting power that UE side can not only be avoided to calculate more than the problem of UE maximum transmission power, and does not increase extra signaling consumption.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of embodiment 1 power information;
Fig. 2 is the schematic diagram of embodiment 2 power information;
Fig. 3 is the schematic diagram of embodiment 3 power information.
Embodiment
Basic thought of the present invention is: UE reports by component carrier the PHR that each component carrier is corresponding; Wherein, report in the process of PHR, the computing formula of the pH value reported is:
wherein,
for UE is at component carrier c
jthe upper maximum power that can use;
for UE is at component carrier c
jthe gross power of the uplink physical channel of upper use.
Be described in further detail below in conjunction with the enforcement of accompanying drawing to technical scheme.
The report method of the PHR that carrier wave is corresponding, mainly comprises following content:
UE reports by component carrier the PHR that each component carrier is corresponding.
Report in the process of described PHR, the computing formula of the pH value reported is:
wherein,
for UE is at component carrier c
jthe upper maximum power that can use is UE maximum transmission power P
uE, maxwith component carrier c
jmaximum transmission power
function;
for UE is at component carrier c
jthe gross power of the uplink physical channel of upper use.
Further, when the PHR that eNB is corresponding according to described each component carrier is multiple component carrier Resources allocation, make to be no more than UE maximum transmission power according to the described total transmitting power in UE side for the Resources allocation correspondence calculating of multiple component carrier institutes.
Further,
computing formula be:
wherein,
for component carrier c
jmaximum transmission power;
for UE maximum transmission power is at component carrier c
jthe power of upper distribution, and meet
p
uE, maxrepresent UE maximum transmission power, N represents the component carrier number of polymerization.
Further,
computing formula be:
wherein,
for UE total surplus power is at component carrier c
jthe power got.
Further,
computing formula be:
for weight coefficient.
Further, alternatively,
computing formula be:
Further, for back-off situation, UE side can above-mentioned
computing formula
in revise, to reflect pH value more accurately.Such as, assuming that back-off value is
then available
the value obtained is to replace above-mentioned computing formula
in value
In sum, the PHR of the first solution except reporting carrier wave corresponding of prior art, also need the power information reporting extra UE current residual, and the pH value in the PHR process reporting carrier wave corresponding calculates not science, do not consider the problem causing MPR, therefore the total transmitting power not only can not effectively avoiding UE side to calculate is more than the problem of UE maximum transmission power, thus Resources allocation cannot be avoided more than UE maximum transmission power to limit the power proportions reduction problem caused, and, the extraneous information increased needs extra cell to transmit, considerably increase signaling consumption.The PHR that the second solution of prior art reports carrier wave corresponding, pH value in the PHR process reporting carrier wave corresponding calculates not science, only consider pH value for the pH value of PHR corresponding to carrier wave to retrain by UE maximum transmission power, the total transmitting power can not effectively avoiding UE side to calculate is more than the problem of UE maximum transmission power.But, the solution of the present invention, be different from the first and the second solution of prior art, pH value in the PHR process reporting carrier wave corresponding is science, because consider the problem causing MPR in advance, and the pH value had more than for PHR corresponding to carrier wave considers pH value and retrains by UE maximum transmission power, and except the PHR reporting carrier wave corresponding, without the need to reporting extra information, the such as power information of UE current residual, therefore, under the restriction considering UE maximum transmission power, reflect the PHR demand that eNB is corresponding to each CC in UE side, total transmitting power that UE side can not only be avoided to calculate is more than the problem of UE maximum transmission power, thus can effectively avoid Resources allocation to limit the power proportions reduction problem caused more than UE maximum transmission power, and do not increase extra signaling consumption.
The solution of the present invention, is particularly useful for lte-a system, is not only applicable to situation during non-carrier polymerization, is also applicable to situation during up-link carrier polymerization.
Carry out citing to the present invention below to set forth.
In the following embodiments, weight coefficient all with
for example is described.
Embodiment 1:
Suppose that in LTE-A community, user is CC1 at the carrier wave of up use, carrierfree is polymerized, and as shown in Figure 1, supposes to exist the situation of MPR and this value has been reflected in maximum transmission power corresponding to carrier wave, wherein
value be less than UE maximum transmission power, UE power is on carrier 1 used
represent.According to the computing formula of weight coefficient, when only using a up-link carrier, now
uE total surplus power is UE total surplus power at the power that carrier wave 1 is got
the power that such UE maximum transmission power distributes on carrier 1 is:
be UE maximum transmission power, therefore, therefore have
the PHR that now carrier wave 1 reports is
report value identical with the PHR in R8/R9, therefore meet backwards compatibility.
Embodiment 2:
Suppose that in LTE-A community, user is CC1 and CC2 at the carrier wave of up polymerization, as shown in Figure 2, sets forth the power information of component carrier 1 and component carrier 2 and UE.The maximum transmission power of component carrier 1 correspondence is less than UE maximum transmission power, and the maximum transmission power of component carrier 2 correspondence is less than the maximum transmission power of component carrier 1 correspondence.
represent the power of UE at component carrier 1 and component carrier 2 respectively.The residue milliwatt power sum in this embodiment, each scheduling CC calculated according to carrier capability
be greater than the residue milliwatt power according to UE capacity calculation
further describe UE side below at known P
uE, max,
and
time, how to report the PHR on each CC.
According to P
uE, max,
uE total surplus power can be calculated:
its unit is milliwatt, equally, according to weight coefficient formula
weight coefficient can be calculated.UE total surplus power is at component carrier c
jthe power got meets
be add after the power information of unit is converted into milliwatt unit to obtain the milliwatt power that UE calculates on respective component carrier wave according to UE maximum transmission power at component carrier c again by this dBm
jthe milliwatt power of upper distribution, being converted into dBm is that the power of unit is
weight coefficient is substituted into
computing formula in, as long as the residue milliwatt power sum according to component carrier capacity calculation on each scheduling CC can be found out
be greater than the residue milliwatt power according to UE capacity calculation
namely need the maximum transmission power of power climbing space corresponding for CC according to UE ability to limit, then
all the time be less than on respective component carrier wave according to the dump power that carrier capability calculates
as shown in Figure 2,
therefore have
with
like this, the PHR CC1 and CC2 reported is respectively
Embodiment 3:
Suppose that in LTE-A community, user is CC1 and CC2 at the component carrier of up polymerization, as shown in Figure 3, this embodiment gives the situation when the residue milliwatt power sum that each scheduling CC calculates according to carrier capability is less than the residue milliwatt power according to UE capacity calculation, now meet the constraint of UE maximum transmission power, indicated by expression formula
recycling
formula, can obtain
it represents that UE total surplus power is at component carrier c
jthe milliwatt power got is greater than the component carrier c calculated according to carrier capability
jon residue milliwatt power, in other words, namely meet
like this, according to the solution of the present invention, in embodiment 3 on each CC, the PHR reported is just in time the corresponding PHR of CC calculated according to carrier capability:
The reporting system of the PHR that carrier wave is corresponding, this system comprises: report unit, reports unit to report by component carrier the PHR that each component carrier is corresponding for UE.Wherein, report in the process of PHR, the computing formula of the pH value reported is:
wherein,
for UE is at component carrier c
jthe upper maximum power that can use is UE maximum transmission power P
uE, maxwith component carrier c
jmaximum transmission power
function;
for UE is at component carrier c
jthe gross power of the uplink physical channel of upper use.
Here, this system also comprises: computing unit, calculates when computing unit is for calculating PH
computing formula be:
wherein,
for component carrier c
jmaximum transmission power;
for UE maximum transmission power is at component carrier c
jthe power of upper distribution, and meet
p
uE, maxrepresent UE maximum transmission power, N represents the component carrier number of polymerization.
Here, computing unit is further used for calculating
in time, calculates
computing formula be:
wherein,
for UE total surplus power is at component carrier c
jthe power got.
Here, computing unit is further used for calculating
in time, calculates
computing formula be:
for weight coefficient.
Here, computing unit is further used for calculating
time, the computing formula of employing is:
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (8)
1. a report method for the power headroom reporting that carrier wave is corresponding, is characterized in that, the method comprises: subscriber equipment (UE) reports by component carrier the power headroom reporting (PHR) that each component carrier is corresponding;
Wherein, report in the process of described PHR, the computing formula of power climbing space (PH) value reported is:
wherein,
for UE is at component carrier c
jthe upper maximum power that can use,
wherein,
for component carrier c
jmaximum transmission power;
for UE maximum transmission power is at component carrier c
jthe power of upper distribution, and meet
p
uE, maxrepresent UE maximum transmission power, N represents the component carrier number of polymerization;
for UE is at component carrier c
jthe gross power of the uplink physical channel of upper use.
2. method according to claim 1, is characterized in that, described in
computing formula be:
wherein,
for UE total surplus power is at component carrier c
jthe power got.
3. method according to claim 2, is characterized in that, described in
computing formula be:
for weight coefficient.
4. method according to claim 3, is characterized in that, described in
computing formula be:
5. a reporting system for the power headroom reporting that carrier wave is corresponding, is characterized in that, this system comprises: report unit, for the power headroom reporting PHR that UE reports each component carrier corresponding by component carrier;
Wherein, report in the process of described PHR, the computing formula of the power climbing space pH value reported is:
wherein,
for UE is at component carrier c
jthe upper maximum power that can use,
wherein,
for component carrier c
jmaximum transmission power;
for the power that UE maximum transmission power distributes on component carrier cj, and meet
p
uE, maxrepresent UE maximum transmission power, N represents the component carrier number of polymerization;
for UE is at component carrier c
jthe gross power of the uplink physical channel of upper use.
6. system according to claim 5, is characterized in that, described computing unit, is further used for described in calculating
time calculate described in
described
computing formula be:
wherein,
for UE total surplus power is at component carrier c
jthe power got.
7. system according to claim 6, is characterized in that, described computing unit, is further used for described in calculating
time calculate described in
described
computing formula be:
for weight coefficient.
8. system according to claim 7, is characterized in that, described computing unit, is further used for described in calculating
time, the computing formula of employing is:
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| CN101778416A (en) * | 2010-02-10 | 2010-07-14 | 中兴通讯股份有限公司 | Measuring and reporting method of power climbing space and terminal |
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| CN101715207A (en) * | 2009-11-04 | 2010-05-26 | 中兴通讯股份有限公司 | Method for measuring power headroom, method for reporting power headroom and terminal |
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