CN102006657A - Uplink power control method, device and terminal - Google Patents
Uplink power control method, device and terminal Download PDFInfo
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Abstract
The invention discloses an uplink power control method which comprises the following steps: determining uplink power regulation parameters, wherein the uplink power regulation parameters include a channel type and a power control value; and carrying the uplink power regulation parameters in an independent power control signaling in a preset format, and transmitting to the terminal so that the terminal can carry out uplink power control based on the uplink power regulation parameters. By using the invention, bits do not need to be reserved for a transmit power control (TPC) command word in each downlink control information (DCI) format, thereby reducing the consumption of physical resources.
Description
Technical field
The present invention relates to communication technical field, particularly relate to ascending power control method, device and terminal.
Background technology
In LTE (Long Term Evolution-Advanced, advanced Long Term Evolution) system, power control has descending power control and uplink power control at present, and descending power control realizes by the base station assigns mode.
Prior art is to adopt the mode of carrying TPC (Transmit Power Control, transmission power control) command field in DCI (Downlink ControlInformat ion, Downlink Control Information) to realize sending the uplink power control parameter to terminal.DCI has multiple form, DCI form 0,1 wherein, 1A, 1B, 1D, 2 or the power control of 2A all be the order that is accompanied by resource allocation, in these DCI forms, there is the TPC command field of 2 bits to be used to refer to the power control information that needs to adjust the channel correspondence, the channel type that the then corresponding indicated horsepower of different DCI forms is adjusted, terminal is learnt the form of DCI by blind check, and the corresponding channel type information of obtaining the power adjustment, and the TPC command field among the parsing DCI is controlled the respective channel power according to this power control information to obtain power control information.The prior art is the method for a kind of relative dynamic and power control timely, is applicable to the state that the UE mobility is stronger, can play and carry out the purpose that ascending power is adjusted fast.
But, the inventor finds in realizing process of the present invention, no matter whether need to carry the value that uplink power control is adjusted parameter, all can adjust the bit that parameter is reserved TPC among this DCI for uplink power control, for some power were controlled slower scene, the prior art scheme can cause waste to physical resource.
Summary of the invention
The embodiment of the invention provides ascending power control method, device and terminal, can reduce the consumption to physical resource.
For achieving the above object, the invention provides following scheme:
A kind of ascending power control method comprises:
Determine ascending power adjustment parameter, described ascending power is adjusted parameter and is comprised channel type and power control value;
Described ascending power is adjusted parameter be carried at independently in the power control signaling, send, carry out uplink power control so that described terminal is adjusted parameter according to described ascending power to terminal according to initialize format.
A kind of ascending power control method comprises:
Receive the independently power control signaling that the base station sends, described independently power control signaling is used for carrying ascending power according to initialize format and adjusts parameter, and described ascending power is adjusted parameter and comprised channel type and power control value;
Resolve described independently power control signaling, utilize described power control value, calculate the performance number that needs adjustment;
According to the performance number that described needs are adjusted, the channel indicated to described channel type carries out the power adjustment.
A kind of uplink power control device comprises:
The parameter determining unit is used for determining ascending power adjustment parameter, and described ascending power is adjusted parameter and comprised channel type and power control value;
Transmitting element is used for that described ascending power is adjusted parameter and is carried at independently power control signaling according to initialize format, sends to terminal, carries out uplink power control so that described terminal is adjusted parameter according to described ascending power.
A kind of terminal comprises:
Receiving element is used to receive the independently power control signaling that the base station sends, and described independently power control signaling is used for carrying ascending power according to initialize format and adjusts parameter, and described ascending power is adjusted parameter and comprised channel type and power control value;
Resolution unit is used to resolve described independently power control signaling, utilizes described power control value, calculates the performance number that needs adjustment;
Adjustment unit is used for the performance number according to described needs adjustment, and the channel indicated to described channel type carries out the power adjustment.
According to specific embodiment provided by the invention, the invention discloses following technique effect:
The embodiment of the invention can be determined ascending power adjustment parameter, described ascending power is adjusted parameter and is comprised channel type and power control value, described ascending power is adjusted parameter to be carried at independently in the power control signaling according to initialize format, send to terminal, so that adjusting parameter according to described ascending power, described terminal carries out uplink power control, owing to adopt independently power control signaling, the transmission frequency that power is adjusted parameter is not subjected to other control information to send the influence in cycle, do not need reserved byte, reduced consumption physical resource.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use among the embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of the method that provides of the embodiment of the invention;
Fig. 2 is the power control messages form schematic diagram that the embodiment of the invention provides;
Fig. 3 is the structural representation of MAC PDU in the prior art;
Fig. 4 is first schematic representation of apparatus that the embodiment of the invention provides;
Fig. 5 is second schematic representation of apparatus that the embodiment of the invention provides;
Fig. 6 is the 3rd schematic representation of apparatus that the embodiment of the invention provides;
Fig. 7 is the 4th schematic representation of apparatus that the embodiment of the invention provides;
Fig. 8 is the flow chart of the other method that provides of the embodiment of the invention;
Fig. 9 is the schematic diagram of the terminal that provides of the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Referring to Fig. 1, the ascending power control method that the embodiment of the invention provides may further comprise the steps:
S101: determine ascending power adjustment parameter, described ascending power is adjusted parameter and is comprised channel type and power control value;
S102: described ascending power is adjusted parameter be carried at independently in the power control signaling, send, carry out uplink power control so that described terminal is adjusted parameter according to described ascending power to terminal according to initialize format.
Need to prove that at first up channel has initial ascending power value usually, in communication process, may need ascending power is adjusted.Wherein, the initial value of ascending power value can and send to terminal by base station configuration, and the ascending power adjustment also can be initiated by the base station.For the ease of understanding, be introduced respectively below.
The base station can be that up channel is provided with initial power according to the formula that presets, wherein for different up channels, or follow the communication system of various criterion version, this formula can be different, with PUSCH (Phys ical Upl ink Shared Channel, Physical Uplink Shared Channel) be example, to PUSCH carry out uplink power control formula can for:
P
PUSCH(i)＝min{P
MAX，10log
10(M
PUSCH(i))+P
O_PUSCH(j)+α(j)·PL+Δ
TF(i)+f(i)}(1)
Wherein, each parameter-definition is as follows:
1) P
MAXBe the maximum transmission power that UE allows, can be according to the class of emission decision of UE, class of emission is broadcasted in system message.
2) M
PUSCH(i) be the size (number of Resource Block) of the PUSCH resource allocation transmitted in the subframe constantly i power adjustment.
3) P
O_PUSCH(j) by the sub-district of a 8bit exclusive normalization part P
O_NORMAL_PUSCH(j) and the exclusive P of 4 bit UE
O_UE_PUSCH(j) form.Wherein, P
O_NORMAL_PUSCH(j) by the control of RRC (Radio ResourceControl, radio resource control) signaling, j=0 and 1, scope is [126,24] dBm, precision is 1dB; P
O_UE_PUSCH(j) by the control of RRC signaling, j=0 and 1, scope is [8,7] dBm, precision is 1dB.
4) { 0,0.4,0.5,0.6,0.7,0.8,0.9,1} is the exclusive parameter in the sub-district of a 3bit to α ∈, is controlled by the rrc layer signaling.
5) PL (Path Loss, path loss) is the descending path loss of estimating in the UE side.
6) Δ
TF(i) be the exclusive Control Parameter in sub-district.
7) f (i) is i the performance number that power adjustment moment terminal need be adjusted, and the power that provides current PUSCH by f (i) is adjusted state of a control.When the control of f (i) expression integral power:
f(i)＝f(i-1)+δ
PUSCH·(i-K
PUSCH)(2)
When the non-integral power of f (i) expression is controlled:
f(i)＝δ
PUSCH·(i-K
PUSCH)(3)
Wherein, δ
PUSCHIt is the described power control value of the embodiment of the invention.K
PUSCHCan be used as terminal and carry out the indication in the cycle of power adjustment,, can avoid terminal in a power adjustment cycle, to send repeatedly power and adjust signaling by this parameter.Suppose K
PUSCH=4, can represent that then it is 4ms that terminal is carried out the cycle of ascending power adjustment, like this, within the 4ms of base station after sending the signaling of power adjustment for the first time, can transmitted power not adjust signaling.
Usually, can be according to the capabilities setting initial power of RRC signaling and known terminal.When initial condition, the P in the formula (1)
O_PUSCH(j), α (j), and P
MAXBe according to the decision of the class of emission of UE, class of emission is broadcasted in system message, therefore be known, PL calculates according to the power level that the transmitting power of base station and terminal receive, and the value of f (i) is 0 when initial power is set, according to formula (1), just can calculate the initial ascending power value of PUSCH channel like this.
The base station can receive the data that UE reports and determine whether to carry out the ascending power adjustment.The power adjustment algorithm has multiple, the algorithm that the base station can select a kind of power to adjust, and how the decision power adjustment is specifically adjusted and is based on that algorithms of different carries out.For example, whether need to adjust under the situation of power weighing with the algorithm of Block Error Rate (BLER) or bit error rate (BER), when the BLER of the data of receiving when the base station or BER increase, the wireless channel variation of terminal can have been thought in the base station, so can improve transmitting power by command terminal, otherwise, can order the base station to reduce transmitting power.
The base station is when determining the transmitting power that will adjust, and the adjusted value of this transmitting power is represented with described f (i).By formula (2), (3) as can be known, f (i) is determined by 2 parameters: δ
PUSCHAnd K
PUSCHWherein, K
PUSCHValue different according to the configuration of FDD and TDD, the respective value of regulation is arranged in agreement clearly.Such as for FDD situation, K
PUSCH=4 (certainly, because K
PUSCHIndicated the power adjustment cycle of terminal, and in embodiments of the present invention, fixedly the RN power adjustment of communicating by letter with M2M is comparatively slow, so K
PUSCHAlso can get bigger value, as 8 etc.).And the value of f (0) is 0.Therefore, the variation of f (i), perhaps the variation of the power in the formula (1) all is by δ
PUSCHCause.Usually the power control value that transmits just is meant this δ
PUSCHValue.The base station can utilize formula (2) or (3) to calculate δ at the adjusted value f (i) that determines transmitting power afterwards
PUSCH, be sent to terminal then.
UE is receiving power control value δ
PUSCHAfterwards, just can be according to power control value δ
PUSCHCalculate f (i), certainly, δ
PUSCHValue the differentiation of aggregate-value and non-aggregate-value can also be arranged, therefore, can corresponding increase definition power control value type parameter, be aggregate-value to indicate described power control value, or non-aggregate-value.Different f (i) formula of the corresponding use of different power control value types is for example as power control value type parameter indication δ
PUSCHValue be aggregate-value, and δ
PUSCH=-1 o'clock, then according to formula (2), f (1)=0+ (1) (1-4)=3dB, corresponding, terminal increases the transmitting power of 3dB on the basis of existing ascending power.
Need to prove that from formula (2) as can be seen, the calculating of f (i) may need to depend on f (i-1), promptly only under the known situation of f (i-1), just can obtain f (i).For example, carrying out for the third time power when adjusting, must be after the second time, the power adjustment was finished, under the known prerequisite of f (2), just can calculate f (3).To this, by base stations control, as mentioned before, the base station can be with reference to described K when the transmission power control signaling
PUSCHValue, for example, work as K
PUSCH=4 o'clock, then on sending once power adjust within the 4ms after the signaling transmitted power adjustment signaling more.Like this, just can guarantee that f (i-1) is known at every turn in the time need carrying out f (i).Promptly, in embodiments of the present invention, power adjustment signaling not necessarily periodically sends to the base station, but the base station is before each transmitted power adjustment information, all need at first to judge the power adjustment cycle that whether has surpassed terminal with the last power adjustment time interval constantly, if surpassed then directly transmission, otherwise, can reach the power adjustment cycle transmission more afterwards of terminal by the time with the last power adjustment time interval constantly.
As seen, the power control value that transmits is different with the performance number of terminal actual needs adjustment, and terminal can calculate the performance number that actual needs is adjusted according to formula (2) or formula (3) after receiving the power control value.
Need to prove that not all power control value all has the branch of accumulative total type and non-accumulative total type, for example, SRS (Sounding Reference Symbol surveys reference symbol) when carrying out the ascending power adjustment, is not just needed to distinguish accumulative total type and non-accumulative total type.Therefore, the base station comprises channel type and power control value when sending ascending power adjustment parameter to terminal, can also comprise power control value type in case of necessity, so that terminal selects corresponding formulas to calculate the performance number that actual needs is adjusted.
After determining that power is adjusted required parameter, in the embodiment of the invention, be described ascending power to be adjusted parameter be carried at independently in the power control signaling according to initialize format, send to terminal, the parameter has here just comprised channel type and power control value, and can also comprise power control value type where necessary.That is to say, independently carrying above-mentioned parameter in the power control signaling, terminal just can be known by power control signaling and carries out all required parameters of uplink power control like this, just can calculate the performance number of needs adjustment according to f (i) formula then.For example, suppose to carry out the power control first time, i.e. the 1st power adjustment parsed and need be carried out the information that power is adjusted to the PUSCH channel by signaling constantly the time, and value be aggregate-value-1, then bring formula (2): f (1)=f (0)+δ into
PUSCH(1-K
PUSCH), obtain: f (1)=0+ (1) (1-4)=3dB.Like this, terminal just can increase the transmitting power of 3dB on the basis of existing power.As seen, terminal receives signaling without blind check and belongs to which kind of form, therefore, has improved terminal and has carried out the efficient that power is adjusted.
Similarly, PUCCH (Physical Uplink Control Channel, Physical Uplink Control Channel) and SRS also have similar power control mechanism, and just formula is slightly different with parameter, but the control of the power of principle and PUSCH is identical, repeats no more here.
Need to prove, in the method that the embodiment of the invention provided,, therefore be applicable to usually terminal fixing or that move is at a slow speed carried out uplink power control because the bit number of power control messages is more.For example, for fixing RN (Relay Node, via node), owing to fix with the distance of the base station that is connected, and RN can be set up than higher place, so the channel quality between the base station that RN and its connected is relatively stable, and signal quality is good, do not need often RN to be carried out the power adjustment, and synchronization need to carry out the RN that power adjusts also considerably less, this uplink power control for the relative simplification that the embodiment of the invention provides provides prerequisite.In addition, at M2M (Machine to Machine, machine to machine) in the communication, fixing machine and the communication between the base station are also arranged, communicating by letter between this communication and RN and the base station is similar, also be to have relatively stable and good channel quality, so the also ascending power control method that can adopt the embodiment of the invention to provide.
Wherein, described initialize format can comprise following particular content:
(1) channel type: need identify PUSCH, PUCCH or SRS, this field can be 2 bits.Such as:
00：PUSCH；
01：PUCCH；
10：SRS；
11: reserve;
That is, be 00 if parse respective field, then can determine and need carry out the power adjustment the PUSCH channel; If 01, then can determine and need carry out the power adjustment the PUCCH channel; If 10, then can determine and need carry out the power adjustment the SRS channel.Certainly, also can adopting arbitrarily, the compound mode of other 2 bits identifies 3 different up channels.
The type of (2) power control value: need identify aggregate-value or non-aggregate-value, owing to only two kinds of situations are arranged, therefore, this field can only be 1 bit.For example:
0: aggregate-value;
1: non-aggregate-value.
That is, be 0 if parse respective field, can determine that then the type of power control value is the accumulative total type; Otherwise, if 1, the type that then can determine the power control value is non-accumulative total type.Equally, also can adopt any compound mode of other 1 bit to identify the type of 2 power control values.
Certainly, when not needing to distinguish power control value type, also can not comprise this content.
(3) power control value: need identify the power control value under the various situations, for example, for aggregate-value, performance number can be-1,0,1,3dB, and for non-aggregate-value, can be-4 ,-1,1,4dB etc.Certainly owing to the variation of power control range, the power control value can have bigger scope or more adjust step-length, can be 2 to 4 bits usually.
With 2 bits is example, can adopt 00,01,10,11 forms, and wherein, for aggregate-value, the corresponding relation of each field and power control value is:
00：-1dB；
01：0dB；
10：1dB；
11：3dB；
For non-aggregate-value, the corresponding relation of each field and power control value is:
00：-4dB；
01：-1dB；
10：1dB；
11：4dB。
Equally, also can adopt any compound mode of other 2 bits to identify the value condition of 4 kinds of power control values.
Because the power control value has positive and negative branch, therefore, also can adopt the mode of 3 bits to identify, wherein first bit be used for expression on the occasion of or negative value, for example, 0 be on the occasion of, 1 is negative value, latter two bit is used to represent the absolute value of concrete power control value.At this moment, for aggregate-value, the corresponding relation of each field and power control value can for:
101：-1dB；
000：0dB；
001：1dB；
011：3dB；
For non-aggregate-value, the corresponding relation of each field and power control value is:
111：-4dB；
101：-1dB；
001：1dB；
011：4dB。
Equally, also can adopt any compound mode of other 3 bits to identify the value condition of various power control values.
In addition, can also adopt 4 bit identification power control values, same, first bit be used for expression on the occasion of or negative value, for example, 0 be on the occasion of, 1 is negative value, back 3 bits are used to represent the absolute value of concrete power control value.At this moment, for aggregate-value, the corresponding relation of each field and power control value can for:
1001：-1dB；
0000：0dB；
0001：1dB；
0011：3dB；
For non-aggregate-value, the corresponding relation of each field and power control value is:
1100：-4dB；
1001：-1dB；
0001：1dB；
0100：3dB。
Equally, also can adopt any compound mode of other 4 bits to identify the value condition of various power control values.
In a word, when power control step number and step-length changed, the bit number of use and the mode of bits of encoded also can change.
(4) reserved place: reserve other purposes or subsequent expansion, can 1 to 2 bit, certainly, also this reserved place not.
To sum up, suppose and need carry out power control to the PUSCH channel, power control value type is 3 for accumulative total type, power control value, and the power control value adopts 3 bits to identify, then according to aforementioned coding rule, the message of carrying in same power control signaling can be 000011XX.After terminal receives this power control signaling, can parse the implication of above-mentioned coding according to identical coding rule: the power on the PUSCH channel is increased 3dB, carry out corresponding power adjustment then and get final product.
Specifically when described parameter being sent to terminal according to initialize format, can adopt multiple mode, at length introduce below by described same power control signaling.
Embodiment one: can use MAC (Medium Access Control, medium access control) layer signaling to carry out power control.That is, described ascending power can be adjusted parameter and be carried in the medium access control MAC layer signaling, at this moment, no longer carry the out of Memory except that described ascending power is adjusted parameter in this MAC signaling according to initialize format.
Concrete, new MAC control PDU (Protocol Data Unit, protocol Data Unit) can be set, perhaps MAC control IE mode realizes.Wherein, when adopting mode as MAC control PDU to realize, be equivalent to power control information is sent as an independent MAC layer signaling; When employing realizes as the mode of MAC control IE, power control information can be put on the MAC head of certain MAC PDU, at this moment, be equivalent to power control information is attached to as a field among other the MAC control PDU and send.
When sending ascending power by the way and adjusting required parameter, the form of message content can comprise CH type: channel type as shown in Figure 2; Type: power control value type; Power control: power control value; Reserved: reserve.Control in being provided with of IE at this MAC control PDU or MAC, consider the step-length and the adjusting range of actual power control, the bit number that the power control value takies may be revised, and for example, increases to 5 bits or reduces bit etc.; Owing to the adjustment of power control value, reserved place also may reduce or disappear simultaneously.
Wherein, the structure of MAC PDU comprises that MAC head (MAC header), MAC control cell (MAC Control element 1 and MAC Control element 2), MAC SDU and Padding information as shown in Figure 3.With shown in message content when realizing as the mode of MAC control IE, the power control information behind the coding can be put into MAC controlling element 1 (MAC control element1), MAC controlling element 2 positions such as (MACcontrol element2).
As shown in Figure 3, the PDU of MAC is by the MAC head, zero or a plurality of MAC service data units, zero or a plurality of MAC control elements and optionally filling form.The head of MAC PDU is made up of the son head of one or more MAC PDU, the corresponding MAC SDU of each son head or MAC control element or filling part.The son head of MAC PDU is made up of 6 territories, is respectively R/R/E/LCID/F/L, and last height head among the MAC PDU and corresponding to the MAC head of MAC controlling element has 4 header fields, R/R/E/LCID.The MAC head of corresponding filling part also comprises 4 territory R/R/E/LCID.Wherein:
R: the reserved bit position is set to 0.
E: the extended bit position is used for indicating whether to have more territory to be present in the MAC head.
LCID: logic channel id territory is used to indicate the type or the filling of corresponding MAC SDU or corresponding MAC control element.
F: the size in format field indicating length territory.For last height head of MAC PDU, the son head that perhaps corresponds to fixing MAC control element does not have F territory, F territory to account for 1 bit.When the size of MAC SDU or MAC control element during less than 128 bytes, the F territory is set to 0, otherwise is set to 1.
L: Length Indication, the MAC SDU that indication is corresponding and the size of MAC control element, unit is a byte.
Therefore, how be controlled to be example with the power of PUSCH below describes by MAC layer signaling and carries out power control:
At first, when the power on the PUSCH of base station discovery terminal is too high, the base station sends a message to terminal by MAC control PDU or MAC control IE, for example, suppose that still message content is " 000011XX ", then with this message content as a MAC control PDU independently, perhaps send to terminal as MAC control IE.According to the described coding rule of preamble, preceding two bits are represented channel type, and the 3rd bit is power control value type, and the 4th to the 6th bit is the power control value, and then this message content can be interpreted as, the 00:PUSCH channel; 0: the accumulative total type; 011:3dB.
After terminal receives described MAC control PDU or MAC control IE, can be according to identical coding rule, parse the implication of the message content of receiving: the power on the PUSCH channel is increased 3dB, and terminal is carried out corresponding power adjustment according to this implication and is got final product then.
The power control of the up channel of other types is similarly, repeats no more here.
In this embodiment one, though compared with prior art, the bit number that is used for power control increases (prior art is 2 bits) to some extent, but, owing to adopt MAC layer signaling to send, need not in the PDCCH signaling, carry the TPC command word again, do not need to reserve the TPC command word among the PDCCH yet, therefore, can not cause waste to physical layer resources.Simultaneously, the transmission frequency of power adjustment parameter is not subjected to other control information to send the influence in cycle.In addition owing to only need just can realize can reducing control to power terminal and control the blind check work of carrying out owing to power by a kind of signaling format of controlling.
Embodiment two, can use the physical layer signaling of modification to carry out uplink power control.That is, described ascending power can be adjusted parameter and be carried in the physical layer signaling, at this moment, no longer carry the out of Memory except that described ascending power is adjusted parameter in the described physical layer signaling according to initialize format.
Under this embodiment, also can use PDCCH physical channel transmission power control information, what but prior art was different is: removed the form of the PDCCH of some power controls in the prior art, such as the power control format of following scheduling of resource, DCI form 3 and DCI form 3A are merged, realize the indication of non-scheduling resource.Promptly no longer there is multiple DCI form, only changes into by a kind of and control the transmission that signaling format is realized power control information.
In the prior art, among the DCI form 3/3A of PDCCH, the control of the power of a plurality of terminals is specified and all is put in the signaling of a PDCCH, and each terminal takies 2 bits or 1 bit.But, under the scene of RN or M2M communication, because the cycle request of power control is long, so can all reserve 1 or 2 bits for each terminal, and the number of terminals of carrying out power control on the same moment may be fewer, therefore, and in the power control signaling of PDCCH, can only be a few reserved bit position, base station, and the bit number that can distribute to a terminal can increase to some extent.
Think that 8 bits of a terminal distribution are example, concrete message format can be as shown in Figure 2, and wherein, preceding 2 bits can be represented channel type, such as PUSCH, and PUCCH or SRS; Next 1 bit can identify the type of power control value, as accumulative total type or non-accumulative total type; Next 3 bits can identify the power control value of adjustment again; Last 2 bits are reserved.Certainly, if do not think the reserved bit position, on physical channel, can reserve 6 or bit still less so.
Need to prove that DCI form 3/3A only indicates the integral power controlled quentity controlled variable, and only controls the power control word on PUSCH and the PUCCH as replenishing that the power of following schedule information is controlled in the prior art.And in the specific embodiment of the invention two, owing to do not follow the power control indication information of scheduling of resource, so need the power control information of the channel of the more required power adjustment of indication, and power control information of indication accumulative total type and non-accumulative total type.So, need more indication bit number for each RN or machine.
In this embodiment two, though still need to carry out uplink power control by the PDCCH channel of physical layer, but since no longer need be in every kind of DCI form all reserve 2 bits for the TPC command word, nor with being all reserved bit positions of all terminals simultaneously, therefore, reduced waste to physical resource; Simultaneously, the transmission frequency of power adjustment parameter is not subjected to other control information to send the influence in cycle.In addition, owing on physical channel, only need just can realize therefore, can reducing control to power terminal and control the blind check work of carrying out owing to power by a kind of signaling format of controlling.
Embodiment three, carry out power control by the RRC signaling.That is, described ascending power can be adjusted parameter and be carried in the rrc layer signaling, be not used in the out of Memory that carries except that described ascending power is adjusted parameter in the described rrc layer signaling according to initialize format.
This embodiment three times, can be at uplink power control IE (information element, cell) in, increase is to the definition of the power control of terminal, because rrc layer belongs to upper-layer protocol, so the definition of message format can be flexible relatively, can use binary representation, such as, for various situations, can directly be defined as follows:
The power control value enumerated value of PUSCH accumulative total 1,0,1,3}
The absolute power controlling value enumerated value of PUSCH 4 ,-1,1,4}
Enable integral power value Boolean
The power control value enumerated value of PUCCH 1,0,1,3}
Need to prove, if, then when signaling is delivered to lower floor, may also can be converted into binary form with adopting above-mentioned message format, but irrelevant with the specific implementation of the embodiment of the invention, therefore no longer this is given unnecessary details.
Certainly, when carrying out power control by the RRC signaling, concrete message format also can be as shown in Figure 2, and wherein, preceding 2 bits can be represented channel type, such as PUSCH, and PUCCH or SRS; Next 1 bit can identify the type of power control value, as accumulative total type or non-accumulative total type; Next 3 bits can identify the power control value of adjustment again; Last 2 bits are reserved.
This power control cell can be put in the system message or in the special RRC signaling and carry, such as, can be put in the physical channel reconfiguration message; Perhaps, also can be put into RRC connects in the reconfiguration message; Perhaps, can also be put in the foundation of RRC resource, modification or the release message; In addition, can also be put in the relevant signaling of mobility.
Certainly in this cell, carry out the channel of power control and may expand, such as the power control value of data channel, the power control value of signaling channel etc., concrete enumerated value also may expand according to the value of actual adjustment etc. to some extent.Use the RRC signaling to carry out power control and with the RRC signaling the dissimilar power control value of different channels is informed terminal exactly.
Use the method for this embodiment three,, need not in the PDCCH signaling, carry the TPC command word again, also do not need to reserve the TPC command word among the PDCCH, therefore, can not cause waste physical layer resources owing to adopt the RRC signaling to send.Simultaneously, the transmission frequency of power adjustment parameter is not subjected to other control information to send the influence in cycle.In addition owing to only need just can realize can reducing control to power terminal and control the blind check work of carrying out owing to power by a kind of signaling format of controlling.
Need to prove, when sending the power control messages of initialize format by MAC layer signaling, physical layer PDCCH or RRC signaling, can be according to the method for each layer protocol regulation to preliminary treatment such as described message encapsulate, and then send, concrete method repeats no more here.
Corresponding with the method that the embodiment of the invention provides, the embodiment of the invention also provides a kind of device of uplink power control, and referring to Fig. 4, this device is positioned at the base station, comprising:
Parameter determining unit U401 is used for determining ascending power adjustment parameter, and described ascending power is adjusted parameter and comprised channel type and power control value;
Transmitting element U402 is used for that described ascending power is adjusted parameter and is carried at independently power control signaling according to initialize format, sends to terminal, carries out uplink power control so that described terminal is adjusted parameter according to described ascending power.
In the device that the embodiment of the invention provides, parameter determining unit U401 is after determining that ascending power is adjusted required parameter, transmitting element U402 can adjust described ascending power parameter and be carried at independently in the power control signaling according to initialize format, send to terminal, carry out uplink power control so that described terminal is adjusted parameter according to described ascending power.Owing to just can realize control to ascending power by the control of power independently signaling, therefore, can all TPC command word reserved bit position in every kind of DCI form, reduced consumption to physical resource.Simultaneously, the transmission frequency of power adjustment parameter is not subjected to other control information to send the influence in cycle.
Wherein, referring to Fig. 5, transmitting element U402 can comprise:
First sends subelement U4021, is used for that described ascending power is adjusted parameter and is carried at medium access control MAC layer signaling according to initialize format, and described MAC layer signaling is not used in the out of Memory that carries except that described ascending power is adjusted parameter.
At this moment, first sends subelement U4021 specifically can be used for described ascending power adjustment parameter is carried at MAC control protocol data cell PDU according to initialize format, perhaps among the control IE of MAC, sends to terminal.
Under this mode, owing to adopt MAC layer signaling to send, need not in the PDCCH signaling, carry the TPC command word again, do not need to reserve the TPC command word among the PDCCH yet, therefore, can not cause waste to physical layer resources.In addition owing to only need just can realize can reducing control to power terminal and control the blind check work of carrying out owing to power by a kind of signaling format of controlling.
Referring to Fig. 6, transmitting element U402 also can comprise:
Second sends subelement U4022, is used for that described ascending power is adjusted parameter and is carried at physical layer signaling according to initialize format, and described physical layer signaling is not used in the out of Memory that carries except that described ascending power is adjusted parameter.
Under this mode and since no longer need be in every kind of DCI form all reserve 2 bits for the TPC command word, nor, therefore, reduced waste to physical resource with being all reserved bit positions of all terminals simultaneously; Simultaneously, the transmission frequency of power adjustment parameter is not subjected to other control information to send the influence in cycle.In addition, owing on physical channel, only need just can realize therefore, can reducing control to power terminal and control the blind check work of carrying out owing to power by a kind of signaling format of controlling.
Referring to Fig. 7, transmitting element U402 can also comprise:
The 3rd sends subelement U4023, is used for that described ascending power is adjusted parameter and is carried at radio resource control rrc layer signaling according to initialize format, and described rrc layer signaling is not used in the out of Memory that carries except that described ascending power is adjusted parameter.
Wherein, the 3rd sends subelement U4023 specifically can be used for described ascending power adjustment parameter is carried in system message or the special RRC signaling according to initialize format, sends to terminal.
Under this mode, owing to adopt the RRC signaling to send, need not in the PDCCH signaling, carry the TPC command word again, do not need to reserve the TPC command word among the PDCCH yet, therefore, can not cause waste to physical layer resources.Simultaneously, the transmission frequency of power adjustment parameter is not subjected to other control information to send the influence in cycle.In addition owing to only need just can realize can reducing control to power terminal and control the blind check work of carrying out owing to power by a kind of signaling format of controlling.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in the computer read/write memory medium, this program is when carrying out, comprise the steps: to determine ascending power adjustment parameter, described ascending power is adjusted parameter and is comprised channel type and power control value; Described ascending power is adjusted parameter be carried at independently in the power control signaling, send, carry out uplink power control so that described terminal is adjusted parameter according to described ascending power to terminal according to initialize format.Described storage medium, as: ROM/RAM, magnetic disc, CD etc.
Accordingly, the embodiment of the invention also provides another kind of ascending power control method, and this method is used for terminal and carries out power control, and referring to Fig. 8, this method comprises:
S801: receive the independently power control signaling that the base station sends, described independently power control signaling is used for carrying ascending power according to initialize format and adjusts parameter, and described ascending power is adjusted parameter and comprised channel type and power control value;
S802: resolve described independently power control signaling, utilize described power control value, calculate the performance number that needs adjustment;
S803: according to the performance number that described needs are adjusted, the channel indicated to described channel type carries out the power adjustment.
The timesharing that has aggregate-value and non-aggregate-value when the power control value, described ascending power is adjusted parameter can also comprise power control value type, at this moment, resolves described independently power control signaling, utilize described power control value and described power control value type, calculate the performance number that needs adjustment.
Owing to just can realize control by power control signaling independently in the embodiment of the invention to ascending power, therefore, can all TPC command word reserved bit position in every kind of DCI form, reduced consumption to physical resource.Simultaneously, the transmission frequency of power adjustment parameter is not subjected to other control information to send the influence in cycle.
Accordingly, the embodiment of the invention also provides a kind of terminal, and referring to Fig. 9, this terminal comprises:
Receiving element U901 is used to receive the independently power control signaling that the base station sends, and described independently power control signaling is used for carrying ascending power according to initialize format and adjusts parameter, and described ascending power is adjusted parameter and comprised channel type and power control value;
Resolution unit U902 is used to resolve described independently power control signaling, utilizes described power control value, calculates the performance number that needs adjustment;
Adjustment unit U903 is used for the performance number according to described needs adjustment, and the channel indicated to described channel type carries out the power adjustment.
Wherein, described ascending power is adjusted parameter can also comprise power control value type, and resolution unit U902 specifically is used to resolve described independently power control signaling, utilizes described power control value and described power control value type, calculates the performance number that needs adjustment.
Owing to just can realize control by power control signaling independently in the embodiment of the invention to ascending power, therefore, can all TPC command word reserved bit position in every kind of DCI form, reduced consumption to physical resource.Simultaneously, the transmission frequency of power adjustment parameter is not subjected to other control information to send the influence in cycle.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in the computer read/write memory medium, this program is when carrying out, comprise the steps: to receive the independently power control signaling that the base station sends, described independently power control signaling is used for carrying ascending power according to initialize format and adjusts parameter, and described ascending power is adjusted parameter and comprised channel type and power control value; Resolve described independently power control signaling, utilize described power control value, calculate the performance number that needs adjustment; According to the performance number that described needs are adjusted, the channel indicated to described channel type carries out the power adjustment.Described storage medium, as: ROM/RAM, magnetic disc, CD etc.
The method that provides with the embodiment of the invention and install correspondingly, the embodiment of the invention also provides a kind of signaling, and referring to Fig. 2, this signaling comprises:
First parameter is used to indicate channel type, so that terminal determines that according to this indication needs carry out the object that power is adjusted;
Second parameter is used to indicate power control value type, so that terminal is identified for the formula of rated output adjusted value according to this indication;
The 3rd parameter is used to indicate the power control value, so that terminal is calculated power adjustment according to this indication.
Wherein, because in some cases, the power control value does not need to distinguish accumulative total type and non-accumulative total type, therefore, does not just need to transmit this parameter of power control value type to terminal, and therefore, described second parameter is optional.
More than to ascending power control method provided by the present invention, device and terminal, be described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, part in specific embodiments and applications all can change.In sum, this description should not be construed as limitation of the present invention.
Claims (17)
1. an ascending power control method is characterized in that, comprising:
Determine ascending power adjustment parameter, described ascending power is adjusted parameter and is comprised channel type and power control value;
Described ascending power is adjusted parameter be carried at independently in the power control signaling, send, carry out uplink power control so that described terminal is adjusted parameter according to described ascending power to terminal according to initialize format.
2. method according to claim 1 is characterized in that, described ascending power is adjusted parameter and also comprised power control value type.
3. method according to claim 1 is characterized in that, described described ascending power adjustment parameter is carried at independently according to initialize format comprises in the power control signaling:
Described ascending power is adjusted parameter be carried in the medium access control MAC layer signaling according to initialize format, described MAC layer signaling is not used in the out of Memory that carries except that described ascending power is adjusted parameter.
4. method according to claim 3 is characterized in that, described described ascending power adjustment parameter is carried in the medium access control MAC layer signaling according to initialize format comprises:
Described ascending power is adjusted parameter be carried among the MAC control protocol data cell PDU, perhaps among the control IE of MAC according to initialize format.
5. method according to claim 1 is characterized in that, described described ascending power adjustment parameter is carried at independently according to initialize format comprises in the power control signaling:
Described ascending power is adjusted parameter be carried in the physical layer signaling according to initialize format, described physical layer signaling is not used in the out of Memory that carries except that described ascending power is adjusted parameter.
6. method according to claim 1 is characterized in that, described described ascending power adjustment parameter is carried at independently according to initialize format comprises in the power control signaling:
Described ascending power is adjusted parameter be carried in the radio resource control rrc layer signaling according to initialize format, described rrc layer signaling is not used in the out of Memory that carries except that described ascending power is adjusted parameter.
7. method according to claim 6 is characterized in that, described described ascending power adjustment parameter is carried in the radio resource control rrc layer signaling according to initialize format comprises:
With described ascending power adjust parameter be carried in the system message according to initialize format or the special RRC signaling in.
8. an ascending power control method is characterized in that, comprising:
Receive the independently power control signaling that the base station sends, described independently power control signaling is used for carrying ascending power according to initialize format and adjusts parameter, and described ascending power is adjusted parameter and comprised channel type and power control value;
Resolve described independently power control signaling, utilize described power control value, calculate the performance number that needs adjustment;
According to the performance number that described needs are adjusted, the channel indicated to described channel type carries out the power adjustment.
9. method according to claim 8 is characterized in that, described ascending power is adjusted parameter and also comprised power control value type,
The described independently power control of described parsing signaling is utilized described power control value, calculates the performance number that needs adjustment, is specially:
Resolve described independently power control signaling, utilize described power control value and described power control value type, calculate the performance number that needs adjustment.
10. a uplink power control device is characterized in that, comprising:
The parameter determining unit is used for determining ascending power adjustment parameter, and described ascending power is adjusted parameter and comprised channel type and power control value;
Transmitting element is used for that described ascending power is adjusted parameter and is carried at independently power control signaling according to initialize format, sends to terminal, carries out uplink power control so that described terminal is adjusted parameter according to described ascending power.
11. device according to claim 10 is characterized in that, described transmitting element comprises:
First sends subelement, is used for that described ascending power is adjusted parameter and is carried at medium access control MAC layer signaling according to initialize format, and described MAC layer signaling is not used in the out of Memory that carries except that described ascending power is adjusted parameter.
12. device according to claim 11, it is characterized in that, described first sends subelement specifically is used for described ascending power adjustment parameter is carried at MAC control protocol data cell PDU according to initialize format, perhaps among the control IE of MAC, sends to terminal.
13. device according to claim 10 is characterized in that, described transmitting element comprises:
Second sends subelement, is used for that described ascending power is adjusted parameter and is carried at physical layer signaling according to initialize format, and described physical layer signaling is not used in the out of Memory that carries except that described ascending power is adjusted parameter.
14. device according to claim 10 is characterized in that, described transmitting element comprises:
The 3rd sends subelement, is used for that described ascending power is adjusted parameter and is carried at radio resource control rrc layer signaling according to initialize format, and described rrc layer signaling is not used in the out of Memory that carries except that described ascending power is adjusted parameter.
15. device according to claim 14 is characterized in that, the described the 3rd sends subelement specifically is used for described ascending power adjustment parameter is carried in system message or the special RRC signaling according to initialize format, sends to terminal.
16. a terminal is characterized in that, comprising:
Receiving element is used to receive the independently power control signaling that the base station sends, and described independently power control signaling is used for carrying ascending power according to initialize format and adjusts parameter, and described ascending power is adjusted parameter and comprised channel type and power control value;
Resolution unit is used to resolve described independently power control signaling, utilizes described power control value, calculates the performance number that needs adjustment;
Adjustment unit is used for the performance number according to described needs adjustment, and the channel indicated to described channel type carries out the power adjustment.
17. terminal according to claim 16, it is characterized in that described ascending power is adjusted parameter and also comprised power control value type, described resolution unit specifically is used to resolve described independently power control signaling, utilize described power control value and described power control value type, calculate the performance number that needs adjustment.
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