CN101895976B - LTE-Advanced system-based uplink power adjustment method - Google Patents
LTE-Advanced system-based uplink power adjustment method Download PDFInfo
- Publication number
- CN101895976B CN101895976B CN2010102351409A CN201010235140A CN101895976B CN 101895976 B CN101895976 B CN 101895976B CN 2010102351409 A CN2010102351409 A CN 2010102351409A CN 201010235140 A CN201010235140 A CN 201010235140A CN 101895976 B CN101895976 B CN 101895976B
- Authority
- CN
- China
- Prior art keywords
- power
- tpc
- subcarrier
- pucch
- pusch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- Y02B60/50—
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides an uplink power adjustment method, which is applied to an LTE-Advanced system adopting a frequency spectrum polymerization technology and belongs to a resource distribution part of uplink subcarrier power. The invention mainly comprises the following steps: firstly, calculating out the TPC initial power PPUSCH, k and PPUCCH, K of PUSCH and PUCCH in accordance with an uplinkpower control formula and judging weather the TPC initial power values meet the limited conditions of maximum transmitting power; and if the result is not qualified with the conditions, carrying out the following steps: adopting a two-classification method or an N-classification method to classify the subcarriers, allocating and adjusting collective adjustment power of offset to the maximum priority and judging whether the adjusting result meets the limited power of the minimum transmitting power. The invention takes the numerical difference of the TPC initial results and the TPC former powerto reduce the power, thereby taking into account of the losses of throughput to the extent; the invention considers the minimum transmitting power values of the subcarriers, ensures transmission of PUCCH data and indirectly guarantees utilization rate of the frequency spectrum. The invention is no need of extra control signaling overhead and has simple algorithm, short arithmetic time delay and easy realization.
Description
Technical field
The present invention is applied to adopt in the LTE-Advanced system of spectrum aggregating technology, belongs to uplink sub-carrier power resource allocation part.
Background technology
System's minimum bandwidth of LTE-A (Long Term Evolution-Advanced, LTE-A) system's support is 20MHz, and maximum bandwidth reaches 100MHz.Consider existing spectrum allocation may mode and planning, in order to support the requirement of so large bandwidth, 3GPP has proposed the demand of employing spectrum aggregating (spectrum aggregation, SA) technology solution band resource.Spectrum aggregating is the technology that a plurality of continuous or discrete LTE carrier extend can be become the transmission carrier wave of LTE-A system.
The uplink power control of employing SA technology and Release's ' 8 is similar in the LTE-Advanced system, with reference to " 3GPP Long Term Evolution (LTE) know-why and system ", Shen Jia, ppll1-113, calculate respectively subcarrier (component carrier according to formula (1) and (2), CC) PUSCH and the power of PUCCH
P
PUSCH,k=10·log
10M
PUSCH(k)+P
0_PUSCH(k)+α(k)·PL(k)+Δ
TF(k)+f(k)(1)
P
PUCCH,k=P
0_PUCCH(k)+PL(k)+h(·)+Δ
F_PUCCH(·)+g(k)(2)
(1) in, k is the label of CC, M
PUSCHThe resource block number of PUSCH, P
0_PUSCHBe the specific or specific parameter of UE in residential quarter, α is the specific path compensation coefficient in residential quarter, and PL is the path fading loss value of down-run survey, Δ
TFBe the parameter for certain specific MCS (modulation coding mode) of rrc layer appointment, f is the function relevant with residential quarter specific transmitting power Control loop correction factor by high level control.
(2) in, P
0_PUCCHBe the specific or specific parameter of UE in residential quarter, PL is the path fading loss value of down-run survey, and h is the PUCCH format parameter, Δ
F_PUCCHBe the parameter of rrc layer appointment, g is the function relevant with residential quarter specific transmitting power Control loop correction factor by high level control.
Can find out that from formula these parameters are closed loop and open Loop Power control parameter, are jointly determined by base station and UE.
UE has fixing maximum transmission power according to the grade of its cell allocation, i.e. the result of power control must satisfy formula (3):
Wherein, P
MAXMaximum transmission power for UE.
When adopting the SA technology, be that a plurality of CC are when being simultaneously UE service, CC carries out respectively uplink transmission power control (transmission power control according to power contorl parameters separately, TPC) calculate, the power initial value that obtains may not satisfy the maximum transmission power requirement, need to carry out the power adjustment this moment, namely reduces the TPC initial power.
Document R1-100201, " ULPC:Simultaneous transmission of PUCCH and PUSCHin case of power limitation ", Motorola, January 2010, power regulating method is summarized as three classes: CC equivalent is adjusted, and the CC classification is adjusted and the physical channel classification is adjusted.Wherein the amount adjustment method such as CC refers to that all CC reduce power with same offset, owing to do not consider the characteristic of CC, the CC of high spectral efficiency is reduced identical power can cause larger loss of throughput.Document R1-093395, " ULTransmission Power Control in LTE-A; " Samsung, 2009, certain parameter of the CC that gives chapter and verse simultaneously is such as modulation coding mode (Modulation and Coding Scheme, MCS) carry out the method that power is adjusted, in theory can maximize throughput, but algorithm complex is high, and time delay higher to the requirement of UE and that cause is larger.In addition, two kinds of methods are not all considered the minimum emissive power of CC.
Summary of the invention
The initial power of up TPC does not satisfy the problem of UE restriction when the present invention is directed to LTE-Advanced system employing carrier aggregation technology, has proposed a kind of power regulating method of taking into account performance and complexity.
The technical scheme that the present invention takes is:
A kind of uplink power adjustment method for the LTE-Advanced system may further comprise the steps:
P
PUCCH,k=P
0_PUCCH(k)+PL(k)+h(·)+Δ
F_PUCCH(·)+g(k)
P
PUSCH,k=10·log
10M
PUSCH(k)+P
0_PUSCH(k)+α(k)·PL(k)+Δ
TF(k)+f(k);
Step 2 judges whether the TPC initial power satisfies the maximum transmit power limit condition, if satisfy, namely
Then jump directly to step 7; Otherwise enter step 3; Wherein k is the label of subcarrier, and K is the number of subcarrier,
Be the TPC initial power of subcarrier k, P
MAXMaximum transmission power for UE;
Step 3, the priority of adjustment is determined in classification to subcarrier;
And be made as the priority of adjusted subcarrier minimum; Δ wherein
kFor subcarrier k is CC
kSide-play amount, Δ
kPower/M that=needs are adjusted, M are limit priority set sub-carriers number;
Described step 3 sub-carriers classification is divided into two class methods and N class method according to nicety of grading;
Two class methods according to TPC initial power and TPC before the positive and negative of numerical difference between of transmitting power subcarrier is divided into two classes, selecting the non-positive subcarrier of numerical value be the object of preferential adjustment;
N class method according to TPC initial power and TPC before the magnitude classification of difference of transmitting power, from the minus tolerance to the principal-employment, subcarrier is divided into the N level, wherein N is less than or equal to the number of subcarrier, progression N is more, it is meticulousr to classify; Numerical difference between is less, and the category label that is included into is less, and the priority of adjustment is higher.
The Offset method of frequency measurements such as method of adjustment employing of side-play amount in the described step 5, namely other subcarrier of same class distributes identical adjustment side-play amount.
Advantage of the present invention and good effect are as follows:
Sort module of the present invention with the TPC initial result of CC and TPC before the numerical difference between of power as the CC feature, the state of description CC that can be simple and comprehensive.
2. the present invention considers the CC feature, and namely the numerical difference between of power can to a certain degree be taken into account the loss of throughput as according to reducing power before TPC initial result and the TPC.
3. the present invention has considered the minimum emissive power value of CC, has guaranteed the PUCCH data transfer, has indirectly guaranteed the availability of frequency spectrum.
4. algorithm does not need extra control signal expense.
5. algorithm is simple, and arithmetic time delay is short, is easy to realize.
Description of drawings
Fig. 1 is the inventive method schematic flow sheet;
Fig. 2 be CC equivalent adjust the algorithm after method and the present invention's simplification throughput ratio.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further.
1. sort module
Sort module is selected the CC of preferential Modulating Power.Criteria for classification is the numerical difference between of transmitting power before TPC initial power and the TPC.Up TPC is by cell-specific parameters or UE special parameter, path loss, Resources allocation block size, MCS and Closed-cycle correction function etc. are common determines, so this module TPC structure CC characteristic.The transmitting power numerical difference between illustrates that for just the front underpower of TPC to support this transmission, requires it to increase power before TPC initial power and TPC; Otherwise, illustrate that the power before the TPC has surplus capacity, can reduce or keep power.Adjustment strategy of the present invention is the demand of As soon as possible Promising Policy CC increasing power, and namely the preferential CC that has power to have more than needed that selects adjusts.Be divided into two class methods and N class method according to nicety of grading.
Two class methods according to TPC initial power and TPC before the positive and negative of numerical difference between of transmitting power CC is divided into two classes, selecting the non-positive CC of numerical value be the object of preferential adjustment.
N class method according to TPC initial power and TPC before the magnitude classification of difference of transmitting power, from the minus tolerance to the principal-employment, CC is divided into the N level, wherein N is less than or equal to the number of CC.Progression N is more, and it is meticulousr to classify.Numerical difference between is less, and the category label that is included into is less, and the priority of adjustment is higher.
2. adjusting module
The CC that adjusting module is selected the sort module result distributes the adjustment side-play amount, thereby target is to reduce the TPC initial power with different coefficients to make final transmitting power satisfy maximum transmit power limit.The Offset method of frequency measurements such as adjustment algorithm employing, namely other CC of same class distributes identical adjustment side-play amount.
3. minimum power limits module
In order to guarantee that uplink control signaling correctly transmits, definition CC
kMinimum emissive power be ε
k, ε
k=P
PUCCH, kWhether the result after the adjustment of minimum power limits module verification satisfies the minimum power confined condition, satisfied then finish the power adjustment process, otherwise returns adjusting module, until satisfy simultaneously maximum, minimum emissive power restrictive condition.
Detailed process
The uplink power control detailed process is as follows, and flow chart is seen Fig. 1.
Step 2 judges whether the TPC initial power satisfies the maximum transmit power limit condition.If satisfy, namely
Wherein k is the label of CC, and K is the number of CC,
Be CC
kThe TPC initial power, P
MAXMaximum transmission power for UE.Jump directly to step 7; Otherwise, enter step 3.
Step 3, priority (sort module) the selection two class methods of adjustment are determined in classification to CC, go to step 3.1; Select N class method, go to step 3.2.
Step 3.1, (two class methods) be TPC initial power and TPC transmitting power before relatively, and CC is divided into two classes,
Be classified as preferential adjustment classification,
Be classified as secondary adjustment classification.
Step 3.2, (N class method) be TPC initial power and TPC transmitting power before relatively,
According to ascending arrangement
Determine CC
kAdjustment order, minimum
Be classified as label and be 1 set, maximum
Be classified as the set that label is N.The span of N is [1, K].
Simultaneously, with adjusted CC
kPriority be made as minimum.
Step 6.1 is judged and is adjusted the result
Whether satisfy the minimum emissive power restriction.If satisfy, namely
Then go to step 7; Otherwise, go to step 6.2.
Step 6.2 is its minimum emissive power with the power setting of not satisfying the CC of minimum emissive power restriction, forwards step 4 to.
Emulation shown in Figure 2 be CC equivalent adjust the algorithm after method and the present invention's simplification throughput ratio.Method 1 among the figure is adjusted method for CC equivalent, and namely when the TPC of UE initial result did not satisfy maximum transmission power, all CC distributed the adjustment amount that equates.Method 2 is the algorithm that the present invention simplifies, adopt the classification of two class methods and etc. the side-play amount adjustment.Suppose that the power before TPC is the maximum power that UE allows, the power behind the TPC compares with it.The minimum power limits value of supposing CC is fixed constant.The distribution of transmitting power all be theoretical at random.
As can be seen from the figure, in the situation of different CC numbers, the average throughput of method 2 always is higher than method 1, i.e. the performance loss that causes of method 1 is larger.
Claims (3)
1. uplink power adjustment method based on the LTE-Advanced system is characterized in that comprising:
Step 1 calculates the PUCCH of subcarrier and the TPC initial power P of PUSCH
PUCCH, kAnd P
PUSCH, k
Step 2 judges whether the TPC initial power satisfies the maximum transmit power limit condition, if satisfy, namely
Then jump directly to step 7; Otherwise enter step 3; Wherein k is the label of subcarrier, and K is the number of subcarrier,
Be the TPC initial power of subcarrier k, P
MAXMaximum transmission power for UE;
Step 3, the priority of adjustment is determined in classification to subcarrier;
Step 5 is adjusted side-play amount according to the classification results distribution of step 3, the power after obtaining to adjust
And be made as the priority of adjusted subcarrier minimum; Δ wherein
kFor subcarrier k is CC
kSide-play amount, Δ
kPower/M that=needs are adjusted, M are limit priority set sub-carriers number;
Step 6, definition minimum emissive power ε
k, ε
k=P
PUCCH, k, judge the power after adjusting
Whether satisfy the minimum emissive power restriction, if satisfy, namely
Then go to step 7; Otherwise, be its minimum emissive power with the power setting of not satisfying the subcarrier of minimum emissive power restriction, go to step 4.
The described subcarrier classification criterion of step 3 nicety of grading is divided into two class methods and N class method;
Two class methods according to TPC initial power and TPC before the positive and negative of numerical difference between of transmitting power subcarrier is divided into two classes, selecting the non-positive subcarrier of numerical value be the object of preferential adjustment;
N class method according to TPC initial power and TPC before the magnitude classification of difference of transmitting power, from the minus tolerance to the principal-employment, subcarrier is divided into the N level, wherein N is less than or equal to the number of subcarrier, progression N is more, it is meticulousr to classify; Numerical difference between is less, and the category label that is included into is less, and the priority of adjustment is higher.
2. described a kind of uplink power adjustment method based on the LTE-Advanced system according to claim 1, it is characterized in that: the TPC initial power of the PUCCH of step 1 sub-carriers and PUSCH calculates according to following formula:
P
PUCCH,k=P
0_PUCCH(k)+PL(k)+h(·)+Δ
F_PUCCH(·)+g(k)
P
PUSCH,k=10·log
10M
PUSCH(k)+P
0_PUSCH(k)+α(k)·PL(k)+Δ
TF(k)+f(k)
Wherein, k is the label of subcarrier, M
PUSCHThe resource block number of PUSCH, P
0_PUSCHBe the specific or specific parameter of UE in residential quarter, α is the specific path compensation coefficient in residential quarter, and PL is the path fading loss value of down-run survey, Δ
TFBe the parameter for certain specific modulation coded system of rrc layer appointment, f is that h is the PUCCH format parameter, Δ by the function relevant with residential quarter specific transmitting power Control loop correction factor of high level control
F_PUCCHBe the parameter of rrc layer appointment, g is the function relevant with residential quarter specific transmitting power Control loop correction factor by high level control.
3. described a kind of uplink power adjustment method based on the LTE-Advanced system according to claim 1, it is characterized in that: the Offset method of frequency measurements such as the method for adjustment employing of the described side-play amount of step 5, namely other subcarrier of same class distributes identical adjustment side-play amount.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010102351409A CN101895976B (en) | 2010-07-21 | 2010-07-21 | LTE-Advanced system-based uplink power adjustment method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010102351409A CN101895976B (en) | 2010-07-21 | 2010-07-21 | LTE-Advanced system-based uplink power adjustment method |
Publications (2)
Publication Number | Publication Date |
---|---|
CN101895976A CN101895976A (en) | 2010-11-24 |
CN101895976B true CN101895976B (en) | 2013-10-23 |
Family
ID=43104995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2010102351409A Expired - Fee Related CN101895976B (en) | 2010-07-21 | 2010-07-21 | LTE-Advanced system-based uplink power adjustment method |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN101895976B (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101877906B (en) * | 2010-05-19 | 2015-08-12 | 中兴通讯股份有限公司 | The collocation method of transmitting power and device |
CN102076072B (en) * | 2010-12-31 | 2013-10-09 | 北京邮电大学 | Uplink power control method, user equipment (UE) and carrier aggregation (CA) system |
CN102300305B (en) * | 2011-09-23 | 2013-09-04 | 电信科学技术研究院 | Method and device for controlling uplink power |
CN110225580A (en) * | 2012-08-13 | 2019-09-10 | 夏普株式会社 | Wireless communication device, wireless communications method, program and integrated circuit |
CN103686926A (en) * | 2012-09-11 | 2014-03-26 | 普天信息技术研究院有限公司 | Acceptance judgment method for uplink bearer request |
JP2015080066A (en) * | 2013-10-16 | 2015-04-23 | 株式会社Nttドコモ | Mobile communication system |
CN104837189B (en) * | 2015-04-20 | 2019-03-01 | 天津大学 | A kind of close-loop power control modification method based on lte-a system |
WO2016179806A1 (en) * | 2015-05-13 | 2016-11-17 | 华为技术有限公司 | Power control method, terminal and base station |
CN115915369A (en) * | 2021-09-30 | 2023-04-04 | 大唐移动通信设备有限公司 | PUCCH power control method, terminal, device and storage medium |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1866774A (en) * | 2005-05-16 | 2006-11-22 | 上海华为技术有限公司 | Method for carrying out power control on forward access channel |
CN1893305A (en) * | 2005-07-05 | 2007-01-10 | 日本电气株式会社 | Base station and transmission power control method |
CN101720122A (en) * | 2009-12-28 | 2010-06-02 | 中兴通讯股份有限公司 | Method, base station and terminal for controlling power of physical uplink control channel |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8437792B2 (en) * | 2007-02-14 | 2013-05-07 | Qualcomm Incorporated | Uplink power control for LTE |
-
2010
- 2010-07-21 CN CN2010102351409A patent/CN101895976B/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1866774A (en) * | 2005-05-16 | 2006-11-22 | 上海华为技术有限公司 | Method for carrying out power control on forward access channel |
CN1893305A (en) * | 2005-07-05 | 2007-01-10 | 日本电气株式会社 | Base station and transmission power control method |
CN101720122A (en) * | 2009-12-28 | 2010-06-02 | 中兴通讯股份有限公司 | Method, base station and terminal for controlling power of physical uplink control channel |
Non-Patent Citations (3)
Title |
---|
LG Electronics.Uplink power control in LTE-Advanced.《3GPP TSG RAN WG1 #59 R1-094470》.2009, * |
Motorola.ULPC: Simultaneous transmission of PUCCH and PUSCH in case of power limitation.《3GPP TSG RAN1#59bis R1-100201》.2010, * |
Nokia Siemens Networks, Nokia Corporation.Power reduction rule for uplink carrier aggregation.《3GPP TSG RAN WG1 #61 Meeting R1-102947》.2010, * |
Also Published As
Publication number | Publication date |
---|---|
CN101895976A (en) | 2010-11-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN101895976B (en) | LTE-Advanced system-based uplink power adjustment method | |
EP2842375B1 (en) | Maximum output power configuration with ue preference in carrier aggregation | |
CN101557246B (en) | Uplink power control method and device | |
CN102647796B (en) | Method and device for upstream resource allocation | |
CN102076072B (en) | Uplink power control method, user equipment (UE) and carrier aggregation (CA) system | |
EP1811686B1 (en) | Method and apparatus for open loop power control in Frequency Division Multiple Access (FDMA) system | |
US20180027509A1 (en) | Uplink scheduling apparatus and method based on uplink report in wireless communication system | |
CN101340413B (en) | Method for solving uncontrollability of OFDMA system terminal power spectral density | |
US8797983B2 (en) | Apparatuses and methods for allocating spectrum resources in a wireless communication network | |
CN108206711B (en) | A kind of UE for power adjustment, the method and apparatus in base station | |
CN116867046A (en) | Base station, terminal, method executed by base station, and method executed by terminal | |
CN109152030A (en) | The shared method and device of power | |
CN103329602A (en) | Uplink transmission power configuration method and apparatus for mobile communication system | |
US10772049B2 (en) | Method for terminal for reporting power headroom in wireless communication system, and terminal utilizing method | |
CN102158942A (en) | Power control method, network equipment and terminal | |
US10080200B2 (en) | Intelligent deployment cascade control device based on an FDD-OFDMA indoor small cell in multi-user and interference environments | |
CN101873686A (en) | Power control method of TD-LTE (TD-SCDMA Long Term Evolution) system | |
US20110177838A1 (en) | Method and system for space-time power control for mimo transmissions | |
CN107360621A (en) | A kind of LTE A ascending power control methods based on RSRP measured values | |
CN109246810B (en) | Uplink scheduling correction method and system based on LTE system | |
CN102111862B (en) | Uplink power regulation method based on reciprocity of uplink channel and downlink channel | |
US9693357B2 (en) | Method and apparatus for allocating resource | |
JP2009284327A (en) | Radio transceiver device | |
KR101248944B1 (en) | Method and Apparatus for downlink power control in wireless communication system | |
CN104080157A (en) | Uplink power control method for trunking terminal |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131023 Termination date: 20140721 |
|
EXPY | Termination of patent right or utility model |